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astraxan [27]
2 years ago
7

a graduated cylinder contains 60 ml of water. A rock is added and the water level rises to 90 ml. if the rock has a mass of 0.6k

g, calculate the density of the rock.
Physics
1 answer:
Margarita [4]2 years ago
3 0

Answer:

20g/ml

Explanation:

the mass must be in gram and 90-60 =30

so 600g/30ml =20g/ml

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6 0
3 years ago
When electrical energy is being used by an electric light, what really happens to the energy?
vitfil [10]

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7 0
3 years ago
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I need help with this one ! <br><br>Explanation needed ~ ​
weqwewe [10]

Answer:

Please find here some hints :

Rule. Newton’s second law, or fundamental principle of dynamics, mentions that a resultant force exerted on an object is always equal to the product of the mass of that object by its acceleration. ... Each force applied to an object causes this object to accelerate in the direction of the force applied.

Is acceleration a force?

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Explanation:

5 0
2 years ago
A sports car moving at constant speed travels 164 m in 13.77 s. If it then brakes and comes to a stop in 3.6 s. What is its acce
Sergio039 [100]

Answer:

a = - 0.3376 g's

Explanation:

The sports car has a constant speed when travelling. Covered 164 m in 13.77 s. Thus, speed = 164/13.77 m/s

It brakes and now comes to a stop in 3.6 s.

Thus final velocity = 0 m/s

Formula for acceleration is;

a = (v - u)/t

a = (0 - (164/13.77))/3.6

a = -3.308 m/s²

In terms of g's", where 1.00 g = 9.80 m/s², we have;

a = -3.308/9.8 g's

a = - 0.3376 g's

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3 years ago
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