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nikklg [1K]
2 years ago
7

Lithium has a density of 0.5 g/cm3. What would be the mass of a 20 cm3 sample of lithium?

Physics
1 answer:
MrMuchimi2 years ago
6 0

Answer:

1 gm

Explanation:

.05 g/cm^3   *  20 cm^3 =   1 gm

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ID: A
postnew [5]

Answer: Velocity=8.26m/s

Explanation:

Acceleration=Finial velocity (V) - Initial velocity (u) ÷ Time

that is, a=v-u/t

a=1.2m/s², v=?, u=5.5m/s, t=2.3s

From a=v-u/t, make v the subject of the formula

v=at + u

v=(1.2* 2.3) + 5.5

v=2.76+5.5

v=8.26m/s

4 0
3 years ago
- A fridge has a maximum static friction force
Dennis_Churaev [7]

Answer:

They will move the fridge if they all push in the same direction, but it will not move with constant velocity

Explanation:

The maximum static friction force is

F_f = -250 N (negative sign since its direction is opposite to the push applied by the people)

Sam can apply a force of 130 N, while Amir and Andre can apply a push of 65 N each, so the total force that they can apply, if they push in the same direction, will be:

F=130 + 65 +65=260 N

This force is larger than the frictional force, so the fridge will start moving.

However, the net force on the fridge will be:

\sum F = 260 N - 250 N = 10 N

And according to Newton's second law,

\sum F = ma

where m is the mass of the fridge and a its acceleration, since the net force is not zero, then the fridge will have a non-zero acceleration, so it will not move with constant  velocity.

3 0
3 years ago
23. If a jogger runs 100 meters west and then turns around and runs 30 meters east. What
marshall27 [118]

Answer:

A

Explanation:

if he goes to the west, the east is opposite so 100-30

7 0
3 years ago
Read 2 more answers
The capitary action of water is caused the cohesion of water molecules to different types of molecules and the adhesion of water
s344n2d4d5 [400]

Answer:

This is True

Explanation:

I just did this exact unit in bio last week I hope this helps ;)

5 0
3 years ago
I need help with 5 please and thank you
Likurg_2 [28]

Answer: A

Explanation:

7 0
3 years ago
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