Other Physics Answers

mass of 5 000kg is taking off straight up from the surface of the Earth. How much upwards force do the rockets engine need to produce to cause the rocket to accelerate straight up at 15m/s2? 

A 1.6m tall man stands in front of a plane mirror.how tall is the image form

1. A 50-kg barbell is lifted at a height of 1.4m from the floor in 1.2 seconds. What is the work done? how much power is expended?

2. A 60 kg block at rest was pushed by a 100 N force on a frictionless horizontal.

A. what is the kinetic energy of the block at a distance of 8 meters?

B. what is the velocity of the blockat a distance of 8 meters?

A Carnot heat engine with an efficiency of 60% receives heat of 3000kj from a source and reject the waste heat to medium at 300k.Determine the source temperature

Two identical tiny metal balls have charges Q1 and Q2. The repulsive force one exerts on the other when they are 25 cm apart is 7.33 x 10^-4 N. After the balls are touched together and then separated again to 25 cm, the repulsive force is found to be 9.67 x 10^-4 N. What are the charges of Q1 and Q2

A spherical ball of plasma has a radius of 0.50 m. The electric field on the surface of the ball is measured to be 8.9 x 103 N/C and points radially inward toward the center. What is the value of the electric charge

Two identical conducting spherese are placed with their centers 45 cm apart one is given a charge of +12 x 10^-9 C and the other is given a charge of -18 x 10^-9 C. the spheres are connected by a conducting wire. After equilibrium has occurred, find the electric force between the two spheres

A 10-Newton object moves to the left at 1 m/s. Its kinetic energy is approximately _____ Joules.

a. 0.5

b. 1

c. 10

d. more than 10

A 100 kg block is pulled at a constant speed of 5 m/s across a horizontal force by an applied force of 122 N directed 37 ^o above the horizontal. The rate at which the force does work on the block is.

a. 810 Watts             

b. 490 Watts           

c. 530 Watts        

d. 704 Watt