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3 years ago

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What is light energy

1 answer:

Oliga [24]3 years ago

8 0

Light energy is defined as how nature moves energy at an extremely rapid rate, and it makes up about 99% of the body's atoms and cells, and signal all body parts to carry out their respective tasks. An example of light energy is the movement of a radio signal.

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_______ occurs when a body’s molecular wavelength sends vibrations to another body, resulting in the production of another sound

Vikki [24]

The answer is Resonance. Think of the bass on a speaker and if you place a glass of water onto a table or flat surface, it will start to vibrate/ shake because of the musics beats bass.

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3 years ago

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The boom of a fire truck raises a fireman (and his equipment – total weight 280 lbs) 60 ft into the air to fight a building fire

Simora [160]

Explanation:

Given that,

Weight = 280 lbs

Height = 60 ft

Power = 3.50 hp

(a). We need to calculate the work done by the boom on the fireman

Using formula of work done

$Work\ done =Weight\ \times height$

$W'=W\times h$

Put the value into the formula

$W'=280\times60$

$W'= 16800 ftlbf$

$W'=\dfrac{16800}{778.169}$

$W'=21.59\ Btu$

The work done by the boom is 21.59 Btu.

(b). We know that,

1 hp = 550 ft lbf

So, $P = 3.50\times550$

$P=1925\ ft-lbf/s$

We need to calculate the time

Using formula of time

$t = \dfrac{W}{P}$

Put the value into the formula

$t=\dfrac{16800}{1925}$

$t =8.7\ sec$

The time is 8.7 sec.

Hence, This is the required solution.

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3 years ago

What is the purpose of the antireflective coating on the glass layer of a solar

gizmo_the_mogwai [7]

Answer:

I think d. is the answer I'm not conform

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2 years ago

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A completely inelastic collision occurs between two balls of wet putty that move directly toward each other along a vertical axi

nexus9112 [7]

Answer:

$y=2.64m$

Explanation:

Given data

Ball one

mass m₁=3.0kg

velocity v₁=20 m/s

Ball second

mass m₂=2.0 kg

velocity v₂=12 m/s

First we need the speed of combined ball.Since the system conserves the linear momentum

$p_{i}=p_{f}\\m_{1}v_{1}+m_{2}v_{2}=m_{t}v_{t}$

So the combined velocity vt is:

$v_{t}=\frac{m_{1}v_{1}+m_{2}v_{2}}{m_{t}}\\$

Since the two balls 1 and 2 are moving in opposite direction

So

$v_{t}=\frac{m_{1}v_{1}-m_{2}v_{2}}{m_{t}}\\$

Substitute the given values

$v_{t}=\frac{(3kg)(20m/s)-(2kg)(12m/s)}{(3+2)kg}\\ v_{t}=7.2 m/s$

We have the equation for motion with constant acceleration is given by:

$v^2=v_{o}^2+2g(y-y_{o})\\$

At initial position y₀=0 and vt=v-v₀

So

$v^{2}=v_{o}^2+2g(y-0)\\ y=\frac{v^2-v_{o}^2}{2g}\\ y=\frac{v_{t}^2}{2g}\\ y=\frac{(7.2m/s)^2}{2(9.8m/s^2)}\\ y=2.64m$

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3 years ago

Jamie is writing a literary essay that examines the connection between a short story’s theme of deprivation and the author’s imp

likoan [24]

A thesis statement..........

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2 years ago

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