State whether the following statements are true or false. If flase, correct it. 1) Force has magnitude as well as direction.
2) Friction does not produce heat.
3) The unit of frequency is decibel.
4) The copper rod can be charged by friction, if held by hand.
5) The angle is sometimes equal to angle of reflection.
6) Mars is also called as the red planet.
7) Seminal vesicles is a part of female reproductive system.​

When you turn on a battery-operated device, an electrical circuit is

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?