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Oksi-84 [34.3K]
3 years ago
11

Question 3 (3 points)

Physics
2 answers:
topjm [15]3 years ago
8 0

Answer:

1. element symbol = Kr

2. atomic mass = 83.80

3. Atomic number = 36

Tomtit [17]3 years ago
3 0
I think it is but 1. Element symbol
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A man has 887.5 J of kinetic energy while running with a velocity of 5 m/s. What is his mass?
monitta

Answer:

The mass of the man is 71 kg

Explanation:

Given;

kinetic energy of the man, K.E = 887.5 J

velocity of the man, v = 5 m/s

The mass of the man is calculated as follows;

K.E = ¹/₂mv²

where;

m is the mass of the man

2K.E = mv²

m = 2K.E / v²

m = (2 x 887.5) / (5)²

m = 71 kg

Therefore, the mass of the man is 71 kg

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What is the force on a 1000kg elevator that is falling freely at 9.8 m/sec^2
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Hope this helps!
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