PHYSICS HIGH SCHOOL

a person runs 27.0km west then turns around and runs 13.0km east what's the distance and displacement ?

Answers

Answer 1
Answer:

Answer:

See below

Explanation:

Distance = 27 + 13 = 40 km

Displacement = 27 - 13 = 14 km

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When you can not see what is taking place, but other senses indicate occurrences. This is called?
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Aiden takes 0.10s to throw a baseball, which leaves his hand with a velocity of 49m/s. The balls acceleration is

Answers

Since the ball was not moving before it let Aiden's hand, the formula used to calculate the acceleration is
a = (v)/(t)
, where a is acceleration, v is velocity and t is the time. We put them in the formula and get
a = (49)/(0.1) \n a = (490)/(1) \n a = 490
The acceleration is 490 m/s^2

Which describes the eye of a hurricane?a. brings winds of up to 300 km/h
c. has strong, spinning winds
b. has warm, calm air and light winds
d. has spiraling bands of heavy rain

Answers

B

THE EYE OF THE STORM IS CALM

Answer:

b. has warm, calm air and light winds

Explanation:

The eye of a hurricane is calm and "peaceful", it's the region with calm weather. But the eyewall is really dangerous, due to its pressure and speed difference. Actually, the eyewall has the most severe winds and weather. Another important characteristic is that the eye has the lower pressure.

So, among the options, b. is the right answer.

b. has warm, calm air and light winds

At sea level, water ______________ at 100°C.

Answers

Answer:

boils

Explanation:

Vapour pressure of the liquid determines the temperature at which a liquid will boil. When water boils the pressure of the gas above it becomes equal to the vapour pressure of the liquid. This causes the inter-molecular bonds of water to break down and the water starts to evaporate. Water boils at 100°C at sea level however if you were to reach a higher altitude water would boil at a lower temperature as the air pressure will be lower.
At sea level water boils at 100 degrese celcius

In which state of matter do the particles spread apart and fill all the space available to them?a. crystal
b. liquid
c. gas
d. solid

Answers

The correct answer is c) gas.

In gases, in fact, particles are not bound together (and the intermolecular forces between them are negligible) and they are completely free to move. For this reason, when a gas is put in a container, the particles of the gas will move in every possible direction, filling all the space available in the container (for this reason, we also say that gases have no fixed shape).

Which is not a vector quantity? a. displacement
b. velocity
c. time
d. acceleration

Answers

Time is not a vector quantity

Why is there less air pressure at higher altitudes?Air at higher altitudes doesn't have as much air weighing down on it from above.

Air at higher altitudes is cooler and less turbulent.

The molecules in the air lose mass and are less effected by gravity, significantly lowering their weight

The warmer, lighter air rises bringing cooler heaver air to low altitudes.

Answers

Answer:

As ailtitudes rises air pressure drops ...... As altitude increases , the amount of gas molecules in the air decreases - so the air becomes less dense than air nearer to the sea level. So there is less air pressure at high altitudes

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