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A hair dryer uses 2000J in 5 seconds when on full power. The power used is?

we are told that E = 2000J and t = 5s we need to find P

recall which formula used energy, time and power

P = E/t

sub in values

P = 2000/5

Answered by Tom F. • Physics tutor

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What is the difference between a scalar and a vector quantity?

A scalar quantity has magnitude only - for example distance.A vector has magnitude and direction - for example gravity (acceleration tow...

Answered by Emma W. • Physics tutor

12513 Views

What is the difference between speed and velocity?

The difference is a bit subtle. Velocity is speed in a particular direction.

So, for example, a car travelling at 50 miles per hour round a bend is travelling at constant speed. Its direc...

Answered by Jan K. • Physics tutor

3024 Views

State 2 factors that affect the centripetal force for a object having a circular path.

Answer: Can be any 2 of mass, velocity or radius of path.

The formula for the centripetal force (resultant) acting F=m(v^2)/r. Therefore the variables are mass, velocity for the object ...

Answered by Winston M. • Physics tutor

14849 Views

If a cricket ball of mass 500g is thrown upwards from the ground with an initial velocity of 20 m/s, how high will the ball reach?

The best method of answering this question would be to look at the energy of the ball at the moment it is thrown and at the moment it reaches its highest point.
When the ball is thrown, initially all...

Answered by Thomas C. • Physics tutor

11149 Views