Convert gravitational potential energy to kinetic energy.

convert the following.

1. 1.7 j

2. 2.27 j

3. 1.1 j

1.7 J

Explanation:

The energy carried by a single photon is given by

E=hf

where h is the Planck's constant and f is the frequency of the photon.

The photon of our exercise has a frequency of f=1.7 \cdot 10^{17} Hz, therefore its energy is

E=hf=(6.63 \cdot 10^{-34}Js)(1.7 \cdot 10^{17} Hz)=1.1 \cdot 10^{-16} J

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s