Which is the equation for terminal velocity?

It would take 0.717 seconds to reach the ground if it is thrown straight down with the same speed.

What is speed?

Speed is the rate of motion or movement of an object. It is calculated by dividing the distance the object travels by the time it takes to travel that distance. It can be calculated in different ways, such as miles per hour, kilometers per hour, meters per second, and feet per second. Speed is essential for activities such as driving, running, and biking. Speed can also be used to measure the velocity of an object in a given direction. It is an important concept in physics, with speed being a vector quantity that is the magnitude of a velocity.

[tex]$$The known values are: $t=2.35 \mathrm{~s} ; y=0 \mathrm{~m} ; v_0=+8.00 \mathrm{~m} / \mathrm{s} ;$ and $a=-9.8 \mathrm{~m} / \mathrm{s}^2$Based on the given values, the formula that we shall use is$$y=y_0+v_0 t+\frac{1}{2} a t^2$$Substituting the values, we have$$[/tex]

[tex]$$\begin{aligned}y & =y_0+v_0 t+\frac{1}{2} a t^2 \\0 & =y_0+(8.00 \mathrm{~m} / \mathrm{s})(2.35 \mathrm{~s})+\frac{1}{2}\left(-9.80 \mathrm{~m} / \mathrm{s}^2\right)(2.35 \mathrm{~s})^2 \\y_0 & =8.26 \mathrm{~m} \quad \text { }\end{aligned}$$[/tex]

Therefore, the cliff is 8.26 meters high.

[tex]$\begin{aligned}y & =y_0+v_0 t+\frac{1}{2} a t^2 \\0 \mathrm{~m} & =8.26 \mathrm{~m}+(-8.00 \mathrm{~m} / \mathrm{s}) t+\frac{1}{2}\left(-9.80 \mathrm{~m} / \mathrm{s}^2\right) t^2 \\4.9 t^2+8 t-8.26 & =0\end{aligned}$$ \text {Using the quadratic formula to solve for the value of t we have}$$\begin{aligned}& t=\frac{-8 \pm \sqrt{(8)^2-4(4.9)(-8.26)}}{2(4.9)} \\& t=0.717 \mathrm{~s} \quad \text { }\end{aligned}$$[/tex]

Thus, It would take 0.717 seconds to reach the ground if it is thrown straight down with the same speed.

To learn more about speed Here:

https://brainly.com/question/13943409

#SPJ4

Complete question:

(a) Calculate the height of a cliff if it takes 2.35 s for a rock to hit the ground when it is thrown straight up from the cliff with an initial velocity of 8.00 m/s.

(b) How long would it take to reach the ground if it is thrown straight down with the same speed?

The angle of inclination of the plane is 59.36 degrees. A package that weighs 200 lb and a force of 80 lb is just sufficient to keep the package from sliding, the angle of inclination of the plane is 59.36.

The power of 80 lb is the power of gravity following up on the bundle toward the path inverse to the heading of the incline. The power of gravity can be addressed by the situation:

F_gravity = m * g

where m is the mass of the bundle and g is the speed increase because of gravity (9.8 m/s^2). To find the mass of the bundle, we want to switch the load from pounds over completely to kilograms:

m = 200 lb * 0.45359237 kg/lb = 90.718474 kg

Then, we can involve the condition for power of gravity to track down the point of tendency of the plane:

F_gravity = m * g

80 lb = 90.718474 kg * 9.8 m/s^2

80 lb = 886.697 N

The ordinary power following up on the bundle is equivalent and inverse to the power of gravity. This ordinary power is given by:

F_normal = m * g * sin(θ)

where θ is the point of tendency of the plane. Setting F_normal equivalent to 80 lb, we can track down the point of tendency:

80 lb = 90.718474 kg * 9.8 m/s^2 * sin(θ)

80 lb/(90.718474 kg * 9.8 m/s^2) = sin(θ)

0.86603 = sin(θ)

θ = sin^-1(0.86603) = 59.36 degrees

In this way, the point of tendency of the plane is 59.36 degrees

To learn more about force, refer:

https://brainly.com/question/15585772

#SPJ4

Let the time, T is proportional to [tex]c^{x} g^{y}h^{z}[/tex]

=> T = k     [tex]c^{x} g^{y}h^{z}[/tex]

Taking dimensions on both the sides,

[[tex]M^{0} L^{0}T^{1}[/tex]] = [tex][L^{1}T^{-1}]^x[/tex] [tex][M^{-1} L^{3}T^{-2}]^y[/tex] [tex][M^{1} L^{2}T^{-1}]^z[/tex]

i.e.,

[[tex]M^{0} L^{0}T^{1}[/tex]] = [tex][M^{-y+z} L^{x+3y+2z}T^{-x-2y-z}][/tex]

Equating power of M,L,T on both sides, we get

-y + z= 0...….. (1)

x+3y+2z= 0...….(2)

-x-2y-z= 1........(3)

From (1) => y=z

Adding (2) and (3)=> y+z=1

or 2y=1 (from (1)) i.e., y= [tex]\frac{1}{2}[/tex]

Therefore, z=y= [tex]\frac{1}{2}[/tex]

Putting these values in (2) we get,

[tex]x+\frac{3}{2} +1 = 0[/tex] or [tex]x =- \frac{5}{2}[/tex]

Hence , [T]= [tex][g^{\frac{1}{2} }h^{\frac{1}{2} }c^{\frac{-5}{2} } ][/tex]

To know more about, dimensional analysis,

https://brainly.com/question/30303546

#SPJ4

It would take 50 min of time for the entire swim.

What is speed ?

The definition of speed, a direction or speed at which an object's location changes. The distance traveled relative to the time it took to travel that distance is how fast something is moving. As it just has a direction and no magnitude, speed is a scalar quantity.

What is acceleration ?

The pace at which speed changes is known as acceleration. Acceleration typically, but not always, indicates a change in speed. Because the direction of an object's velocity is shifting even while it follows a circular course, it continues to accelerate.

u = velocity of student and v = velocity of water.

when student is swimming downwards, the water flows in the same direction as he is travelling. Hence you add up the two velocities:

u + v

when student is swimming upwards, the water flows in the opposite direction as he is travelling. Hence you subtract up the two velocities:

u - v

time to swim downward = s / (u+v)

1200 = 1200 / (0.3 + v)

v = 0.7 m/s velocity of student as he swims downward

time to swim upward = S/ (u-v)

time = (1200) / (0.7 - 0.3)

time = 3000 seconds

time = 3000 seconds x (1 min / 60 seconds)

time = 50 minutes

Thus, It would take 50 min of time for the entire swim.

Learn more about speed  from the given link.

https://brainly.com/question/27888149

#SPJ4

Any measurement that includes both magnitude and direction is vector.

A vector is a quantity that has both magnitude and direction.

Force, acceleration, and displacement, for instance

A "vector" is a quantity that possesses both magnitude and direction.

A vector is a quantity with magnitude and direction in physics.It is sometimes shown as an arrow with a length proportional to the size of the quantity, pointing in the same general direction as the amount. A vector has magnitude and direction but not position. As long as a vector's length remains constant, it is therefore unaffected by displacement that occurs parallel to it.

Scalars are regular quantities that have a magnitude but no direction, in contrast to vectors. In contrast to speed (the amount of velocity), time, and mass, which are scalar values, displacement, velocity, and acceleration are vector quantities.

Learn more about vector

brainly.com/question/24256726

#SPJ4

The four methods of acquiring knowledge are observation, experience, reasoning, and education.

Observation involves gathering information through the senses and paying attention to what is happening in the environment. Experience involves learning through personal encounters, such as practical work or life events. Reasoning involves using logic and critical thinking to draw conclusions and make decisions.

Education involves acquiring knowledge through formal instruction and learning, such as in a school setting or through reading and studying. All four methods are important and can be used in combination to acquire a deep and well-rounded understanding of a subject.

Observation and experience provide hands-on and practical knowledge, while reasoning and education provide theoretical and abstract knowledge. By using a combination of these methods, individuals can broaden their understanding and knowledge of the world around them.

To know more about critical thinking click on the link below:

https://brainly.com/question/12980631#

#SPJ11

The weight of the rover curiosity on mars is: 339.43 N

In physics, gravity is the force of attraction that the earth exerts on all bodies possessing mass by pulling them toward its center.

To solve this exercise, the formula and procedure to be applied is:

W = m * g

Where:

Information about the problem:

Applying the weight formula, and clearing the mass we get:

m =W/g

m= 900 N /9.81 m/s

m = 91.74 kg

Applying the weight formula, we get:

W(mars) = 91.74 kg * 3.7 m/s2

W = 339.43 N

Learn more about gravity at: brainly.com/question/557206

#SPJ4

To determine the direction of the force on +q in the figure, given that Case I qa = qb = 7.5 μC and qc = qd = 7.5 μC, you need to:

(a) Draw the forces on q due to qa, qb, qc and qd in your notebook

(b) Use symmetry to find the direction of the net force

Hint: for each force, draw the x and y components.

The process involves two steps: (a) drawing the forces on q due to charges qa, qb, qc and qd in your notebook and (b) using symmetry to find the direction of the net force. For each force, you need to draw the x and y components to help you visualize the net force.

Find more about Force

brainly.com/question/30258441

#SPJ4

Regarding friction and the brake system in the preceding sentence, Techs A and B are correct.

The heat produced by friction between brake drum linings and drums also reduces the mechanical energy required to move the brake drums and wheels. In conclusion, both experts are accurate because the brake-by-wire system is known to frequently use the electric motor as a type of generator, which helps to reduce the vehicle The following expression can be used to determine the car's kinetic energy (Ek). Ek = 1/2 m/v2 = 1/2 (1450 kg)/(36 m/s)2 = 9.4 105 J. where, m: mass, speed v. As soon as the car comes to a halt, this energy is transformed into heat (Q), which is then utilized to increase the temperature of the iron brake drums. Q = c × m × ΔT where c: particular heat, m: mass. T: Alteration in temperature

Learn more about Energy  here:

https://brainly.com/question/22876618

#SPJ4

If the thermometer reads the outside temperature at 70.0 °f, then it is  21.11 Celsius.

The degree of hotness or coldness of an object can be termed as Temperature. THERMOMETER are the instruments used to measure it . There are different units of measuring temperature which are interconvertible. The units are Fahrenheit (°F), Celsius (°C), Kelvin (K) etc.

In this question, the thermometer reads 70°F. To convert this temperature reading to °C, we use the formula:

°C] = ([°F] − 32) × 5/9

Hence,

[°C] = (70− 32) × 5/9

[°C] = (38) × 5/9

[°C] = 190/9

= 21.1 °c

Learn more about thermometer:

brainly.com/question/17770038

#SPJ4

Because the sound-wave fronts arrive at the platform at a frequency lower than the frequency at which they are produced, the sound that the passengers standing on the platform hear has a frequency that is lower.

What is a sound wave ?

When energy moves through a medium and propagates away from the sound source, it creates a pattern of disruption known as a sound wave. Pressure waves are produced when an object vibrates, such as a ringing phone, and these waves are known as sound waves.

Doppler effect states that as the train is moving farther away, those on the platform would hear a sound with a lower frequency if it were to leave the station.

To learn more about sound waves use link below:

https://brainly.com/question/1173066

#SPJ4

Absolutely zero (0 K) mostly on Kelvin scale seems to be the temperatures at which the gas's volume is zero. the lowest temperature on any scale. So, -273.15 oC is the Kelvin scale's zero.

Since these measurements do not begin at zero, a movement in Celsius or Degrees fahrenheit is not intrinsically linked to angular momentum or volume. Also because Kelvin scale is a temperature t scale that correlates perfectly with kinetic energy and volume, scientists utilize it.

The Celsius scale and the Kelvin scale are connected. Since there is a 100 degree difference in between water's freezing and boiling temperatures of water, the kelvin scale is equivalent to that of the Celsius scale.

To know more about kelvin scale visit:

https://brainly.com/question/13290721

#SPJ4

Answer: The increase is due to natural growth of the lens.

Explanation:

The surface temperature of an object that is exposed to the sun's heat depends on several factors such as the object's material, its reflectivity, its color, and the angle at which it is facing the sun.

define temperature ?

Temperature is a measure of the average thermal energy of the particles in a substance or system. It represents the level of heat energy in a system, and is used to describe the hotness or coldness of an object relative to a standard. The temperature of a substance is a scalar quantity, and is typically measured in units such as degrees Celsius (°C), Kelvin (K), or Fahrenheit (°F).

The surface temperature of an object that is exposed to the sun's heat depends on several factors such as the object's material, its reflectivity, its color, and the angle at which it is facing the sun. Without more information on the specific object you are referring to, it is not possible to determine the surface temperature.

To learn more about temperature  follow the given link: https://brainly.com/question/2339046

#SPJ4

The correct option is (C) i.e. The object's total speed remains constant during the entire flight, is the statement which concerned about the motion of an ideal projectile launched.

For an ideal projectile launched at an angle of 45° to the horizontal, the velocity vector is composed of two components: horizontal velocity and vertical velocity. The horizontal velocity as in motion remains constant, while the vertical velocity changes due to the force of gravity. However, the magnitude of the velocity vector, which is the total speed of the object, remains constant during the entire flight. A projectile is an object that is thrown or shot into the air and then moves under the influence of gravity. When a projectile is launched, its motion can be described by its position, velocity, and acceleration. The motion of a projectile is determined by its initial velocity, the angle at which it is launched, and the force of gravity acting upon it.

To know more about motion please refer: https://brainly.com/question/12536970

#SPJ4

Question - Which one of the following statements is true concerning the motion of an ideal projectile launched at an angle of 45° to the horizontal?

A. The acceleration vector points opposite to the velocity vector on the way up and in the same direction as the velocity vector on the way down.

B. The speed at the top of the trajectory is zero.

C. The object's total speed remains constant during the entire flight.

D. The vertical speed decreases on the way up and increases on the way down.

Option B; Half-life is a fundamental concept in radioactive decay. It is defined as the time it takes for half of the initial number of radioactive atoms to decay.

For a given radioactive isotope with a half-life of T, the fraction of the initial number of radioactive atoms that remain after a time t can be calculated using the equation:

fraction remaining =[tex](1/2)^(t / T)[/tex]

where t is the time elapsed.

In the case of Au-198 with a half-life of 2.5 days, the fraction of the initial activity that remains after 20 days can be calculated as:

fraction remaining =[tex](1/2)^(20 / 2.5) = (1/2)^8 = 1/256[/tex]

So, only 1/256th of the initial activity remains after 20 days.

The remaining activity after 20 days can then be calculated by multiplying the fraction remaining by the initial activity:

activity = fraction remaining * initial activity =[tex](1/256) * 15 mCi = 0.0586 mCi[/tex]

So, the answer is[tex]0.0586 mCi[/tex], which is closest to option B: [tex]0.09036 mCi[/tex].

To learn more about radioactive decay please click on below link

https://brainly.com/question/1770619

#SPJ4

The speed of the block when it is 3.40 m from the top of the incline is 3.14 m/s.

We can use the equation of motion for an object with constant acceleration to solve for its velocity at a given position.

v = v0 + at, where

v = final velocity

v0 = initial velocity (0 m/s since the block was released from rest)

a = acceleration

t = time elapsed

The time elapsed can be found by using the position equation:

[tex]x = x_0 + v_0t + \frac{1}{2}at^2[/tex]

where

x = position

x0 = initial position (0 m since the block was released from rest)

We can rearrange this equation to solve for t:

[tex]t = \sqrt{2x/a}[/tex], where

x = position

Substituting this expression for t into the velocity equation, we have:

[tex]v = v_0 + a \sqrt{\frac{2x}{a}}[/tex]

[tex]v = \sqrt{2ax}[/tex]

Substituting the known values for x (3.40 m) and a (calculated from the final velocity and position), we have:

[tex]a = (v^2 - v_0^2) / 2x\\ a = (3.80 m/s)^2 / 2 * 6.80 m\\ a = 2.24 m/s^2[/tex]

Finally, we can use this value for a to find the velocity of the block at the desired position (3.40 m from the top of the incline):

[tex]v = \sqrt{2ax}\\v = \sqrt{2 * 2.24 m/s^2 * 3.40 m} \\ v = 3.14 m/s[/tex]

Find out more about Acceleration and Velocity

brainly.com/question/14746413

#SPJ4

The required new volume of the balloon when initial pressure, temperature and volume are specified is 5/6 L.

From ideal gas law, we know,

PV/T = constant

When we have to compare the pressures, volumes and temperatures of two different gasses, we can write the formula as,

P₁V₁/T₁ = P₂V₂/T₂ ----(1)

It is given that volume of ideal gas V₁ = 5 L ----(2)

Pressure of the ideal gas P₂ = 3 P₁

P₁/P₂ = 1/3 -----(3)

It is given that temperature is halved T₂ = 1/2 T₁

T₂/T₁ = 1/2 ----(4)

The new volume of the balloon V₂ = ?

Making V₂ as subject in (1) and substituting (2), (3) and (4), we have,

P₁V₁/T₁ = P₂V₂/T₂

V₂ = P₁V₁ T₂/P₂ T₁ = (P₁/P₂)(T₂/T₁)V₁ = 1/3 × 1/2 × 5 = 5/6 L

Thus, the new volume of the balloon is 5/6 L.

To know more about volume:

https://brainly.com/question/13386907

#SPJ4

The empirical formula of this CHO compound is C₅HO₆

The empirical formula is a formula for a compound that specifies the proportions of each element present, but it does not provide the overall number of atoms in the complex. The compound's lowest ratio between its constituent elements can be found there. To determine the precise number of atoms or the molecular formula of the compounds, we use the molar mass of the molecule.

The chemical equation below represents the burning of carbon and hydrogen in hydrocarbons:

CₓHₐOₙ ⇒CO₂ +H₂O

First, we divide each element's mass by its atomic mass to determine its mass;

Mass C= 12/44 x 0. 1486 g = 0.0405 g

Mass H = 2/18 x 0. 0609 g = 0.0067 g

Mass O = 0.1014 - 0.0405 - 0.0067 = 0.0542 g

Using molar masses we can calculate the moles:

0.0405 g / 12.0 g/mol = 0.003375moles C

0.0067 g / 1.01 g/mol = 0.00067 moles H

0.0542 g / 16.0 g/mol  = 0.003387 moles O

0.00067 is lesser, so use it to normalize to find the ratio.

The ratios are:

0.003375 moles C / 0.00067 = 5

0.00067 moles H / 0.00067 = 1

0.003387 O / 0.00067= 6 mole O

C:H:O

5:1:6

soh the empirical formula will be C₅HO₆

To know more about empirical formula visit:

brainly.com/question/11588623

#SPJ4

To determine which of eight balanced identical-looking stones is slightly heavier than the others using three single-use scales, you can follow these steps:

Divide the stones into two groups of four.

By following these steps, you can determine which of the eight identical-looking stones is slightly heavier than the others using only three single-use scales.

Learn more about balanced here:

https://brainly.com/question/29707870

#SPJ4

The complete Question is:

How to determine which of eight identical-looking stones is slightly heavier than the others using three single-use scales?

The temperature on the Fahrenheit scale is approximately 4800oF . The temperature on the Celsius scale is approximately 2600oC .

What is Fahrenheit, exactly?

Fahrenheit. Fahrenheit, pronounced "far-n-ht," is a term used to describe something that relates to, complies with, or has a thermometer scale on which, at standard atmospheric pressure, the boiling point of water is 212 degrees above zero and the freezing point is 32 degrees above zero.

Describe Fahrenheit with several instances.

Water freezes at 32 degrees Fahrenheit and boils at 212 degrees, according to this temperature scale. Fahrenheit is represented by the symbol °F, and temperatures are written as 32°F, 75°F, and so foth.

Learn more about Fahrenheit :

brainly.com/question/23419049

#SPJ4

The change in the object's velocity is: 6.25 m/s

It is the physical magnitude that expresses the effort necessary to move the mass of one kilogram with an acceleration of one meter per second squared, this is expressed in units of the international system in Newton.

To solve this exercise, the formulas and procedures to be applied are:

Where:

Information about the problem:

Applying the force formula and isolating the acceleration, we get:

a= F/m

a= 4.5 n /7.2 kg

a=0.625 m/s²

Applying the final velocity formula, we have:

vf = 0 m/s + (0.625 m/s²* 10.0 s)

vf = 0 m/s + 6.25 m/s

vf = 6.25 m/s

Learn more about force at: brainly.com/question/12970081

#SPJ4

Electric potential at a point in space can be thought of as the amount of electrical energy per unit charge that a point charge would possess if placed at that location. The electric potential at a point a finite distance away from a large positive charge depends on the charge and the distance between the point and the charge.

In general, electric potential decreases with increasing distance from a point charge. If two points are equidistant from a charge, the electric potential will be the same at both points. However, if two points are at different distances from a charge, the electric potential at the point closer to the charge will be higher.

Therefore, the electric potential at a point x from a large positive charge will be greater than the electric potential at a point x/2 from the same charge. This is because the closer point is closer to the source of the electric field, and therefore experiences a greater electric potential. The electric field strength decreases as one moves away from the source, so the electric potential will also decrease as the distance from the source increases.

It is important to note that electric potential is a scalar quantity, meaning it only has magnitude and no direction. The electric potential difference between two points is equal to the work done per unit charge in moving a test charge from one point to the other. In other words, the electric potential difference between two points is a measure of the energy required to move a unit charge from one point to the other.

Here you can learn more about electric potential

https://brainly.com/question/12645463#

#SPJ11

Inferring an internal shear force, VA = -5 kips (downward) or 5 kips from the equation in vertical equilibrium, Fy = -5 - VA = 0, (upward). MA = -5(2.5) - MA = 0, according to the moment equilibrium equation.

An item can be turned by a force or combination of forces. A moment seems to be the result of a force turning. Moments move in such a clockwise or counterclockwise direction around a point. The pivot, often referred to as the fulcrum, is typically chosen as the chosen point, though any point here on object could be picked.

When a force does not have an equal and opposing force acting immediately across its path of action, a moment results. Consider two individuals attempting to open a door there at doorknob from opposing sides. There is an equilibrium state if they are both pushing with the same amount of force.

To know more about moment  visit:

https://brainly.com/question/6278006

#SPJ4

State functions, also known as state variables, are properties of a thermodynamic system that depend only on the current state of the system, and not on the path taken to reach that state. They are commonly used to describe and predict changes in the energy, temperature, pressure, and volume of a system.

State functions are properties of a system that depend only on its current state, not on the path taken to reach that state. The following are state functions:

The internal energy of a system

The volume of an aerosol can.

The following are not state functions:

The temperature of an ice cube (temperature is a state function, but the temperature of a specific object like an ice cube is not, as it depends on the path taken to reach that temperature)

The distance from the front of the PHSC building to AYRS 120 (distance is not a state function, as it depends on the path taken to reach that point)

The current balance in your bank account (this is not a thermodynamic property and therefore not a state function)

Learn more about state function:

brainly.com/question/15563372

#SPJ4

Pie charts are circles with segments that represent the relative frequencies of various categories of a qualitative variable.

Pie charts are used to illustrate the proportions of a whole, and to compare the relative sizes of different categories. Pie charts are most effective when there are only a few categories, as it can be difficult to distinguish between the different sections when there are too many frequencies. Pie charts are frequently utilized in the media and in the business world. However, due to the difficulty in comparing data between pie charts or among different pie charts, they have received criticism, and many experts advise against using them. Most of the time, pie charts can be replaced by other plots, such as the bar chart, box plot, dot plot, etc.

To know more about frequencies please refer: https://brainly.com/question/29258453

#SPJ4

To calculate the volume of a gas, apply the Ideal Gas Law: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature. To calculate the smallest and largest volumes of a gas, first determine its pressure, temperature, number of moles, and ideal gas constant. Then, using the Ideal Gas Law, you can change the pressure and temperature and calculate the volume.

A volume measurement is a three-dimensional spatial measurement. It is typically quantified statistically using SI-derived units or other imperial or US customary units. The definition of volume is connected to the concept of length. The space filled by an item within the limitations of three-dimensional space is defined as volume. It is sometimes referred to as the object's capacity.

To know more about volume,

https://brainly.com/question/10831664

#SPJ4

We can conclude that the electromagnet's strength is inversely correlated with the coil's number of turns. The electromagnet's strength doubles when the number of turns is doubled, every coil of wire increases the "magnetic flux density" of your magnet.

What is energy ?

Energy is a quality of matter and radiation that is the capacity to perform work. It can appear in a variety of forms, such as thermal energy, light energy, mechanical energy, electrical energy, and chemical energy. According to the law of conservation of energy, energy can be changed from one form to another but cannot be produced or destroyed.

Numerous natural processes and activities, such as photosynthesis in plants, the flow of ocean currents, and the production of electricity in power plants, depend on energy. Energy is frequently referred to as a scalar quantity in physics and is typically measured in units of joules (J) or electron volts (eV).

To learn more about the energy , click the given link ; https://brainly.com/question/13881533

#SPJ4

If you have 200 lbs of coal in your shed and you burn 1 lb a day, it will need 200 days for last.

Coal is a sedimentary rock formed from the remains of organic and combustible deposits. There are a number of benefits of coal in everyday life.

Based on research by geologists, coal was formed around 340 million years ago. Coal itself comes from the remains of plants that have decayed hundreds of millions of years ago.

It takes a very long time for coal to form again. Therefore, coal is a type of non-renewable natural resource that makes it relatively expensive.

The main benefit or use of coal is as fuel. The heat produced by coal is very high and can be converted into other energy. Therefore, coal is often used in life.

Learn more about coal at

https://brainly.com/question/12981477.

#SPJ4

A 45 kg man is pulling up his 56 kg climbing partner up a cliff via a cable pulley. If he pulls with a force of 3000N, the net force of the horizontal motion is 2,451.2 N

Unless acted upon by an imbalanced force, an object at rest tends to stay at rest, and an object in motion tends to stay in motion with the same speed and direction.

The term "unbalanced force" in Newton's first law refers to a force that is not entirely counterbalanced (or cancelled) by the other independent forces. An uneven force exists if either all the vertical forces (up and down) or all the horizontal forces do not cancel each other.

The vector sum of all forces acting on an object is known as the net force. In other words, the net force is the culmination of all forces.

so F pulling up is 3000 N, first we should calculate force of the partner

Force = mass x accelleration

Force partner = 56 Kg x 9.8 = 548.8 N

net force = force pulling up - force partner

Net force horizontal =  3000 N - 548.8 N =2,451.2 N

Learn more about net force here: brainly.com/question/14361879

#SPJ1