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3 years ago

12

What increase in temperature is needed to increase the length of an aluminum meterstick by 1.0 mm?

1 answer:

Fudgin [204]3 years ago

4 0

Answer:

42k

Explanation:

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Calculate the electrostatic force between two protons separated by a distance of 0.90 m

cluponka [151]

Use F = (9x10^9 x 1.6x10^-19x 1.6x10^-19) / (0.9 x 0.9)

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3 years ago

A box is pushed 40 m by amover. The amount of work done was 2,240 j. How much force was exerted on the box?

Serga [27]

56 Newtons bc w=F×D so if you divide by D on both side you get w/D=F

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3 years ago

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What is the wavelength of an earthquake wave if it has a speed of 9 km/s and a frequency of 2 Hz?

ira [324]

<span>2.56 sec (t=1/0.39)
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3 years ago

A jet engine gets its thrust by taking in air, heating and compressing it, and

nadya68 [22]

Answer:

$F=ma=20\ Kg\ 400\ m/s^2=8,000\ Nw$

Explanation:

Thrust is known as a reaction force which appears when a system expels or accelerates mass in one specific direction. If we know the acceleration and the mass of the air expelled by the jet engine, we can compute the thrust .

The acceleration is calculated by using the dynamics formula

$\displaystyle a=\frac{v_f-v_o}{t}$

The values are

$v_f=500\ m/s,\ v_o=100\ m/s,\ t=1\ sec$

$\displaystyle a=\frac{500-100}{1}=400\ m/s^2$

The thrust is

$F=ma=20\ Kg\ 400\ m/s^2=8,000\ Nw$

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3 years ago

Darw a velocity time graph for body moving with uniform acceleration

Troyanec [42]

Answer:

constant gradient rising

Explanation:

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2 years ago