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Allisa [31]
3 years ago
13

Which particles account for most of the mass of an atom?

Physics
1 answer:
BartSMP [9]3 years ago
8 0
Protons and Neutrons account for most of an atoms mass
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6. A 2.2 kg rock rests on the edge of a bridge that is 3.3 m above a river. What is the
vovikov84 [41]

Answer: 71 J

Explanation: The formula for gravitational potential energy is Epg= mgh.

So you plug in 2.2 as m, 3.3 as h and 9.81 as g. Once you do that you should get an answer of 71.2206. But because there are only two significant digits in the question, your answer must also have two significant digits.

6 0
3 years ago
4. A trolley of mass 2kg rests next to a trolley of mass 3 kg on a flat
nydimaria [60]

Answer:

a. The total momentum of the trolleys which are at rest before the separation is zero

b. The total momentum of the trolleys after separation is zero

c. The momentum of the 2 kg trolley after separation is 12 kg·m/s

d. The momentum of the 3 kg trolley is -12 kg·m/s

e. The velocity of the 3 kg trolley = -4 m/s

Explanation:

a. The total momentum of the trolleys which are at rest before the separation is zero

b. By the principle of the conservation of linear momentum, the total momentum of the trolleys after separation = The total momentum of the trolleys before separation = 0

c. The momentum of the 2 kg trolley after separation = Mass × Velocity = 2 kg × 6 m/s = 12 kg·m/s

d. Given that the total momentum of the trolleys after separation is zero, the momentum of the 3 kg trolley is equal and opposite to the momentum of the 2 kg trolley = -12 kg·m/s

e. The momentum of the 3 kg trolley = Mass of the 3 kg Trolley × Velocity of the 3 kg trolley

∴ The momentum of the 3 kg trolley = 3 kg × Velocity of the 3 kg trolley = -12 kg·m/s

The velocity of the 3 kg trolley = -12 kg·m/s/(3 kg) = -4 m/s

3 0
3 years ago
a solenoid has 364 coils. the flux through each changes from 2.57*10^-5 Wb to 9.44*10^-5 Wb in 0.0154s. how much EMF is generate
timurjin [86]

Answer:

1.62

Explanation:

comment section (credits to <em>charlizebarth</em>)+ correct on acellus

8 0
2 years ago
A fisherman notices that wave crests pass the bow of his anchored boat every 5.0 s. He measures the distance between two crests
Flauer [41]

Answer:          |

Read More    V

Explanation:

Haha. You FOOL. Unless you have bought the dumb brainly plus you had to watch an AD for NO ANSWER.

8 0
3 years ago
A student noted that the sign shown here is always associated with a wheelchair ramp at or near a staircase or entrance steps. W
Vitek1552 [10]

The main reason why wheelchair ramps are used to move people up a staircase is because it has a high mechanical advantage which leads to a greater efficiency in moving people up the staircase.

  • <em>Let the height of the staircase = h</em>
  • <em>Let the length of the ramp = L</em>

The mechanical advantage of the ramp is calculated as follows;

M.A = \frac{L}{h}

As the length of the ramp increases, people will be move up to a greater distance up the staircase.

Thus, the main reason why wheelchair ramps are used to move people up a staircase is because it has a high mechanical advantage which leads to a greater efficiency in moving people up the staircase.

Learn more about mechanical advantages of ramps here: brainly.com/question/200179

3 0
2 years ago
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