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
saw5 [17]
3 years ago
10

A student pulls a lever down 4 m. The lever lifts a box that weighs 20 N up a distance of 2 m. How much work was done on the box

?
Physics
1 answer:
adelina 88 [10]3 years ago
4 0
The answer is 40 J.  <span>A student pulls a lever down 4 m. The lever lifts a box that weighs 20 N up a distance of 2 m. 40 J of work was done on the box.  </span>
You might be interested in
I WILL NAME YOU BRAINLIEST IF YOU ANSWER THIS!! This question will make you think twice, let see if you can answer this! Worth 1
11Alexandr11 [23.1K]

Answer:

He took a picture (or "shot") of the buffaloes. How cute :)

7 0
2 years ago
Read 2 more answers
A 12 kg box is pulled across the floor with a 48 N horizontal force. If the force of friction is 12 N, what is the acceleration
Oksi-84 [34.3K]

Answer:

The acceleration of the box is 3 m/s²

Explanation:

Given;

mass of the box, m = 12 kg

horizontal force pulling the box forward, Fx = 48 N

frictional force acting against the box in opposite direction, Fk = 12 N

The net horizontal force on the box, F = 48 N - 12 N

The net horizontal force on the box, F = 36 N

Apply Newton's second law of motion to determine the acceleration of the box;

F = ma

where;

F is the net horizontal force on the box

a is the acceleration of the box

a = F / m

a = 36 / 12

a = 3 m/s²

Therefore, the acceleration of the box is 3 m/s²

7 0
3 years ago
Two satellites are orbiting earth at different altitudes. Which satellite orbits at a higher speed v around earth?
aniked [119]

Answer:

Low satellite has high orbital velocity

Explanation:

let v be the orbital speed of the satellite orbiting at a height h is given by

v=\sqrt{\frac{GM}{R+h}}

where, M be the mass of planet, r be the radius of planet and h be the height of planet from the surface of planet.

here we observe that more be the height lesser be the orbital velocity.

So, a satellite which is at low height has high orbital velocity.

3 0
3 years ago
Dolphins communicate using compression waves (longitudinal waves). Some of the sounds dolphins make are outside the range of hum
Sphinxa [80]
Water is a really good conductor of sound so I would have to say that it would be to send the message underwater because a more dense medium produces a louder sound
8 0
3 years ago
1. Determine the energy released per kilogram of fuel used.
Serga [27]

The formula for energy release per kilogram of fuel burned is energy release per kg=6.702*10-13. and 19. J 1 Mev = 1.602 X 10 T

Calculate the energy in joules per kilogram of reactants given MeV per reaction. Energy is the ability or capacity to perform tasks, such as the ability to move an item (of a certain mass) by exerting force. Energy can exist in many different forms, including electrical, mechanical, chemical, thermal, or nuclear, and it can change its form.
Think of a mole of plutonium-239 (molar mass: 239 grams) as a mole of "reactions."

Energy used in the US per person annually = 3-5 X 1011
Population (number of people) = 3.108The required mass of the fuel is 3.5x1011 x3-1x10 8x 10)/6.703 X1013 kg. the mass required: 1.62 x 1033 kg Mev in Joules 6 is equal to 101.60*I0-
19. J 1 Mev = 1.602 X 10 T, which translates to 1.602*1013/2.39x10-3 energy release per kilogram, or 6.702*10-13.

To learn more about Energy please visit -
brainly.com/question/27671072
#SPJ1

8 0
2 years ago
Other questions:
  • Which of the following is created when the ice of a comet starts to melt into gases?
    12·1 answer
  • Positive and negative charges are attracted to one another. The phenomenon of static electricity requires a separation of positi
    7·2 answers
  • the celsius temperature of a 3.00-L sample gas is lowered from 80.0 C to 30.0 C what will be the resulting volume of this gas
    9·2 answers
  • Una rapidez de 7 mm/us es igual a:<br><br> A) 7000m/s<br> B) 70 m/s<br> C) 7 m/s<br> D) 0.07 m/s
    13·1 answer
  • As an object is undergoing free fall motion.As it falls the objects?,speed increases,acceleration increases,both of these,or non
    10·1 answer
  • What could happen if a black whole eat earth
    8·1 answer
  • You are in a speedboat on a river moving in the same direction as the current. The speedometer on the boat shows that its speed
    7·1 answer
  • Emma a total of 25 seconds to crawl 4 feet south and then 6 feet east.
    10·1 answer
  • Can someone please give me this answe
    7·1 answer
  • The car's initial speed was 32m / s and it takes 99 seconds for the car to come to a full stop after the driver applies the brak
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!