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3 years ago

If a liter of water is heated from 20 C to 50 C, what happens to its volume?

Physics

1 answer:

iragen [17]3 years ago

5 0

Answer:

The volume increases

Choice B is correct

Explanation:

If a liter of water is heated from 20 C to 50 C its volume will increase.

Matter exists in 3 states;

Solids

Liquids

Gases

Matter expands when heated, consequently occupying more space. This implies that volume will increase

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A rocket blast off and moves away from the earth. How is the rocket affected by the earth's gravitational pull as it gets furthe

Yuki888 [10]

Gravitational forces between two objects decrease as the objects
get farther apart.

That's a big part of the reason why the Earth attracts us with more
force than Jupiter does.

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4 years ago

Read 2 more answers

Which of the following diagrams best represents the gravitational force W. the frictional force f, and the normal force N that a

mojhsa [17]

It's D.

Weight always points downward.

The normal force always points perpendicular to the surface.

Friction opposes motion, so it points in the direction opposite the direction in which the block is moving.

3 0

3 years ago

A 1.20 m wire has a mass of 6.80 g and is under a tension of 120 N. The wire is held rigidly at both ends and set into oscillati

swat32

Answer:

145.52137 m/s

1.4 m

0.7 m

60.6339 Hz

121.2678 Hz

Explanation:

T = Tension = 120 N

$\mu$ = Linear density = $\frac{m}{L}$

m = Mass of wire = 6.8 g

L = Length of wire = 1.2 m

n = Number of loops

Velocity is given by

$v=\sqrt{\frac{T}{\mu}}\\\Rightarrow v=\sqrt{\frac{T}{\frac{m}{L}}}\\\Rightarrow v=\sqrt{\frac{120}{\frac{6.8\times 10^{-3}}{1.2}}}\\\Rightarrow v=145.52137\ m/s$

The speed of waves on the wire is 145.52137 m/s

Wavelength is given by

$\lambda=\frac{2L}{n}\\\Rightarrow \lambda=\frac{2\times 1.2}{1}\\\Rightarrow \lambda=1.4\ m$

The wavelength of the waves that produces one-loop standing waves is 1.4 m

$\lambda=\frac{2L}{n}\\\Rightarrow \lambda=\frac{2\times 1.2}{2}\\\Rightarrow \lambda=0.7\ m$

The wavelength of the waves that produces two-loop standing waves is 0.7 m

Frequency is given by

$f=\frac{nv}{2L}\\\Rightarrow f=\frac{1\times 145.52137}{2\times 1.2}\\\Rightarrow f=60.6339\ Hz$

The frequency of the waves that produces one-loop standing waves is 60.6339 Hz

$f=\frac{nv}{2L}\\\Rightarrow f=\frac{2\times 145.52137}{2\times 1.2}\\\Rightarrow f=121.2678\ Hz$

The frequency of the waves that produces two-loop standing waves is 121.2678 Hz

4 0

3 years ago

In a skating stunt known as "crack-the-whip," a number of skaters hold hands and form a straight line. They try to skate so that

4vir4ik [10]

Answer:

The magnitude of the centripetal force that acts on him

Explanation:

Given that,

Mass = 80.0 kg

Distance = 6.10 m

Speed = 6.80 m/s

We need to calculate the magnitude of the centripetal force that acts on him

Using formula of the centripetal force

$F_{c}=\dfrac{mv^2}{r}$

Where, F = force

m = mass

v = speed

r = distance

Put the value into the formula

$F_{c}=\dfrac{80.0\times(6.80)^2}{6.10}$

$F_{c}=606.4\ N$

Hence, The magnitude of the centripetal force that acts on him

7 0

3 years ago

Which colors has a wavelength shorter than the others?

lana66690 [7]

Answer: blue, indigo and violet

Explanation: looking at the visible light spectrum, we have

R O Y G B I V

Where R = red , O = orange light, Y = yellow, G = green, B = blue, I = indigo and V = violet.

Towards the right of the spectrum is increasing frequency and energy which implies that red light has the least energy and frequency and violet has the highest energy and frequency.

Also along from left to right of spectrum is decreasing wavelength.

Hence red light has the highest lomgestvand violet has the shortest wavelength.

So we can conclude that the shades of blue that's blue, indigo and violet has the least wavelength.

6 0

3 years ago