Asoccer ball is traveling at a velocity of 50 m/s. the kinetic energy of the ball is 500 j. what is the mass of the soccer ball?

a. 0.1 kg
b. 0.2 kg
c. 0.4 kg
d. 0.5 kg

laticia draws the diagram below to show earth’s magnetic field.

answer

the arrows to the right of earth should point up.

radiation

explanation:

heat is transmitted by radiation

answer: the potential energy decreases from 379 j to 243 j

explanation:

for the law of conservation of energy, the total energy in a system must be conserved. the total energy of the system is given by the sum of kinetic (k) and potential (u) energy:

e = k + u

the total energy is e=675 j, and this does not change.

initially, the kinetic energy is k=296 j, so the potential energy is

at the end, the kinetic energy is k=432 j, so the potential energy is

so, we see that the potential energy has decreased from 379 j to 243 j.