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Oksana_A [137]
4 years ago
10

How does the movement of particles of matter change when matter goes from solid to liquid?

Physics
1 answer:
icang [17]4 years ago
5 0
Solid to liquid: molecules spread out to have their own spaces and move energetic and lively.
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Why is the energy stored in the wire per unit volume=1/2*strain*stress​
Sav [38]

Answer:

have tried it and the units end up being Nm^-2 (the unit of stress) however the unit for joules is Nm.

Source https://www.physicsforums.com/threads/why-does-1-2-stress-strain-equal-the-energy-stored-per-unit-volume-in-a-wire.565495/

6 0
3 years ago
A 25 kg mass is accelerated by a force at a rate of 5 m/s2. What is the magnitude of the force that accelerates the man?
svlad2 [7]
Force=mass*acceleration
F=ma
F=25*5
F=100 N
8 0
3 years ago
Work out the current through an electric kettle with a power of 2.2 kW if it uses the 180 V mains supply. Round your answer to 2
weeeeeb [17]

Answer:

12 A

Explanation:

Given,

Power of electric kettle=2.2 kW=2200W (since 1kW=1000W)

Voltage=180V

Current=?

Power = Voltage*Current

Current = Power ÷ Voltage

=2200W ÷ 180V

=12.22 Ampere

=12 A

7 0
3 years ago
Estimate the number of Ping-Pong balls that can be packed into an average size room (without crushing them). Given that Ping-Pon
scoray [572]

Answer: 3,893,845.918 Ping-Pong balls

Explanation:

The volume of an average room is:

V_{room}=(length)(width)(height) (1)

V_{room}=(12 ft)(18 ft)(9 ft)=1944 ft^{3} (2)

Now let’s transform this V_{room} to units of cm^{3}, knowing 1 ft=30.48 cm:

V_{room}=1944 ft^{3}\frac{{(30.48 cm)}^{3}}{1ft^{3}}=55,047,949.78 cm^{3} (3)

On the other hand, we have Ping-Pong balls with a radius r=1.5 cm, and their volume is given by:

V_{balls}=\frac{4}{3} \pi r^{3} (4)

V_{balls}=\frac{4}{3} \pi (1.5 cm)^{3} (5)

V_{balls}=14.137 cm^{3} (6)

Now, the number n of Ping-Pong balls that can be packed into the room is:

n=\frac{V_{room}}{V_{balls}} (7)

n=\frac{55,047,949.78 cm^{3}}{14.137 cm^{3}}  (8)

n=3,893,845.918 This is the number of Ping-Pong balls that can be packed into an average size room

7 0
3 years ago
Shaking a long metal chain up and down can create a _____ wave in the chain.
Aloiza [94]
I think Transverse.
8 0
3 years ago
Read 2 more answers
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