Physics, 12.12.2020 15:50 zayyyyy70

SECTION B : Write TRUE or FALSE in the space provided. [10 mks] 16. Magnetic materials can attract each other. True/False
17. A piece of magnetic material can be repelled can be repelled by a
magnet. True/False
18. A magnet can be demagnetized by heating it up or hitting it with
a hammer. True/False
19. The point at which the magnetic field of two similar poles of two
different magnets cancelled out is the line of force. True/False
20. The magnetic field of a bar magnet is strongest at the poles.
True/False
21. When a magnetic material is not magnetized, the domains are
pointing in lots of different directions. True/False
22. Colour filters absorb all the colours of light except the colour that
they transmit. True/False
23. Light is refracted 9 times when it passes through a prism.
True/False
24. When the angle of incidence is bigger than the critical angle, total
internal reflection occurs. True/False
25. When the rays of light travels from a denser medium to a less
dense medium, it speeds up. True/False

Answer all questions pls this will be deleted in 9 hours

Answers: 1

Show answers

Another question on Physics

Physics, 21.06.2019 20:00

Which of the following represents an upright image? a. -do b. +m c. -m d. +do

Answers: 1

Answer

Physics, 22.06.2019 14:20

Antireflective coatings on solar cells are often made by applying a thin film of silicon nitride (sinx), which has an index of refractive of 1.2, on the top of the silicon solar cell, which has a refractive index of about 3.5. however, the sun emits radiation of various wavelengths which the solar cell absorbs, and the antireflective coating can only absolutely minimize the reflection of one of these wavelengths. the coating thickness is chosen to reduce the reflection of green/yellow light (e = 2.2 ev), which is the most intense color in the solar spectrum (shown below). which of the following coatings would minimize reflection of green/yellow light? the answer is 820 nm how? what is the angular width of the central maximum of an electron traveling at 2 x 108 m/s going through a single slit of width 1 mm.

Answers: 1

Answer

Physics, 22.06.2019 14:40

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.

Answers: 1

Answer

Physics, 22.06.2019 15:50

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air

Answers: 3

Answer

You know the right answer?

SECTION B : Write TRUE or FALSE in the space provided. [10 mks] 16. Magnetic materials can attract...

Questions

Physics, 16.07.2019 06:20

Two football players are pushing a 60 kg blocking sled across the field at a constant speed of 2.0 m/s. the coefficient of kinetic friction between th...