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
Maksim231197 [3]
3 years ago
15

Car A has a mass of 2000 kg and is going 28 m/s east.

Physics
1 answer:
maks197457 [2]3 years ago
6 0
Car A 2000 kg 28m Se
You might be interested in
A certain moving electron has a kinetic energy of 0.991 × 10−19 J. Calculate the speed necessary for the electron to have this e
alisha [4.7K]

Answer: The speed necessary for the electron to have this energy is 466462 m/s

Explanation:

Kinetic energy is the energy posessed by an object by virtue of its motion.

K.E=\frac{1mv^2}{2}

K.E= kinetic energy = 0.991\times 10^{-19}J

m= mass of an electron = 9.109\times 10^{-31}kg

v= velocity of object = ?

Putting in the values in the equation:

0.991\times 10^{-19}J=\frac{1\times 9.109\times 10^{-31}kg\times v^2}{2}

v=466462m/s

The speed necessary for the electron to have this energy is 466462 m/s

4 0
3 years ago
Read 2 more answers
Some people wish that we lived in a recollapsing universe that would eventually stop expanding and start contracting. For this t
Monica [59]

Answer:

(B) Dark energy does not exist and there is much more matter than current evidence suggests.

Explanation:

The repulsive force which is accelerating expansion of the universe is called as dark energy. Most of matter present in the universe is the dark matter of about eighty five percent.

So, a collapsing universe would not have the dark energy and there is more matter which is not the dark matter. This theory is rejected because expansion of the universe is observable.

4 0
3 years ago
the power rating of an electric lawn mower is 2200 watts. if the lawn mower was used for 30 mins, and 650 Newtons of force was u
Tasya [4]

Answer:

Calculate the work done by a 47 N force pushing a 0.025 kg pencil 0.25 m ... A boy on a bicycle drags a wagon full of newspapers at 0.80 m/s for 30 min ... A power mower does 9.00 x 105 J of work in 0.500 h. ... p: W 2200ch: w will320,000 T/ ... How much electrical energy (in kilowatt hours) would a 60.0 W light bulb use in ..

Explanation:

4 0
2 years ago
6. What disadvantages or pitfalls might be associated with using a fa ce book classroom page? Name at least two and discuss why
Novosadov [1.4K]

Answer:

poultion and canser

Explanation:

4 0
2 years ago
3. Identify which of the following probably would not have an effect on the climate of a region:
Nat2105 [25]
C.) A thunderstorm
That’s the Answer
6 0
2 years ago
Other questions:
  • darwins explanation for why different species exist is best described as a law, theory, inquiry, hypothesis?
    11·1 answer
  • Write about the similarities and differences between kinetic and potential energy. Include specific, real world example in your
    7·1 answer
  • If a reaction is exothermic and produces large quantities of heat reaching equilibrium, its equilibrium constant will be
    11·2 answers
  • How many significant digits are in the measurement 50.003010 nm?
    14·2 answers
  • What is the connection between electrons and protons
    15·1 answer
  • A fast-food restaurant uses a conveyor belt to send the burgers through a grilling machine. if the grilling machine is 1.2 m lon
    13·1 answer
  • Please help with my geology hw
    11·1 answer
  • What is the frequency of the fundamental mode of vibration of a steel piano wire stretched to a tension of 440 N? The wire is 0.
    12·1 answer
  • What is KiloWatt unit in simple words??<br> Explain.......
    12·1 answer
  • An object on the surface of the earth weighs 90 lb. At two earth radii above the surface, It will welgh:
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!