The dots on an hr diagram represent which of the following?

a. galaxies

b. stars

c. solar systems

d. only main sequence stars

why is it important to consider the position, direction and speed of an object when describing its motion?

The sum of the protons and neutrons in an atom equals the a. atomic number. b. number of electrons. c. atomic mass. d. mass number.

Why is convex lens is called converging lens?

A 10 kg box initially at rest is pulled with a 50 N horizontal force for 4 m across a level surface. The force of friction acting on the box is a constant 20 N. How much work is done by the force of friction?

A motorcycle is capable of accelerating at 5.1 m/s starting from rest how far can it travell in 1.5 sec

A bullet is accelerated down the barrel of a gun by hot gases produced in the combustion of gun powder. What is the average force exerted on a 0.0300-kg bullet to accelerate it to a speed of 600 m/s in a time of 2.00 ms (milliseconds) ?

Why are the sedimentary layers at capitol reef tilted?

What do we call it when an object exerts force on another for a short period of time? * Momentum Work Impulse Friction

Why is flammability a chemical property?

Luke pulls a sled using a force of 65 N for a distance of 25 m across level ground. The rope Luke pulls forms an angle of 25° with the ground. About how much work does Luke do on the sled? 250 J 690 J 1,500 J 1,600 J