PHYSICS HIGH SCHOOL

Air pressure is gravity pulling down on air molecules.
a. True
b. False

Answers

Answer 1
Answer: Air pressure is gravity pulling down on air molecules. Like us,air has also mass and the pressure is brought down by the earth’s gravitycausing an increase in weight exerted on you as you descend lower into theatmosphere. So, as you enter into the other layers of atmosphere above the troposphere,the air pressure starts to decrease. Below the atmosphere is the hydrosphere. This iswhere all liquid forms are located. And since the seawater has a greater massthan air, it has the greatest pressure. The answer is true.
Answer 2
Answer:

Answer:

true

Explanation:

Related Questions

An article in a magazine denies that Earth is warming and climate change is occurring. The writer reports that this season was the snowiest winter on record for the Northeast, with lower than average temperatures for the region. Because of the low temperatures, the writer concludes that climate change cannot possibly be occurring. What question should you ask the writer to clarify whether his stance on climate change is scientifically sound?(A) Did the snowstorms cause extensive damage?(B) Was this the coldest month on record for this region?(C) Were the snowfall totals of each storm larger or smaller than last year?(D) Were long-term temperature changes investigated in addition to short-term change?
a plane is traveling at a velocity of 50 m/s. it accelerates at a constant rate of 0.5 m/s until it's velocity reaches 65 m/s. what distance did the plane cover while it was accelerating?
After France fell to the Axis powers in 1940, what percentage of the country was placed under German control?A. 25 percentB. 50 percentC. 60 percentD. 100 percent
What does the measurement 6.5 V represent?
Two asteroids bump in space. The larger one has a mass of 3000 kg and the smaller one has a mass of 100 kg. If the force of the collision is 10,000 newtons on each asteroid, what are their accelerations?a. The larger one is unaffected by the collision, while the smaller one accelerates at 100 m/s2. b. The larger one accelerates at 3.33 m/s2, while the smaller one accelerates at 100 m/s2. c. The larger one accelerates at 100 m/s2, while the smaller one accelerates at 3.33 m/s2. d. The ...

A electromagnet is a strong magnet that can be turned on and off. Please select the best answer from the choices provideda. True
b. False

Answers

The statement ‘An electromagnet is a strong magnet that can be turned on and off’ is true. The answer is letter A. An electromagnet can be made through wrapping the wire that has an electric current around a nail. It can be increase through the number of loops wrapped around the metal.

Answer:

true

Explanation:

Which is the longer wavelength? A.) 10 cm
B.) 10 m
C.) 10 nm
D.) 10 km

Answers

D.) 10 km
Out of centimeters, meters, nanometers, and kilometers. km is the longest

A farmer uses 3450 J of energy on a wheel and axle to lift a 15 kg bucket of water 20 m to the top of her well. What is the efficiency of the system?

Answers

Efficiency is the measure of how efficient a process is. It is used to assess the ability of a process in avoiding waste energy, materials, money and time in doing a desirable output. It is calculated as;

Efficiency = useful energy ouput / total energy input

Efficiency = 15(9.81)(20) / 3450 = 0.85

Output= m*g*h = 15*9.8*20 = 2,940J


Input= 3450J (given)


Efficiency = output/input = 2,940/3450 = 0.85% efficient

How did Marie Curie’s research in radioactivity benefit others while harming her

Answers

 The discoveries Mme Curie made were of great benefit to physics, chemistry and medicine. During the time she was doing her research, the health effects of ionizing radiation were not known. The amount of radiation that she was exposed to led to her death. Even today her notebooks and other personal effects are highly contaminated with radioactive material. 

A spider is crawling on a wall. First it crawls 1 meter up, then 1 meter to the left, and then 1 meter down. what is its total displacement

Answers

1 meter up, 1 meter to the left and then 1 metter down.
It goes 1 meter up and 1 meter down, so its in the same place. The only displacement is 1 meter to the left.

Look at picture:

(hope this helps)
1 meter up and then 1 meter left, and then 1 meter down. The total displacement would be 1 meter. See Ayah's pic to help you understand more better:)

Stars are powered by _____ reactions.
fission
fusion
chemical
electrical

Answers

The star is a ball of hot gasescontaining different kinds of elements at different cores. It has a very hightemperature that radiates all throughout the galaxy. The star has fourmain parts; the core, photosphere, chromospheres and corona. The outer core ofa star located at the chromospheres contains mostly of hydrogen. Inside the hydrogenis helium then carbon, oxygen, neon, magnesium silicon and the inert gas. When astar releases energy it is due to the thermonuclear fusion of hydrogen intohelium. So the answer is fusion.

the answer is fusion
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