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Deffense [45]
3 years ago
7

The atomic number tells how many _____ are in the nucleus

Physics
1 answer:
maria [59]3 years ago
4 0

Answer:

1 because I looked it up for sure

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A ball, which has a mass of 1.25 kg, is thrown straight up from the top of a building 225 meters tall with a velocity of 52.0 m/
Anastasy [175]

First we will find the speed of the ball just before it will hit the floor

so in order to find the speed of the cart we will first use energy conservation

KE_i + PE_i = KE_f + PE_f

\frac{1}{2}mv_i^2 + mgh = \frac{1}{2}mv_f^2 + 0

\frac{1}{2}(1.25)(52)^2 + 1.25(9.8)(225) = \frac{1}{2}(1.25)v_f^2

So by solving above equation we will have

v_f = 84.3 m/s

now in order to find the momentum we can use

P = mv

P = 1.25 \times 84.3

P = 105.4 kg m/s

3 0
3 years ago
I need help with question 2 and 2 please
vitfil [10]
Alright here the answer to number 2

5 0
3 years ago
4. A student measures a temperature several times. The readings lie between 29.6 and 30.2 K. This
Alona [7]

Answer:

(C) apparently written incorrectly - it should be 29.9 +- .3 K

(read 29.9 plus or minus .3 K)

8 0
2 years ago
when a hockey stick strike a hockey puck and sends it towards the goalie, (thermal, mechanical) energy is being transferred from
velikii [3]

Answer:

Yes... definitely true.. can you tell me what is the question..

Explanation:

Please mark me brainliest :D

And also.. I would appreciate it if you give me 5 stars and a thanks.. :D

8 0
2 years ago
The study of charges in motion and their
vredina [299]

Answer:

The study of charges in motion and their  interaction with magnetic fields is known as electromagnetism.

Any material with an unequal number of  electrons and or protons could generally be  termed as ion.

Explanation:

i hope this will help you :)

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3 years ago
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