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harkovskaia [24]
3 years ago
15

Can anybody tell me the right answer ? please and thank you !!

Physics
1 answer:
ad-work [718]3 years ago
3 0

Answer:

c. selenium

Explanation:

sulfur and selenium are in the same group

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Law Incorporation [45]

Answer: Friction also prevents an object from starting to move, such as a shoe placed on a ramp. When friction acts between two surfaces that are moving over each other, some kinetic energy is transformed into heat energy. Friction can sometimes be useful.

Explanation:

8 0
3 years ago
If the 50-kg crate starts from rest and achieves a velocity of v = 4 m/s
Kay [80]

Answer:

P = 227 N

Explanation:

Assuming the crate is on horizontal ground and subject to a horizontal force.

F = ma

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P = m(a + μg)

P = m(v²/2s + μg)

P = 50(4²/(2(5))+ 0.3(9.8))

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6 0
3 years ago
A car starts from rest and travels for 5.8 s with a uniform acceleration of 1.6 m/s² in the negative direction. What is the fina
elena-s [515]

Answer:

Final velocity of the car will be -9.28 m/sec        

Explanation:

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From first equation of motion we know that

v = u+at

So v=0+(-1.6)\times 5.8=-9.28m/sec

So final velocity will be -9.28 m/sec

8 0
3 years ago
Chemical energy is stored in food until it is eaten. The energy in food is an example of _______.
777dan777 [17]
Potential energy is the answer
4 0
3 years ago
Mr.smith and his wife were trying to move their new chair. Mr. Smith pulls with a force of 30N while Mrs.Smith pushes with a for
luda_lava [24]

Answer:

55N

Explanation:

30N + 25N = 55N

7 0
3 years ago
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