1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
garri49 [273]
3 years ago
13

What makes up the unit joules?​

Physics
1 answer:
nadya68 [22]3 years ago
6 0

Joule. Joule, unit of work or energy in the International System of Units (SI); it is equal to the work done by a force of one newton acting through one metre. Named in honour of the English physicist James Prescott Joule, it equals 107 ergs, or approximately 0.7377 foot-pounds

One joule is defined as the amount of energy exerted when a force of one newton is applied over a displacement of one meter. One joule is the equivalent of one watt of power radiated or dissipated for one second. In some applications, the British thermal unit (Btu) is used to express energy.

The joule has base units of kg·m²/s² = N·m. A joule is defined as the work done or energy required to exert a force of one newton for a distance of one metre

n equation form: work (joules) = force (newtons) x distance (meters), where a joule is the unit of work, as defined in the following paragraph. In practical terms, even a small force can do a lot of work if it is exerted over a long distance.

Multiply watts by seconds to get joules.

A 1 Watt device consumes 1 Joule of energy every 1 second. If you multiply the number of watts by the number of seconds, you'll end up with joules. To find out how much energy a 60W light bulb consumes in 120 seconds, simply multiply (60 watts) x (120 seconds) = 7200 Joules.

You might be interested in
A force on a toy airplane exerted a work of 100 J. What was the change in the kinetic energy?
klemol [59]

Answer:

it probs gos fast then it was it would be easy if u asked us if their was any mass or friton

Explanation:

7 0
3 years ago
In which one of the following circumstances could mechanical energy not possibly be conserved, even if friction and air resistan
qwelly [4]

Answer:

A car moves up a hill at a constant velocity

Explanation:

Since the velocity is constant, the speed is also constant and so is the kinetic energy. However, total mechanical energy is sum of gravitational potential energy and kinetic energy, and the car is moving up the hill so its potential energy rises.

Thus, in the circumstances described the mechanical energy cannot be conserved.

The correct answer is A car moving up the hill with constant velocity.

5 0
3 years ago
What happens to the frequency of a wave if its energy increases?
salantis [7]
The frequency of a wave increases when the energy increases
6 0
3 years ago
a cannon sits on a stationary railroad flatcar with a total mass of 1000 kg. when a 10 kg cannonball is fired to the left at a s
marishachu [46]

Answer:

0.5 m/s

Explanation:

From Newton's Third law of motion,

Momentum of the cannon = momentum of the flatcar.

mv = MV........................ Equation 1

Where m = mass of the cannon, v = velocity of the cannon, M = mass of the flatcar, V = Velocity of the flat car.

make V the subject of the equation

V = mv/M................... Equation 2

Given: m = 10 kg, v = 50 m/s, M = 1000 kg

Substitute into equation 2

V = 10×50/1000

V = 500/1000

V = 0.5 m/s

Hence the speed of the flatcar = 0.5 m/s

6 0
3 years ago
Earth's temperature is maintained at an average of 15°C because of _____.
allochka39001 [22]

Answer: Atmosphere CO2 and Ozone Layer.

Explanation: The CO2 will trap heat and keep the avg of 70F, then ozone layer shields heat radiation kicking it down to a 59F temp.

6 0
3 years ago
Read 2 more answers
Other questions:
  • Can a body have constant speed and still be acclerating ? Give an Example
    7·1 answer
  • A car transports its passengers between 3 buildings. It moves from the first building to the second building, 4.76km away, in a
    7·1 answer
  • Help please number 8 an 9
    7·1 answer
  • Wolves are a keystone species because they are _____. at the top of the food chain are physically the largest animal in the food
    15·2 answers
  • What can you infer about the density of two objects if they object remains suspended in the liquid?
    12·2 answers
  • A rhinoceros beetle rides the rim of a disk rotating like a merry-go-round counterclockwise.
    15·1 answer
  • Does anyone know the answer to all of these questions
    5·1 answer
  • with what force will the a car hit a tree if the car has a mass of 3,000 kg and a acceleration of 2m/s^2​
    5·1 answer
  • Paraffin wax is used to make candles<br>true or false<br>​
    8·1 answer
  • A rocket initially at rest accelerates at a rate of 99. 0 meters/second2. Calculate the distance covered by the rocket if it att
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!