Top answers

Matt weighs 60kg and his son, Rob weighs 30kg. They both run a 100m race and finish the race running at 5m/s. Who has more Kinetic Energy at the end of the race?

Kinetic energy is given by the equation:K.E. = 0.5mv 2 Therefore Matt has Kinetic energy:K.E. (Matt) = 0.5*(60) (5) 2 = 750JAnd Rob has Kinetic energy:K.E. (Rob) = 0.5 (30)*(5) 2 = 375JTherefore Matt has the...
LB
Answered by Lewis B. • Physics tutor
2439 Views

Define the Specific Heat Capacity of a material. What is its unit?

This is the amount of energy needed to heat 1kg of the material by 1 degree: ENERGY to heat a MASS by a TEMPERATURE INCREASE. Usingstandard units:Energyis in Joules [J]Massis in kilograms [kg]Temperaturein d...
LO
Answered by Laura O. • Physics tutor
2590 Views

Describe the forces acting on a skydiver over time, from the moment she jumps out of the plane until hitting the ground and the effect this has on her velocity. What happens when she opens her parachute?

When the skydiver first steps out of the plane, she accelerates downwards at a high rate. At first the resultant force on her is large since gravity pulls her down, but since she is moving slowly the force f...
SP
Answered by Siobhan P. • Physics tutor
24991 Views

Given an ammeter voltmeter a battery and a lamp how will you find the resistance of the lamp?

I will draw this on the whiteboard function.
BH
Answered by Ben H. • Physics tutor
2095 Views

Which type of electromagnetic radiation has the longest wavelength?

Radio waves
TD
3296 Views