3 years ago

What are physical forms in which a substance can exist?

Physics

1 answer:

Alecsey [184]3 years ago

8 0

Physical forms are: gas,liquid,and solid

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irga5000 [103]

Answer:

eternal mangekyou sharingan

Explanation:

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3 years ago

How much force is needed to accelerate at 66 kg skier 4m/s^2 ?

Ray Of Light [21]

E force needed to accelerate a 68 kilogram-skier at a rate of
1.2
m
s
2
is 81.6 Net forces.
Explanation:
Take the mass(68kg) and the acceleration of the skier(
1.2
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3 years ago

What is the wavelength of red light in vacuum that has a frequency of 4.00 × 1014 hz?

Pachacha [2.7K]

Answer: $7.5(10)^{-7} m$

Explanation:

The frequency $\nu$ of an electromagnetic wave is given by the following equation:

$\nu=\frac{c}{\lambda}$

Where:

$c=3(10)^{8} m/s$ is the speed of light in vacuum

$\nu=4(10)^{14} Hz$ is the frequency of red light

$\lambda$ is the wavelength of red light

Isolating $\lambda$ :

$\lambda=\frac{c}{\nu}$

$\lambda=\frac{3(10)^{8} m/s}{4(10)^{14} Hz}$

Finally:

$\lambda=7.5(10)^{-7} m$

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3 years ago

11. A train car has the momentum of 50,000 kg*m/s and is moving at a velocity of 45 m/s what is

Monica [59]

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3 years ago

Read 2 more answers

A ball is kicked on a planet the size of Earth but with twice the acceleration due to gravity. If the maximum height of the ball

USPshnik [31]

Answer:

The value $t = 1.995 \ s$

Explanation:

From the question we are told that

The acceleration due to gravity is a = 2g

The maximum height is h= 39 m

Generally from the kinematic equation

$s = ut + \frac{1}{2} at^2$

Here u is the velocity of the ball at maximum height before it start falling and the value is 0 m/s

$39 = 0* t + \frac{1}{2} (2g)t^2$

$39 = (9.8)t^2$

$t = \sqrt{3.9795918}$

$t = 1.995 \ s$

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4 years ago