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3 years ago

6

I don’t need help on the actual question itself. I’m just confused as to what it’s asking. Am I supposed to give evidence for cl

imate change or give evidence that opposes climate change?

1 answer:

GalinKa [24]3 years ago

4 0

Answer:

Understand what the video is telling you, then go off on that information and agree with the video.

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A horizontal force of 400 N is exerted on a 2.0-kg ball as it rotates (at

frutty [35]

Answer:

the speed of the ball is 10 m/s

Explanation:

Given;

magnitude of exerted force, F = 400 N

mass of the ball, m = 2 kg

radius of the circle, r = 0.5

The speed of the ball is calculated by applying centripetal force formula;

$F = \frac{mv^2}{r} \\\\v^2 = \frac{Fr}{m}\\\\v = \sqrt{\frac{Fr}{m}}\\\\ v = \sqrt{\frac{400*0.5}{2}}\\\\v = 10 \ m/s$

Therefore, the speed of the ball is 10 m/s

6 0

4 years ago

Read 2 more answers

As a box slides down a ramp, friction does 23.0 joules of work. At the bottom of the ramp, the box has 3.8 joules of kinetic ene

tensa zangetsu [6.8K]

Answer:

The high of the ramp is 2.81[m]

Explanation:

This is a problem where it applies energy conservation, that is part of the potential energy as it descends the block is transformed into kinetic energy.

If the bottom of the ramp is taken as a potential energy reference point, this point will have a potential energy value equal to zero.

We can find the mass of the box using the kinetic energy and the speed of the box at the bottom of the ramp.

$E_{k}=0.5*m*v^{2}\\\\where:\\E_{k}=3.8[J]\\v = 2.8[m/s]\\m=\frac{E_{k}}{0.5*v^{2} } \\m=\frac{3.8}{0.5*2.8^{2} } \\m=0.969[kg]$

Now applying the energy conservation theorem which tells us that the initial kinetic energy plus the work done and the potential energy is equal to the final kinetic energy of the body, we propose the following equation.

$E_{p}+W_{f}=E_{k}\\where:\\E_{p}= potential energy [J]\\W_{f}=23[J]\\E_{k}=3.8[J]\\$

And therefore

$m*g*h + W_{f}=3.8\\ 0.969*9.81*h - 23= 3.8\\h = \frac{23+3.8}{0.969*9.81}\\ h = 2.81[m]$

8 0

3 years ago

jolli1 [7]

Answer: PAPPER:D

Explanation:IM THE MYSTERY MAN WHOOSH??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

7 0

3 years ago

A wave has a wavelength of 8 mm and a frequency of 4 hertz. What is its speed?

Valentin [98]

Remember that the speed of a wave is the product of both the wavelength and the frequency of the wave.

First convert the units to m and then multiply the values to calculate its propagation or wave speed.

C = lambda • frequency.

3 0

3 years ago

Read 2 more answers

A jet airliner moving initially at 504 mph (with respect to the ground) to the east moves into a region where the wind is blowin

adelina 88 [10]

Answer

given,

intial velocity = 504 mph

wind speed = 219 mph

at an angle of 29◦

from the data

The resultant velocity =

$V = V_x \hat{i} + V_y\hat{j}$

$V = (504 + 219 cos 29^0 ) \hat{i} +(219 sin 29^0 )\hat{j}$

$V = 695.54\hat{i} + 106.17 \hat{j}$

the magnitude of velocity

$V = \sqrt{695.54^2+106.17^2}$

V = 703.59 m/s

direction

tan θ = $\dfrac{106.17}{695.54}$

θ = 8.676°

8 0

4 years ago