What will be the time period of simple pendulum at the center of earth

What are the two main forces in a star

Dominic has a block made of wood, Jesse has a block of the same volume made of stone. If they are both left in the sun for the same length of time, which one will feel hotter when touched?

8a/46=92 a=x explain

A 1900kg airplane is flying at an altitude of 510 above the ground. What is the gravitational potential energy in Joules?

Sam drives 8 miles west to the store in 10 min. Then he drives 5 miles west to the bank in 6 min. Finally he drives 2 miles east to school in 3 min. What was Sam's total distance traveled? (Give #, no unit)

What is the effect of food color in the amount of food fish eat

Henry Heavtweight weighs 1000 N and stands on a pair of bathroom scales so that one scale reads twice as much as the other. What is the greater scale reading? What is the lesser scale reading?

A tape dispenser is an example of which simple machine pulley lever inclined plane screw

A brick with a mass of 20 kg and a weight of 196 N is released on a frictionless plane at an angle of 30°. What is the acceleration of the brick? A. 4.9 m/s2 B. 5.6 m/s2 C. 8.5 m/s2 D. 9.8 m/s2

As light reflects off a mirror the angle between the incident ray and reflected ray of light is 50°. What is the angle of reflection?