Just One question please help. A dog with mass 14 kg has a kinetic energy of 135.5 J. What is the speed of the dog?
A. 2.3 m/s
B. 5.1 m/s
C. 3.2 m/s
D. 4.4 m/s

Explain using examples, what is simple harmonic motion and why it is an important area of study in physics.

Why do electron microscopes have higher resolving power than light microscopes?

Aprojectile is launched from ground level with an initial velocity of v 0 feet per second. neglecting air resistance, its height in feet t seconds after launch is given by s equals negative 16 t squared plus v 0 t. find the time(s) that the projectile will (a) reach a height of 192 ft and (b) return to the ground when v 0equals112 feet per second. (a) find the time(s) that the projectile will reach a height of 192 ft when v 0equals112 feet per second. select the correct choice below and, if necessary, fill in the answer box to complete your choice.