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/
Force=mass*acceleration
F=ma
F=25*5
F=100 N
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
Answer: 3,893,845.918 Ping-Pong balls
Explanation:
The volume of an average room is:
(1)
(2)
Now let’s transform this
to units of
, knowing
:
(3)
On the other hand, we have Ping-Pong balls with a radius
, and their volume is given by:
(4)
(5)
(6)
Now, the number
of Ping-Pong balls that can be packed into the room is:
(7)
(8)
This is the number of Ping-Pong balls that can be packed into an average size room