Physics Answers

A peice of copper and a peice of silicon have exactly thesame diamention and are carrying thesame current (100mil amper). Given that the average drift velocity of electron in the copper wire is 2.0×10^-15 meter per second.what is the drift speed of electron in the silicon( ncu=8×10^28m^3 and nsi= 3×10^18m^3)

acceleration is -2.5 and my mass is 950 can my answer be in minus if it’s Newton’s

What is the potential energi of an object where the mass is 4kg and the height is 8.5 meters

A magnifying glass gives a 4 time enlarged image at a distance of 25cm from the lens. Find the focal length of the lens

A volleyball is spiked over the net at an angle of 50° below the horizontal with a net acceleration of 3.6 m/s2. What is the horizontal force of the ball if it weighs 24 N?

What is the net force on a A 1400 kg car speeds up from 12.3 m/s to 37.3 m/s in 8.34 s. What was the net force acting on the car?

What is the net force on a 45 kg bike accelerating at 2.4 m/s

pirate decides to become a space pirate and boards a spaceship. As he passes another spaceship he decides to go for a space walk and yell hello to the passing ship. Explain why pirate is wasting his time

1. A black hole with a mass of 1.1 x 10^31 kg pulls a planet towards itself with a force of gravity of 2.8 x 10^21  If the distance between their centres of mass is 3.5 x 10^11 what is the mass of the planet?

1. Venus’s mass is 4.867 x 10^24 and its radius is 6,051.8 km. How much does an 81.0 kg woman weigh on Venus?