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
Stells [14]
3 years ago
12

Answer all of these questions and you will get the brainlist

Physics
2 answers:
adelina 88 [10]3 years ago
6 0

Answer:

1. kinetic energy = ½mv²

m= 2.1 kg

v = 30m/s

Ek = ½ ×2.1×30×30

= 945J

2. potential energy = mgh

m = 190kg

g = 9.8

h = 45m

Ep = 190×9.8 × 45

= 83790J

3.potential energy = mgh

m= 75kg

g= 9.8

h = 300m

Ep = 75×9.8×300

= 220,500J

Gnoma [55]3 years ago
5 0

Answer:

2 ans : the bell has 8550 J energy

You might be interested in
Which of the following is maintained across the terminals of a battery? A. a potential difference B. a voltage drop C. an electr
serious [3.7K]
I believe the answer is C. An electric charge
5 0
3 years ago
Read 2 more answers
Which type of electromagnetic radiation is most likely to be ionizing
zlopas [31]

Answer:

Xrays. i hope that helps

Explanation:

4 0
3 years ago
Read 2 more answers
What is momentum equal to?
Setler [38]

Answer:

D

Explanation:

mass times velocity

hope this help

8 0
3 years ago
You stand on a bathroom scale in a moving elevator. what happens to the scale reading if the cable holding the elevator suddenly
Viefleur [7K]

A bathroom scales works due to gravity. Under normal conditions, a reading can be obtained when your body is pushing some force on the scale. However in this case, since you and the scale are both moving downwards, so your body is no longer pushing on the scale. Therefore the answer is:

<span>The reading will drop to 0 instantly</span>

7 0
4 years ago
Read 2 more answers
Whyy is my computer talking to me
PolarNik [594]

Answer:

good question, did you press any certain buttons?

Explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • Which voice can produce a pitch that has a speed of 343 m/s and a wavelength of 0.68 m? Check all that apply.
    12·2 answers
  • The formula for potential energy is mass x gravity x height. How much potential energy is in a 10 kg rock sitting on a cliff tha
    13·1 answer
  • Bob is driving the getaway car after the big bank robbery. He’s going 50 m/s when hisheadlights suddenly reveal a nail strip tha
    6·1 answer
  • An object of mass m is dropped from height h above a planet of mass M and radius R .Find an expression for the object's speed as
    11·2 answers
  • -What can you say about the snowboarder’s kinetic energy as he moves?
    10·1 answer
  • What is the period of a 1.00 m long pendulum?
    7·1 answer
  • Which term describes the reaction process in a fission reaction?
    13·2 answers
  • What are the four forms of matter that waves can travel through?
    6·2 answers
  • In a reaction the mass of a reactant decreases by 58g in 233 seconds. What is the rate?
    6·1 answer
  • A pulley system with a mechanical advantage of 15 is used to lift a 1750 N piano to a third floor balcony that is 7 m above the
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!