A 0.57 kg rubber ball has a speed of 2.2 m/s at point A and kinetic energy 8.0 J at point
B. Find
a) the ball’s kinetic energy at A.
Answer in units of J.

b) the ball’s speed at B.
Answer in units of m/s.

c) the total work done on the ball as it moves
from A to B.
Answer in units of J.

Aprojectile is launched horizontally 10m above the ground and with an initial velocity of 15 m/s. a) determine the magnitude and direction of projectile velocity at t= 1.3s b) determine the magnitude and direction of projectile acceleration at t=1.3s

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

The energy released by a chemical reaction can be measured using a calorimeter. when barium hydroxide octahydrate crystals are reacted with dry ammonium chloride inside of a coffee cup calorimeter, the temperature of the 18.00 g of water in the calorimeter decreases from 30.0°c to 8.0°c. the equation for calculating energy absorbed or released by a reaction is: where q is the energy released or absorbed, m is the mass of water in the calorimeter, cp is the specific heat of water, and δt is the observed temperature change. if the specific heat of liquid water is 4.19 j/g·°c, how much energy was absorbed by the reaction?