Density is mass divided by volume. rho=m/v. So, v=m/rho. In frank's case this is 80/8 = 10 cm^3.
A substance which allows the un-interrupted flow of electric current is called an electric conductor
Answer:
Let the weight of the ruler be X.
Now X acts in the middle, so we have 55-50 = 50cm
Since left hand movement= right hand movement
X(55-50)=90(95-55)
5X= 90×40
X=320cm
Hence the weight of the ruler is 320g
Explanation:
Answer:Both will continue traveling at the same speed because there is no friction.
Explanation: Gravitational force or pull is the force acting to attract all object in and around the Earth to the center of the Earth. The Earth's Gravitational force acts as a Bar magnet.
When objects are working outside the impact of the force of Gravity,it will not matter whether the objects are of the same size or wether one is heavier than the other,in this case both objects will move at the same speed as there is no impact of the Force of Gravity.
Answer:
The rate of work is 360 W
Explanation:
Given:
Speed of block 
Upward acceleration of block 
Mass of block 
kg
First Find the force act on block due to gravity
Where 
N
For finding at what rate motor doing work when it is pulling the block upward,
W
Therefore, the rate of work is 360 W
