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2 years ago

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8.6 hours of daylight 8.6 hours of darkness

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Gelneren [198K]2 years ago

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Which term describes the increase in a material's volume due to an increase in temperature?

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Thermal Expansion. best describes the increase in a materials volume

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3 years ago

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Write the terms involved in s=ut+1\2

cricket20 [7]

s = displacement; u = initial velocity; t = time of motion

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3 years ago

As the train in the image moves to the right how does the train horn sound to person a?

alina1380 [7]

Answer:

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3 years ago

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A radar operates at a wavelength of 3 centimeters. what is the frequency of the these waves? the speed of light is 3 × 108 m/s .

aliya0001 [1]

We are given information:
λ $= wavelength = 3cm = 0.03m \\ 
c = speed of light = 3* 10^{8}m/s$

Formula that connects wavelength and frequency is:
$frequency= \frac{speed of light}{wavelength} \\ f= \frac{3* 10^{8}}{0.03} \\ f=1 * 10^{10} Hz = 10GHz$

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3 years ago

After the box comes to rest at position x₁, a person starts pushing the box, giving it a speed v₁. When the box reaches position

Vesna [10]

Answer:

$W_p = \frac{1}{2}mv_1^2$

Explanation:

As we know that box is initially at rest

So we will have

$v_i = 0$

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$v_f = v_1$

now we know by work energy theorem that work done by all the forces on the box will be equal to the change in kinetic energy

So here we will have

$W_p = \frac{1}{2}m(v_f^2 - v_i^2)$

$W_p = \frac{1}{2}m(v_1^2 - 0)$

$W_p = \frac{1}{2}mv_1^2$

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3 years ago