Ameasure of the amount of light received on earth is a star's
a. apparent magnitude
c. position in space
b. absolute magnitude
d. size

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?

Immediately upon reaching its lowest point, a falling pendulum bob has its greatest amount of energy, which is the initial amount of potential energy. a. heat; less than b. heat; more than c. kinetic; less than d. kinetic; more than

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87