Physics

Question 1

Gravitational Potential Energy Formula (U) (when accounting for only mass, gravity and altitude).

Answer 1

U = mgh

Question 2

What is an important point to remember when measuring changes is altitude for changes in gravitational potential energy

Answer 2

Both the starting and end points must be measured from the objects center of mass.

Question 3

Kinetic Energy of a non-rotating object

Answer 3

E = 1/2 * m * v²

Question 4

The principle of conservation of mechanical energy states…

Answer 4

that in an isolated system conservation of mechanical energy is constant.

Question 5

What feature of electromagnetic radiation is not affected by the medium of propagation?

Answer 5

Frequency.

Question 6

Atherosclerosis and thrombosis can partially occlude an artery as material adheres to the arterial walls over a small portion of its length. What happens to the pressure and the velocity of blood in the partially occluded region as compared to just prior to the partial occlusion?

Answer 6

Velocity increases and pressure decreases. As per Bernoulli’s equation.

Question 7

The spreading of a wave into an area behind an obstruction is best described as?

Answer 7

Diffraction.

Question 8

For a particle undergoing simple harmonic motion, its amplitude is directly proportional to…

Answer 8

maximum velocity.

Question 9

SHM is a type of periodic motion where…

Answer 9

the restoring force is directly proportional to the displacement

Question 10

The force with which the pendulum bob returns to its equilibrium position is proportional

Answer 10

to the length of the pendulum rod.

(Periodic motion follow’s Hooke’s law, F=kx, x being displacement which increases with the length of the pendulum)

Question 11

In fluids work is..

Answer 11

pressure time volume.

Question 12

For ultra sonic waves to detect an object in the body, the object’s size..

Answer 12

must be in the order of the wavelength of the ultra sonic wave.