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marissa [1.9K]
2 years ago
6

Give an example of a positively charged object

Physics
1 answer:
allochka39001 [22]2 years ago
6 0
When a charged balloon is brought near a conducting can, the electrons are pushed to the far side of the can. If another object touches the side of the can opposite the balloon, electrons flow into the other object, leaving the can positively charged
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If the amplitude of a sound wave is tripled, by what factor will the intensity increase?
Shtirlitz [24]

Answer:

By a factor 9

Explanation:

The intensity of a sound wave is proportional to the square of the amplitude of the wave:

I \propto A^2

where

I is the intensity

A is the amplitude of the wave

In this problem, the amplitude of the sound wave is increased by a factor 3:

A' = 3A

So the intensity would change by

I' \propto A'^2 = (3A)^2 = 9 A^2 = 9I

So, the intensity would increase by a factor 9.

5 0
3 years ago
A spring that has a force constant of 1050 N/m is mounted vertically on the ground. A block of mass 1.95 kg is dropped from rest
aleksandrvk [35]

Answer:

25.2 cm

Explanation:

K = 1050 N/m

m = 1.95 kg

h = 1.75 m

By the conservation of energy, the potential energy of the block is converted into the potential energy stored in the spring

m g h = 1/2 x k x y^2

Where, y be the distance by which the spring is compressed.

1.95 x 9.8 x 1.75 = 1/2 x 1050 x y^2

33.44 = 525 x y^2

y = 0.252 m

y = 25.2 cm

8 0
3 years ago
4. An aluminium bar weighs 17 kg in air. How much force is required
kkurt [141]

Explanation:

1ml = 2.7g

Xml = 1.5g

Divide 1.5 by 2.7 to find X.

Obviously, since 1.5 is less than 2.7, you know the answer will be less than 1.

(it’s .5555555555)

4 0
3 years ago
a weather balloon slowly expands as energy is transferred as heat from the outside air. if the average net pressure is 1.5×10^5m
Alexxx [7]
There is only one pressure this situation would be a "constant pressure" process
3 0
4 years ago
Read 2 more answers
Imagine two starts are exactly the same size, but one of the stars to greater mass than the other.which star will burn out all o
Neko [114]

Answer:

The larger star will burn out faster. as nuclear fuel is burned out due to higher percentage being consumed.

Explanation:

Gravity on the other hand is only affected a little during this process and mass use. Solar mass loss is caused by mass that is turned into energy (E=mc²), but also by the material that is lost to the solar wind.

4 0
3 years ago
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