3 years ago

By how many times will the kinetic energy of a body increases if its speed is trippled? Show by calculation.

Physics

1 answer:

Lemur [1.5K]3 years ago

4 0

Answer:

6 times

Explanation:

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3 years ago

A package of aluminum foil contains 50. ft2 of foil, which weighs approximately 6.0 oz. Aluminum has a density of 2.70 g/cm3. Wh

SIZIF [17.4K]

Answer:

1.36 x 10^-3 cm

Explanation:

Area = 50 ft^2 = 46451.5 cm^2

mass = 6 oz = 170.097 g

density = 2.70 g/cm^3

Let t be the thickness of foil in cm.

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mass = area x thickness x density

170.097 = 46451.5 x t x 2.70

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We know, P = F . ΔV

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2 years ago

The world's most powerful laser is the LFEX laser in Japan. It can produce a 2 petawatt(2×10^15W) laser pulse that last for 1 ps

kogti [31]

Answer:

$2.82942\times 10^{24}\ W\m^2$

Explanation:

d = Diameter of spot = 30 μm

r = Radius of spot = $\frac{d}{2}=\frac{30}{2}=15\ mu m$

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A = Area = $\pi r^2$

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$I=\frac{P}{A}\\\Rightarrow I=\frac{2\times 10^{15}}{\pi\times (15\times 10^{-6})^2}\\\Rightarrow I=2.82942\times 10^{24}\ W/m^2$

The light intensity within this spot is $2.82942\times 10^{24}\ W/m^2$

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3 years ago

By how many times will the kinetic energy of a body increases if its speed is trippled? Show by calculation.​

By how many times will the kinetic energy of a body increases if its speed is trippled? Show by calculation.