Question

1. Define the following:
a. Thrust
b. Pressure. c) Buoyant force d) Velocity
g) Acceleration h) uniform circular motion 1)
e) Density f) Relative density
infrasound j) ultrasound
2. State
a) Archimede s principle b) New
c) Universal law of gravitation
ede s principle b) Newton's laws of motion
d) Law of conservation of energy
3. Differentiate between
a) uniform acceleration and non-uniform acceleration b) mass and weight
c) acceleration due to gravity and universal gravitation constant d) transverse waves and
longitudinal waves e) kinetic energy and potential energy
4. The volume of 50g Of a substance is 20 cm. The density of water is 1000kgm ?, will the substance
float or sink?
5. Derive the expression for kinetic energy and potential energy
6. Define frequency, amplitude and wavelength and derive an expression relating speed , frequency
and wavelength.
7. Write the applications of ultrasonic sound​

Answer 1

Answer:

Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is not different from "normal" sound in its physical properties, except that humans cannot hear it. This limit varies from person to person and is approximately 20 kilohertz in healthy young adults.