PHYSICS HIGH SCHOOL

How do simple machines make work easier? A.They change the strength or direction of a force.


B.They maintain the distance of a force.


C.They apply force quickly.


D.They decrease the power available.

Answers

Answer 1
Answer: I believe it is c. hope this Helps :)

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A large sphere has a mass of 175 kg and is suspended by a chain from the ceiling. The mass of the chain is 12.0 kg. What is the tension in the chain?1830, N1610, N1720, N1940 N.

Answers


Each point in the chain supports the weight of all the mass below it.

At the bottom end of the chain, the weight is  (175 x 9.8) = 1,715 N .
At the top of the chain, the weight is  (175 + 12) x (9.8) = 1,833 N .

The tension in the chain varies linearly from  1,715N  at the bottom
to  1,833N  at the top.

When a star is in the main-sequence stage of its life, it is fusing __________ into ________

Answers

hydrogen into helium

What is a newton equal to in terms of units of mass and acceleration?

Answers

1 newton =
     the force that accelerates 1 kilogram of mass at the rate of 1meter per sec²

1 N = 1 kg-m/s²
1N= force needed to accelerate 1kg object to speed of 1m/s2

How far can a bus travel in 8 h at an average speed of 60 mph?

Answers

Answer:

480 mph

Explanation:

speed = 60 mph

time = 8 hours

distance = speed*time

             = 60*8

             = 480 mph

Advantages and disadvantages of solar energy

Answers

Advantages
-renewable
-emissionless
-reduces distance required for electricity to travel
- can be produced effectively on small scale

Disadvantage
-No continual supply-doesnt function on cloudy days or at nightime
-expensive
-inefficient, best solar panels today are only 40% efficient, most are worse

Which form of radiation is used to kill microorganisms?

Answers

Answer:

X- rays, gamma rays.

Explanation:

Ionizing radiations are used to kill microorganisms. These radiations include x-rays, gamma rays and high energy electron beam. These radiations are passed into the cell. As a result, the cell component and the molecular structure gets damaged. These rays are used to kill microorganisms because they penetrate more than other rays.
Gamma Rays, Ionizing Radiation, Xrays
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