3 years ago

What are objects that are less dense than water

Physics

1 answer:

GaryK [48]3 years ago

7 0

Answer:

Apples, empty bottles, balloons, etc.

Explanation:

The air is the cause of why these object are less dense than water.

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3 years ago

If each of the three rotor helicopter blades is 3.50 m long and has a mass of 120 kg , calculate the moment of inertia of the th

devlian [24]

Answer:

1470kgm²

Explanation:

The formula for expressing the moment of inertial is expressed as;

I = 1/3mr²

m is the mass of the body

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I = 3(1/3mr²)

I = mr²

Given

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r = 3.50m

Required

Moment of inertia

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I = 120(3.50)²

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Light with a wavelength of 400 nm strikes the surface of cesium in a photocell, and the maximum kinetic energy of the electrons

Firdavs [7]

Answer:

The longest wavelength of light that is capable of ejecting electrons from that metal is 1292 nm.

Explanation:

Given that,

Wavelength = 400 nm

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$E = \dfrac{hc}{\lambda}$

$\lambda=\dfrac{hc}{E}$

Put the value into the formula

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Hence, The longest wavelength of light that is capable of ejecting electrons from that metal is 1292 nm.

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Answer:

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Explanation:

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Explanation:

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