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3 years ago

What is heat, and how does it affect the molecules in a substance?

Physics

1 answer:

DaniilM [7]3 years ago

8 0

Answer:

Heat is the form of energy which transfers from hotter body( high temperature) to colder body ( low temperature).

It increases the kinetic energy of molecules of the body.

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A mass is attached to an ideal spring. At time t = 0 the spring is at its natural length and the mass is given an initial veloci

JulijaS [17]

Answer:

t = T/4

Explanation:

The power delivered to the mass by the spring is work done by the spring per second.

$P = \frac{dW}{dt}$

The work done by the spring is equal to the elastic potential energy stored in the spring.

$U = \frac{1}{2}kx^2$

The maximum energy stored in the spring is at the amplitude of the oscillation.

$U_{max} =\frac{1}{2}kA^2$

So the first time the mass reaches to its amplitude can be found by the following equation of motion:

$x = A\cos(\omega t + \phi)\\\phi = \pi/2 ~because ~at ~t= 0, ~ x = 0\\0 = A\cos(0 + \pi/2)\\x = A\cos(\omega t + \pi/2)$

When the mass reaches the amplitude:

$A = A\cos(\omega t + \pi/2)\\1 = \cos(\omega t + \pi/2)\\\omega t + \pi/2 = \pi$

because cos(π) = 1.

$\omega t = \pi/2$

Using ω = 2π/T,

$\omega t = \pi/2\\\frac{2\pi}{T}t = \pi/2\\t = \frac{T}{4}$

4 0

4 years ago

A force of 34.5 newtons is applied to an object at an angle of 45 º with the horizontal. What is the force acting on the object

ddd [48]

The horizontal component of the force is 34.5 cos(45) = 24.4 newtons

The vertical component of the force is 34.5 sin(45) = 24.4 newtons

6 0

4 years ago

How do you find velocity

Valentin [98]

You can find velocity when acceleration is constant.

file example see below.

6 0

4 years ago

If a constant fotce of 490 newtons is applied to an object and it proceeds to accelerate in the opposjte direction at 9.8 meters

Sloan [31]

Answer:

50 kg

Explanation:

f=ma

Force = mass x acceleration

490 = 9.8 x m

m = 50 kg

8 0

3 years ago

What’s the net force of a box with 60n left and 20n right

natita [175]

Answer and Explanation:

There would be a net force of 40n going left, because 20n going right would cancel out the 20n in the 60n going left, making 40n go left.

<em><u>#teamtrees #PAW (Plant And Water)</u></em>

3 0

3 years ago