A mass of gas under constant pressure occupies a volume of 0.5 m3 at a temperature of 20°C. Using the formula for cubic expansion, what will be the volume at a temperature of 45°C without a change in pressure?

Answers

Answer 1
Answer: p1v1/t1 = p2v2/t2
p(0.5 m^3)/(20+273 K) = pv2/(45+273 K)
find v2

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A mass of 8 kg. moves at a rate of 14.3m/ sec. what is the KE developed by the mass
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Examples of the period, frequency, speed of a wave in a sentence?

Which of the following factors does NOT help determine the height, length, and period of a wave?a. wind speed
b. fetch
c. temperature
d. how long the wind blows

Answers

Answer:

Temperature does not determine the height, length and the period of the wave.

Explanation:

Height of the wave shows the amplitude, the length shows the wavelength, and the period of the wave shows the frequency.

The factors that helps to determine the height, length and the period of the wave are :

  • Wind speed : The speed is equal to the product of the wavelength and the frequency of the wave.
  • Fetch : It is defined as the horizontal distance where the wind blows.
  • How long the wind blows : It shows how long the wind blows. It is inversely proportional to the frequency of the wave.

Hence, the correct option is (c) " temperature ".  

Final answer:

The temperature, unlike the wind speed, fetch, and duration of wind blow, does not directly help determine the height, length, and period of a wave.

Explanation:

The height, length, and period of a wave are primarily determined by wind speed, the fetch (the distance over which the wind blows across the water surface), and the duration for which the wind blows. Temperature does not directly determine these characteristics of a wave. Therefore, option 'c' is the correct answer.

While temperature can affect the density and viscosity of the medium, and indirectly impact wave speed, it does not directly influence the height, length, and period of a wave in the same way as the other factors.

The factor that does NOT help determine the height, length, and period of a wave is c. temperature. Temperature does not have a direct influence on the characteristics of a wave. The other factors, such as wind speed, fetch, and how long the wind blows, all play a role in determining the properties of a wave.

Learn more about Wave Characteristics here:

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Oliver weighs 600. N. He climbs a flight of stairs that is 3.0 meters tall in 4.0 seconds.a. How much work did he do?
b. What was Oliver’s power in watts?

Answers

L=G·d
L=600N·3m=1800J
P=L/Δt=1800J/4s=450W

If a car goes five times as fast how much more kinetic energy will it have?

Answers


For that answer, we should take a second to look at the formula for kinetic energy:

                Kinetic Energy of an object = (mass) x (speed)² .

The important thing to notice is that the KE is proportional to the square of
the speed. So if you multiply the speed by some number, the KE changes
by the square of that number.

Multiplying the speed of the car by 5 gives it (5)² = 25 times as much KE.


the care will have 25 times as much kinetic energy as before

(PLEASE HELP) Identify the following as electromagnetic (E) or mechanical (M) waves.sound waves

water waves

radio waves

ultraviolet waves

waves in a wheat field

Answers

Answer;

Mechanical waves;

  • sound waves
  • waves in a wheat field
  • water waves

Electromagnetic waves

  • Radio waves
  • Ultraviolet

Explanation;

  • A wave is a transmission of a disturbance from one place, the source to another.
  • Waves can be classified as mechanical waves or electromagnetic waves depending on the requirement of a material medium.
  • Mechanical waves are those waves that require a material medium for transmission, they include, sound waves, water waves, etc. The transmission of these waves is by vibration of particles in the medium.
  • Electromagnetic waves are those waves that do not require a material medium for transmission.They include, radio waves, microwaves, and all the waves in the electromagnetic spectrum.

sound waves (m)

water waves (m)

radio waves (e)

ultraviolet (e)

waves in a wheat field (m)

Which situations contain unbalanced forces? Check all that apply.

Answers

Answer: A book falls to the floor.

A car skids to a stop.

A foam ball launches

Explanation:

Answer:

Explanation:

Without seeing the options i can tell you this:

A balanced force is equal on both sides

The friction would equal the force

The amount on the left (friction side) would equal the amount on right (force side)

Or the net force would equal zero

You should post the answer options for more help

A truck accelerates 2 m/s2 when it is empty. If the truck is filled so that it has twice the mass and the same amount of net force is applied, how much will the truck accelerate?8 m/s2
1 m/s2
4 m/s2
2 m/s2

Answers

Answer :

a = 1 m/s^2

Explanation:

Given information

Net force is a constant

The mass of the truck is m_(o)

Initial acceleration a_(o)= 2 m/s^(2)

The mass of the truck is increased twice as much

F_(net)= m_(o) a_(o) = ma

F_(net)= m_(o) a_(o) = 2m_(o)a

a=\frac{a_(o) } {2}

a = 2/2

a = 1 m/s^(2)

This is a conceptual problem, I’ll try to upload a picture: