A homogenous rod of length 5 m and a mass of 60 kg is kept in lever. Calculate the effort required to balance lever.

The neucleus of about atom contains positive or negative electrons

Students will explain, distinguish the difference between the 4 states of matter

The appearance of color is a result of the absorption and reflection of certain wavelengths of light. A shirt appears a certain color because it reflects that color of light.

What is not a wave of the eletromagnetic spectrum

Computers are fast and do not make errors when doing calculations. Does this mean that computer models are always correct? Explain your answer.

An astronaut on the planet Trappist-1b tosses a rock horizontally with a speed of 7.95m/s. The rock falls through a vertical distance of 2.35m and lands horizontal distance of 9.57m from the astronaut.

Whicg of the following is not a force that would act on a bicycle as it moves down a street gravity air resistance fluid friction sliding friction

A student holds a magnet 1 m from a paper clip and sees no evidence of a force acting between the two. When the student brings the magnet 1 cm away from the paper clip, the paper clip begins to slide toward the magnet.

According to Newton's 3rd Law, an object's momentum depends on it's velocity and mass. 4 dog-sled teams competed to see who could gain the greatest momentum.

When resistors are connecting in a series, does the position of ammeter make any difference?