Who invented gravity

Answer:

Explanation:

Using the law of conservation of momentum;

[tex]m_1 u_1+m_2u_2 = m_1v_1+m_2v_2[/tex]

here;

There is a need for conservation of the total momentum that occurred before and after the collision.

So;

[tex]m_1[/tex] = mass of cart X

[tex]m_2[/tex] = mas 9f cart Y

[tex]u_1[/tex] = velocity of cart X (before collision)

[tex]u_2[/tex] = velocity of cart Y (before collision)

[tex]v_1[/tex] = velocity of cart X (after collision)

[tex]v_2[/tex] = velocity of cart Y (after collision)

So;

[tex]m(u_1+0) =(m_1v+m_2)v[/tex]

because the mass is identical and v represents the velocity of both carts.

Now;

[tex]u_1[/tex] = 2 m/s

[tex]u_2[/tex] = 0 ( at rest)

∴

m(2) = (2m)v

v = 1 m/s

Thus, we can see from the graphical image attached below that the velocity of X reduces to 1 m/s after collision with cart Y.

This question is in two parts. This is not the correct multiple choice options for this part a.

The second part had the option

b)If your bedroom has a circular shape, and its diameter measured 6.32 , which of the following numbers would be the most precise value for its area?

a)30 m^2

b) 31.4 m^2

c)31.37 m^2

d)31.371 m^2

Answer:

A. 17.0 m²

B. 31.4 m²

Explanation:

The formula for the calculation of the area of a rectangle is given as

Area = length x width

The length = 3.547 m

The width = 4.79 m

Then area = 3.547 x 4.79

= 16.990m²

When approximated = 17.0m²

This is the most precise measurement for the area of the bedroom.

B.

We solve b using this formula

Area = pi(diameter/2)^2

= 3.14(6.32/2)²

= 3.14 x 9.9856

= 31.4 m²

Answer:

[tex]c=71.4m/s[/tex]

[tex]\theta=8.54\textdegree[/tex]

Explanation:

From the question we are told that

Initial velocity of 60 m/s

Wind speed [tex]V_w= 15 m/s \angle 45 \textdegree[/tex]

Generally Resolving vector mathematically

  [tex]sin(45\textdegree)15=10.6\\cos(45\textdegree)15=10.6[/tex]

Generally the equation Pythagoras theorem is given mathematically by

[tex]c^2=a^2+b^2[/tex]

[tex]c^2=10.6^2 +(10.6+60)^2[/tex]

[tex]c=\sqrt{10.6^2 +(10.6+60)^2}[/tex]

Therefore Resultant velocity (m/s)

[tex]c=71.4m/s[/tex]

b)Resultant direction

Generally the equation for solving Resultant direction

[tex]\theta=tan^-1(\frac{y}{x})[/tex]

Therefore

[tex]\theta=tan^-1(\frac{10.6}{70.6})[/tex]

[tex]\theta=8.54\textdegree[/tex]

Answer:

She takes pictures and analyzes DNA samples

As positively charged sodium ions enter the axon, potassium ions flow out to repolarize part of the axon.

At the beginning of an action potential of cell membrane, the sodium ion gates open and sodium ions flows into the cell.  This process is called depolarization. Due to rapid influx of sodium ion, the channel is eventually closed.

The potassium channels are then activated in a process called repolarization. This process occurs when the potassium channels open and allow potassium ions to flow out of the cell.

To maintain the cell membrane potential, cells are kept at low concentration of sodium ions and high concentration of potassium ions.

Thus, as positively charged sodium ions enter the axon, potassium ions flow out to repolarize part of the axon.

Learn more here: https://brainly.com/question/7778945

Answer:

the answer is a 304.6m/s

Explanation:

1,523 / 5 equals 304.6

Answer:

585lb

Explanation:

Given the formula for calculating the magnitude of the resultant force as;

[tex]F_R = F_1 + F_2[/tex]

Given

[tex]F_1 = 235 lb \ and \ F_2 = 350 lb\\F_R = 235lb + 350lb\\F_R = 585lb\\[/tex]

Hence the magnitude of the resultant force is 585lb

Photographic paper reacts to light to produce the image taken by a camera and stored on film. Darkrooms used red lighting to allow photographers to control light carefully, so that light-sensitive photographic paper would not become overexposed and ruin the pictures during the developing process.

Answer:

Photographic paper reacts to light to produce the image taken by a camera and stored on film.

Explanation:

Darkrooms used red lighting to allow photographers to control light carefully so that light-sensitive photographic paper would not become overexposed and ruin the pictures during the developing process.

Answer:

Explanation:   the Star Connection, the similar ends (either start or finish) of the three windings are connected to a common point called star or neutral point. The three-line conductors run from the remaining three free terminals called line conductor

Answer:

Given that:

Time taken = 5 seconds

Distance = 15 meters

Force = 150 Newtons

Power = ?

Recall that power is the rate of work done per unit time

i.e Power = work / time

(since work is a product of force and distance, then

power = (force x distance)/ time

Power = (150 Newtons x 15 m) / 5 s

Power = 2250 / 5

Power = 450 joules per second

Answer:

450 joules/sec

Explanation:

150 x 15 = 2,250

2,250 / 5 = 450

                = 450 joules/sec

Answer:

Force = -1161.6 Newton

Explanation:

Given the following data;

Initial velocity, u = 44m/s

Distance ,s = 12.5cm to m = 12.5/100 = 0.125m

Mass = 0.15kg

To find the acceleration;

We would use the third equation of motion;

V ² = U² + 2as

0² = 44² + 2*a*0.125

0 = 1936 + 0.25a

0.25a = -1936

a = -1936/0.25

Acceleration, a = -7744m/s2

Force = mass * acceleration

Substituting into the equation, we have;

Force = 0.15 * (-7744)

Force = -1161.6 Newton

The value of its force is negative because the glove decreases the velocity of the ball.

Answer:

Explanation:

We shall apply Doppler's effect of sound .

speaker is the source , Jason is the observer . Source is moving at 10 m /s , observer is moving at  6 m/s .

apparent frequency = [tex]f_o\times\frac{V+v_o}{ V-v_s}[/tex]

V is velocity of sound , v₀ is velocity of observer and v_s is velocity of source and f_o is real frequency of source .

Here V = 340 m/s , v₀ is 6 m/s , v_s is 10 m/s . f_o = f

apparent frequency =  [tex]f\times \frac{340+6}{340-10}[/tex]

= [tex]f\times \frac{346}{330}[/tex]

So m = 346 , n = 330 .

Answer:

Explanation:

Firstly, we have to define momentum.

Momentum is define as the product of mass and velocity.

That is P = mass×velocity

Also considering the third law of motion which states that: For every action, there is equal and opposite reaction.

Moreso, considering the 2nd law of motion which states that the rate of change in the momentum of a body is equal to the applied force and takes place in the direction of the applied force.

Now, applying P = mass×velocity

They both have same mass and velocity definitely, they will both experience same momentum.

Also from the question, the both share same velocity hence, the will both hit the wall with same velocity meaning the will both feel the same impact from the wall as well. Hence the third law of motion proves this right.

Answer:172799.2

Explanation:

Answer:

See explanation

Explanation:

The centripetal force keeps an object moving in a circular orbit at constant velocity. The velocity of an object undergoing uniform motion is always tangential to the circle while the centripetal force is directed towards the center of the circle.

This now implies that the direction of the force acting on a body undergoing circular motion at constant velocity is perpendicular to the direction in which the object is being displaced.

Answer:

4.38 km

Explanation:

Volume of oil slick, V = Area of oil slick, A × thickness of 1 molecule, d'

Since the oil slick spreads out in a circular area, it has the area of a circle.

So, V = πd²/4 × d'

d² = 4V/πd'

d = 2√(V/πd') where d = diameter of oil slick.

Since V = 3000 cm³ = 3000 × 10⁻⁶ m³ = 3 × 10⁻³ m³ and d' = 2 × 10⁻¹⁰ m

So, d = 2√(3 × 10⁻³ m³/(π × 2 × 10⁻¹⁰ m))

= 2√(3 × 10⁻³ m³/(6.283 × 10⁻¹⁰ m))

= 2√(0.477 × 10⁷ m²) = 2√(4.775 × 10⁶ m²)

=  2 × 2.19 × 10³ m

= 4.38 × 10³ m

= 4.38 km

Answer:

a) The change in potential energy of a 3.0 kilograms backpack carried up the stairs.

b) The change in potential energy of a persona with weight 650 newtons that descends the stairs is -2665 joules.

Explanation:

Let consider the bottom of the first floor in a building as the zero reference ([tex]z = 0\,m[/tex]). The change in potential energy experimented by a particle ([tex]\Delta U_{g}[/tex]), measured in joules, is:

[tex]\Delta U_{g} = m\cdot g\cdot (z_{f}-z_{o})[/tex] (1)

Where:

[tex]m[/tex] - Mass, measured in kilograms.

[tex]g[/tex] - Gravitational acceleration, measured in meters per square second.

[tex]z_{o}[/tex], [tex]z_{f}[/tex] - Initial and final height with respect to zero reference, measured in meters.

Please notice that [tex]m\cdot g[/tex] is the weight of the particle, measured in newtons.

a) If we know that [tex]m = 3\,kg[/tex], [tex]g = 9.807\,\frac{m}{s^{2}}[/tex], [tex]z_{o} = 0\,m[/tex] and [tex]z_{f} = 4.1\,m[/tex], then the change in potential energy is:

[tex]\Delta U_{g} = (3\,kg)\cdot \left(9.807\,\frac{m}{s^{2}} \right)\cdot (4.1\,m-0\,m)[/tex]

[tex]\Delta U_{g} = 120.626\,J[/tex]

The change in potential energy of a 3.0 kilograms backpack carried up the stairs.

b) If we know that [tex]m\cdot g = 650\,N[/tex], [tex]z_{o} = 4.1\,m[/tex] and [tex]z_{f} = 0\,m[/tex], then the change in potential energy is:

[tex]\Delta U_{g} = (650\,N)\cdot (0\,m-4.1\,m)[/tex]

[tex]\Delta U_{g} = -2665\,J[/tex]

The change in potential energy of a persona with weight 650 newtons that descends the stairs is -2665 joules.

Answer:

I Believe it is

Option C (The particles move in a choreograph path and do not collide)

Explanation:

Hope this Helps! :)

Answer:

The sound travelled 516 meters before bouncing off a cliff.

Explanation:

The sound is an example of mechanical wave, which means that it needs a medium to propagate itself at constant speed. The time needed to hear the echo is equal to twice the height of the canyon divided by the velocity of sound. In addition, the speed of sound through the air at a temperature of 20 ºC is approximately 344 meters per second. Then, the height of the canyon can be derived from the following kinematic formula:

[tex]2\cdot h = v\cdot t[/tex] (1)

Where:

[tex]h[/tex] - Height, measured in meters.

[tex]v[/tex] - Velocity of sound, measured in meters per second.

[tex]t[/tex] - Time, measured in seconds.

If we know that  [tex]v = 344\,\frac{m}{s}[/tex] and [tex]t = 3\,s[/tex], then the height of the canyon is:

[tex]h = \frac{v\cdot t}{2}[/tex]

[tex]h = \frac{\left(344\,\frac{m}{s} \right)\cdot (3\,s)}{2}[/tex]

[tex]h = 516\,m[/tex]

The sound travelled 516 meters before bouncing off a cliff.

Answer:

The voltage drop across the bulb is 115 V

Explanation:

The voltage drop equation is given by:

[tex]V=\frac{\Delta W}{\Delta q}[/tex]

Where:

ΔW is the total work done (4.6kJ)

Δq is the total charge

We need to use the definition of electric current to find Δq

[tex]I=\frac{\Delta q}{\Delta t}[/tex]

Where:

I is the current (2 A)

Δt is the time (20 s)

[tex]2=\frac{\Delta q}{20}[/tex]

[tex]q=40 C[/tex]

Then, we can put this value of charge in the voltage equation.

[tex]V=\frac{4600}{40}=115 V[/tex]

Therefore, the voltage drop across the bulb is 115 V.

I hope it helps you!

Answer:

The maximum height reached by the rocket at the given time is 377.5 m.

Explanation:

Given;

mass of the rocket, m = 500 g = 0.5 kg

weight of the rocket, W = 4.9 N

Applied force or thrust of the rocket, F = 20 N

time of the rocket motion, t = 5 s

Apply Newton's second law of motion;

Applied force = Weight of the rock + Upward force of the rocket

F = W + ma

where;

a is the upward acceleration of the rock

[tex]a = \frac{F-W}{m} \\\\a = \frac{20 - 4.9}{0.5} \\\\a = 30.2 \ m/s^2[/tex]

The maximum height reached by the rock during the given time is calculated as;

h = ut + ¹/₂at²

h = 0 + ¹/₂at²

h = ¹/₂at²

h =  ¹/₂ (30.2)(5)²

h = 377.5 m

Therefore, the maximum height reached by the rocket at the given time is 377.5 m.

Answer:

This is false

Explanation:

This is why the answer to this question is false. If these types of objects (2 points connected) should pass through same sets of 3 points, irrespective of the order that each object was plotted, we will not get identical shapes created.

The shape that is going to be created will be dependent on the pattern/order that was involved in the plotting. If it was identical, then we will have identical shapes. But if the order during plotting is different then we will have different shapes created.

Thank you!

Answer:

YOU CAN SNEEZE YOUR WAY TO A RIB FRACTURE.

Explanation:

Answer:

The current increases.

Explanation:

A capacitor can be defined as an electronic component used in electrical circuits to store charge temporarily.

A capacitor is connected to an AC generator. As the generator's frequency is increased, the current in the capacitor increases as well.

This ultimately implies that, when a capacitor is connected to an AC generator, the frequency of the circuit is directly proportional to the amount of current flowing through it.

Answer:

[tex]\triangle v=1.57*10^-^3^5miles/hour[/tex]

Explanation:

From the question we are told that

Mass of of automobile M= 1500 kg

Generally the equation of the uncertainty principle is  given by

[tex]\triangle p=\frac{h}{ \triangle x}[/tex]

[tex]\triangle p=\frac{1.054*10^-^3^4}{ 10^-^2}[/tex]

[tex]\triangle p=1.054*10^-^3^2[/tex]

Generally the uncertainty in velocity is mathematically given by

[tex]\triangle v=\frac{\traingle p}{m}[/tex]

[tex]\triangle v=\frac{1.054*10^-^3^2}{1500}[/tex]

[tex]\triangle v=7*10^-^3^6m/s[/tex]

Therefore the minimum uncertainty in the velocity (in miles per hour)

[tex]\triangle v=7*10^-^3^6*\frac{3600}{1609.3}[/tex]

[tex]\triangle v=1.57*10^-^3^5miles/hour[/tex]

Answer:

mechanical weathering

Explanation:

Answer:

Mechanical weathering is responsible for the composition of a rock

Explanation:

The answer is (D)

Answer:

F=ma

=12×10

120 N.........

Answer:

F = 120 N [Newtons]

Explanation:

F = 120N

If the speed is 10m/s² [an acceleration], and the mass is 12 kg [kilograms].

F [Force] = ma [mass × acceleration].

F = 10 × 12 = 120.

It cannot be a velocity because time is not given.

Momentum would be the velocity times mass. p = mv.

Answer:

31.905 ft/s²

Explanation:

Given that

Mass of the pilot, m = 120 lb

Weight of the pilot, w = 119 lbf

Acceleration due to gravity, g = 32.05 ft/s²

Local acceleration of gravity of found by using the relation

Weight in lbf = Mass in lb * (local acceleration/32.174 lbft/s²)

119 = 120 * a/32. 174

119 * 32.174 = 120a

a = 3828.706 / 120

a = 31.905 ft/s²

Therefore, the local acceleration due to gravity at that elevation is 31.905 ft/s²