3.) Brady walks 5 meters forward, turns right, walks 25 meters, turns right again, walks 5
meters, then turns left and walks 10 meters. What are Brady's distance and
displacement?

Answer:

7200J

Explanation:

you have to find 90 percent of 8000 J to find total efficiency

Answer:

[tex]W=-0.501075J \approx -0.5J[/tex]

Explanation:

From the question we are told that

Mass of block [tex]M=0.425kg[/tex]

Radius of circle [tex]r=0.525m[/tex]

Force  of track [tex]F_t=4.05N[/tex]

Normal Force on block[tex]F_n=0.660[/tex]

Generally the equation for Velocity of block is mathematically Given by the law of conservation of energy

[tex]4.05=(0.425kg*9.8)+(0.425kg*v^2)/0.525[/tex]

[tex]v=\sqrt{\frac{0.525*(4.05-(0.0425*9.8)}{0.0425} }[/tex]

[tex]V=-6.69 \approx 7m/s[/tex]

For initial velocity

0.660 = 0.0425 x u^2/0.525 - 0.0425 x 9.8

[tex]v=\sqrt{0.525*\frac{(0.660+(0.0425*9.8)}{0.0425} }[/tex]

[tex]V=-3.646 \approx 4m/s[/tex]

Generally the equation for work done is mathematically Given by

[tex]Wf=(0.5mu^2 - 0.5mv^2) -mg(2R)[/tex]

[tex]Wf=(0.5(0.0425)(4) - 0.5(0.0425)(7) -(0.0425)(9.8)(2*0.525)[/tex]

[tex]W=-0.501075J \approx -0.5J[/tex]

Answer:

[tex]t =4.8sec[/tex]

Explanation:

From the question we are told that

Velocity of speed boat [tex]V=29.0m/s[/tex]

Distance to Marker [tex]d=100[/tex]

Acceleration of [tex]a=-3.4m/s^2[/tex]

Generally the Newtons 3rd motion equation is given as

 [tex]v^2 = u^2 + 2 * a* s[/tex]

 [tex]v^2 = 29^2 + 2 * -3.4* 100[/tex]

 [tex]v = \sqrt{161}[/tex]

 [tex]v=12.68m/s[/tex]

Generally the Newton's first equation of motion is given as

 [tex]v = u + a*t[/tex]

 [tex]12.68 = 29 -3.4*t[/tex]

 [tex]12.68-29 = -3.4t[/tex]

 [tex]-16.32 = -3.4t[/tex]

 [tex]t =\frac{-16.32}{-3.4}[/tex]

 [tex]t =4.8sec[/tex] .

Answer:

false

Explanation:

If the net work done on an object is zero, it follows that its change in kinetic energy is also zero. Therefore, its speed remains the same.

I think the answer is false

Answer:

opaque = 4

malleable = 3

ductile = 2

lustrous (or whatever the bottom word is) = 1

Explanation:

Answer:

$383

0.0255

4.83

Explanation:

We're asked to find the total fuel consumed over distance traveled and the cost of given fuel.

To start with, we convert Euro value to USD

Total distance traveled is 5000 km

Average fuel consumption is 6 ltr per 100 km = 0.06 ltr/km

Average fuel cost is 1.063 EUR/ltr

We're going to use a flat rate of 1 EUR to USD = 1.2 USD

To get the total fuel consumption, we use the formula

Total fuel consumption = total distance * average fuel consumption

Total fuel consumption = 5000 km * 0.06 ltr/km

Total fuel consumption = 300 ltr

Finding the total fuel cost, we use the formula

Total fuel cost = total fuel consumption * average fuel cost

Total fuel cost = 300 ltr * 1.063 EUR/ltr

Total fuel cost = 318.9 EUR

Total fuel cost in USD then is, 318.9 EUR × 1.2 USD/EUR

Total fuel cost = 383 USD

b

To convert given fuel consumption to mile per km

Average fuel consumption is 0.06 ltr/km

Conversion rate of Ltr to gal is 1 ltr = 0.264 gal/ltr

Conversion of Km to mile is 1 km = 0.621 mile/km

Going forward, the Average fuel consumption = 0.06 ltr/km * 0.264 gal/ltr ÷ 0.621 mile/km

Average fuel consumption = 0.01584 / 0.621

Average fuel consumption = 0.0255 gal/km

c) to convert given cost of fuel to USD/gal, we say

Average fuel cost is 1.063 EUR/ltr

We'd already stated that the following rates

EUR to USD = 1.2 USD/EUR

Ltr to gal = 0.264 gal/ltr

Average fuel cost = 1.063 EUR/ltr * 1.2 USD/EUR ÷ 0.264 gal/ltr

Average fuel cost = 1.2756 / 0.264

Average fuel cost = 4.83 USD/gal

Explanation:

Vectors are quantities that has both magnitude and direction. A vector is described in terms of quantity and the direction it is headed.

There are different forms of vectors that are used in our daily life.

Answer:

[tex]D=29.7648m[/tex]

Explanation:

From the question we are told that

Speed of the particle[tex]V=0.624c[/tex]

Lifetime [tex]t=159ns[/tex]

Generally the equation for distance is mathematically given by

[tex]D=Vt[/tex]

[tex]D=0.624c*159*10^-^9[/tex]

[tex]D=0.624*3*10^8*159*10^-^9[/tex]

[tex]D=29.7648m[/tex]

Therefore the markers are [tex]D=29.7648m[/tex] apart

Answer:

F = 482.51 N

Explanation:

Given that,

Mass of a child, m = 22 kg

Angular velocity of the merry-go-round, [tex]\omega=40\ rev/min[/tex]

Let the radius of the path, r = 1.25 m

We need to find the centripetal force acting on the child. The formula for the centripetal force is given by :

[tex]F=m\omega^2r\\\\=22\times (4.18879)^2\times 1.25\\\\=482.51\ N[/tex]

So, the required centripetal force is 482.51 N.

Answer:

432 years

Explanation:

the half life of americium-241 is approx. 432 years, and the half life means the time it takes for half of the atoms to decay. hope this helps!

Answer:

m = 327.07 kg

Explanation:

Given that,

Kinetic energy of a motorcycle, E = 57800 J

Velocity of the motorcycle, v = 18.8 m/s

We need to find the mass of the motorcycle. The kinetic energy of an object is given by :

[tex]E=\dfrac{1}{2}mv^2[/tex]

m is mass

[tex]m=\dfrac{2E}{v^2}\\\\m=\dfrac{2\times 57800 }{(18.8)^2}\\\\m=327.07\ kg[/tex]

So, the mass of the motorcycle is 327.07 kg.

Answer:

14 m/s

Explanation:

Step One:

Given data:

mass of automobile m= 1700kg

Force F= 170,000 N

time t= 0.14s

v= ??

Required

The velocity of the car

Step two:

From the expression given below, we can find the velocity

Ft= mv

make v subject of the formula

v= Ft/m

v= 170000*0.14/1700

v=23800/1700

v=14 m/s

George burnt his fingertips so badly that he can't feel anything with them anymore, then the papillary layer part of his skin must have been damaged, therefore the correct answer is option A.

It can be defined as the form of the energy in which heat is transferred from one body to another body due to their molecular movements, thermal energy is also known as heat energy.

As given in the problem George burnt his fingertips so badly that he can't feel anything with them anymore.

Option A is the appropriate response since George must have injured the papillary layer of his skin if his fingertips were burned so badly that he can no longer feel anything with them.

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Answer:

If the velocity is constant there is no friction it will equal to zero. It is Fn=Ff

Explanation:

Answer number four because it is one of the factors evaluating science

Answer:

attached below

Explanation:

Gravitational potential

energy = [tex]- \frac{GmM}{r}[/tex] ,

V ∝ [tex]- \frac{1}{r}[/tex]  

attached below is a graph that represents the gravitational potential energy U

Gravitational potential energy is the energy held in an entity as a result of its vertical position or length. This gravitational pull of a planet on an object causes the information to be stored.

This is connected with gravitational pull since it takes work to lift anything against the gravity of the Earth.

Freshwater in a raised lake or kept behind a dam demonstrates gravitational force.

According to the formula:

Gravitational potential energy [tex]\bold{=-\frac{GMm}{r^2}}[/tex]

Therefore

[tex]\to \bold{V \propto -\frac{1}{r}}[/tex]

Therefore, the answer is "Option d"

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Answer:

C-How much matter is in an object

Explanation:

Answer: the acceleration of the truck a_t is 0.6911 m/s²

Explanation:

Given the data in the question;

There is no external force on the system; net force on the system is 0

Mass of the truck with the woman M = 1767 kg + 41 kg = 1808 kg

mass of the car m = 833 kg

car acceleration a_c = 1.5 m/s²

now let a_t be the acceleration of the truck in opposite direction

Action force on the car = Reaction force on the car

ma_c = Ma_t

a_t = ma_c / M

we substitute

a_t = (833 × 1.5) / 1808

a_t = 1249.5 / 1808

a_t = 0.6911 m/s²    

Therefore, the acceleration of the truck a_t is 0.6911 m/s²

Answer:

The maximum velocity and maximum acceleration of the particle are approximately 12.566 inches per second and 789.568 inches per square second.

Explanation:

The equation of motion for the position of a particle experimentating a simple harmonic motion ([tex]x(t)[/tex]), measured in inches, is described by the following expression:

[tex]x(t) = A\cdot \cos \left(\frac{2\pi\cdot t}{T} +\phi\right)[/tex] (1)

Where:

[tex]A[/tex] - Amplitude, measured in inches.

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

[tex]T[/tex] - Period, measured in seconds.

[tex]\phi[/tex] - Phase, measured in radians.

Then, we obtain the formulas for the velocity and acceleration of the particle by differentiating (1):

[tex]v(t) = -\frac{2\pi\cdot A}{T}\cdot \sin \left(\frac{2\pi\cdot t}{T}+\phi \right)[/tex] (2)

[tex]a(t) = -\left(\frac{2\pi}{T} \right)^{2}\cdot A\cdot \cos \left(\frac{2\pi\cdot t}{T}+\phi \right)[/tex] (3)

From (2) and (3) we find that maximum velocity ([tex]v_{max}[/tex]), measured in inches per second, and maximum acceleration ([tex]a_{max}[/tex]), measured in inches per square second, are defined by the following formulas:

[tex]v_{max} = \frac{2\pi\cdot A}{T}[/tex] (4)

[tex]a_{max} = \left(\frac{2\pi}{T} \right)^{2}\cdot A[/tex] (5)

If we know that [tex]A = 0.2\,in[/tex] and [tex]T = 0.1\,s[/tex], then the maximum velocity and maximum acceleration of the particle are, respectively:

[tex]v_{max} = \frac{2\pi\cdot (0.2\,in)}{0.1\,s}[/tex]

[tex]v_{max} \approx 12.566\,\frac{in}{s}[/tex]

[tex]a_{max} = \left(\frac{2\pi}{0.1\,s} \right)^{2}\cdot (0.2\,in)[/tex]

[tex]a_{max} \approx 789.568\,\frac{in}{s^{2}}[/tex]

The maximum velocity and maximum acceleration of the particle are approximately 12.566 inches per second and 789.568 inches per square second.

When an object executes a to and fro motion is said to be a simple harmonic motion. The maximum velocity and maximum acceleration of the particle will be 12.566 in/s and 789.568  in/s².

When an object executes a to and fro motion in the definite plane when it is tied with the string. The type of motion will be the simple harmonic motion.

Simple harmonic motion is a form of periodic motion in mechanics and physics in which the restoring force on the moving item is directly proportional to the size of the object.

The value of maximum velocity is given by the formula in the SHM motion is

[tex]\rm V_{max = \frac{2\pi A}{T}[/tex]

[tex]\rm V_{max} = \frac{2\times 3.14 \times 0.2 }{0.1}[/tex]

[tex]\rm V_{max = 12.566 \;in/sec[/tex]

The value of maximum acceleration is given by the formula in the SHM motion is

[tex]\rm a_{max}=(\frac{2\pi}{T} )^2.A\\\\ \rm a_{max}=(\frac{2\times 3.14 }{0.1} )^2 \times 0.2 \\\\ \rm a_{max}=789.568\; in/sec^2[/tex]

Hence the maximum velocity and maximum acceleration of the particle will be 12.566 in/s and 789.568  in/s²

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Answer: 140 pounds

Explanation:

Weight on an object on Earth is different from other bodies in space due to the gravity acting on the object.

Gravity on Earth is 9.80665 m/s². A kg on earth is therefore 9.80665 newtons (N).

With a weight of 623, the mass of the reindeer is:

= 623 / 9.80665

= 63.52832 kg

Converting to pounds:

A kilogram is about 2.20462 pounds:

= 63.52832 * 2.20462

= 140 pounds

Answer:

Increasing speed.

Explanation:

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.

Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.

Mathematically, acceleration is given by the equation;

[tex]Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}[/tex]

In this scenario, an object moves with a positive acceleration. Thus, the object is moving with an increasing speed and as such it has acceleration in the same direction as its velocity with respect to time.

Answer:

The meaning of work is a force that acts on an object and the object moves in respond and the meaning of power is how much work is done in a given amount of time. The two terms are related by is that power is the rate of doing work.

Explanation:

Answer:

Explanation:

Sexual reproduction is when a male and female have sexual inter course an and produce sex cells. A males sex cell is the sperm and the Females sex cell is the ova or egg cells.

Answer:

100 joules

Explanation:

you cant use this all the time to solve it all the time but 50x2 is 100

A person lifts a book 2 meters off the ground using 50 n of force how much work was done was 100 joules.

When an object is moved across a specific distance by an external force, work is the quantity of energy that is transmitted to the object.

The quantity of energy transmitted to an object through work is referred to as the work done on the thing.

Force on and displacement of the object are the two basic parts of work done on an object. For a force to exert its force along an object's path of motion, the object must be moved along that path. The units of measurement for work, force, and displacement are joules, newtons, and meters, respectively.

Therefore,  A person lifts a book 2 meters off the ground using 50 n of force how much work was done was 100 joules.

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Answer:

θ = 20.9 rad

Explanation:

In a blender after a short period of acceleration the blade is kept at a constant angular velocity, for which we can use the relationship

           w = θ / t

           θ = w t

if we know the value of the angular velocity we can find the angular position, we must remember that all the angles must be in radians

suppose that the angular velocity is w = 10 rpm, let us reduce to the SI system

          w = 10 rpm [tex](\frac{2\pi rad}{1 rev}) ( \frac{1 min}{60 s} )[/tex]

= 1,047 rads

let's calculate

          θ = 1,047 20

          θ = 20.9 rad

Answer:

Explanation:

The formula for variation in the value of g due to height h is given by the following relation .

g₁ = g₀ ( 1 - h / R )

g₁ and  g₀ are value of acceleration due to gravity at height h from surface and at surface and  R is radius of the earth .

R = 6370 km , h = 489 km ( given )

g₁ = g₀ ( 1 - 489 / 6370 )

= .923 g₀

g₁ in percent terms = .923 x 100

= 92.3 % .

Answer:

California has one of the most variable climates of any U.S state, and often experiences very wet years followed by extremely dry ones . The state's reservoirs have insufficient capacity to balance the water supply between wet and dry years

Explanation:

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Answer:

I think a is the right not clear but

Answer:

[tex]F=1.95\times 10^{20}\ N[/tex]

Explanation:

Mass of Earth, [tex]m_e=5.98 \times 10^{24}\ kg[/tex]

Mass of Moon, [tex]m_m=7.26\times 10^{22}\ kg[/tex]

The distance between Earth and the Moon is, [tex]d=384,400\ km[/tex]

We need to find the force of gravitational attraction between the Earth and the moon. The force of gravity is given by :

[tex]F=G\dfrac{m_em_m}{r^2}\\\\F=6.67\times 10^{-11}\times \dfrac{5.98 \times 10^{24}\times 7.26\times 10^{22}}{(384400 \times 10^3)^2}\\\\F=1.95\times 10^{20}\ N[/tex]

So, the required force is [tex]1.95\times 10^{20}\ N[/tex].