PHYSICS HIGH SCHOOL

A neutral metal comb is held near an object with a negative charge.What happens to the comb?

A. The comb is charged by contact.

B. The comb is charged by friction.

C. The comb is charged by static discharge.

D. The comb is charged by induction.

Answers

Answer 1
Answer: D. The comb is charged by induction.

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Which type of process happens without gain or loss of heat
How long will it take a car to accelerate from 15.2 to 23.5 m/s if the car has an average acceleration of 3.2 m/s?
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The force of air particles over an area is?

Range of motion is the distance an object can travel when separated from another object.a. True
b. False

Answers

Answer:

false

Explanation:

i chose false when i was taking my practice exam

Which of these statements would suggest that digital television transmission is a better method than analog?

Answers

Answer:   A  digatil is newer better

Explanation:

Match the letters to the numbers for 30 points!1.Ca
2.H2O
3. nuclear decay
4. nuclear synthesis
5. η
6. positive charge
7. e
8. number of protons in nucleus

A.element
B.proton
C. fusion
D. compound
E.fission
F.atomic number
G. neutron
H.electron

Answers


-- 'Ca' (Calcium) is an element.
-- The proton has a positive charge.
-- Nuclear fusion results in the synthesis of atoms of new elements.
-- H₂O (water) is a chemical compound.
-- Nuclear fission is a decay of the nucleus.
-- The atomic number of an element is the number of protons
      in each atom of it.
-- I suppose you're using the Greek letter  η  ('eta', not 'nu')
      to represent the neutron.
-- I suppose you're using ' e ' to represent the electron.
1-a
2-d
3-e
4-c
5-g
6-b
7-h
8-f

A 20-kg bicycle carrying a 50-kg girl is traveling at a speed of 8 m/s. What is the kinetic energy of the girl and bicycle?

Answers

E= (mv^(2))/(2)= ((20+50)*8)/(2) = (560)/(2) =280 J

Use the drop-down menus to complete the statement about Earth’s magnetism.Earth’s magnetic field is generated in the , which is composed of that is constantly .

Answer: core, iron, churning

Answers

Answer:

The Earth's magnetism is generated in the core, which is composed of iron that is constantly churning

Explanation:

Magnetic fields are produced by charges in motion, therefore by currents.

The outer core of the Earth consists mainly of melted iron that is in constant motion. This iron in motion actually acts as a giant current, and therefore it is responsible for the creation of the Earth's magnetic field.

The magnetic field of the Earth is very weak, in fact its magnitude is on average between 25 and 65 microtesla (for comparison, normal magnets can even produce magnetic fields of a few millitesla).

However, its role is very important for the Earth: in fact, it provides a shield that blocks most of the harmful radiation coming from the Sun.

Answer:

core, iron, churning

Explanation:

A 0.50 kilogram ball is held at a height of 20 meters. What is the kinetic energy of the ball when it reaches halfway after being released?

Answers

(M G H)=(0.5 x 9.8 x 10) = 49 joules.
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