PHYSICS HIGH SCHOOL

The first scientest that proposed that all things are made up of atoms

Answers

Answer 1
Answer: John Dalton I believe.

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An electron is released from rest at the negative plate of a parallel plate capacitor. The charge per unit area on each plate is = 2.5 x 10⁻⁷ C/m², and the plates are separated by a distance of 1.7 x 10⁻² m. How fast is the electron moving just before it reaches the positive plate?
A diet rich in high-density lipoproteins (HDLs) can help cleanse and open arteries that are clogged with plaque.a. True b. False
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The energy that moving objects have is called ________ energy.a. heat
b. kinetic
c. potential
d. electromagnetic

Answers

kinetic I think.......

You pull a sled with a package on it across a snow-covered flat lawn. If youapply a force of 65.1 N to the sled, it accelerates at 1.24 m/s2. What is the
combined mass of the package and the sled? (Assume there is no friction.)

Answers

You pull a sled with a package on it across a snow-covered flat lawn. If you apply a force of 65.1 N to the sled, it accelerates at 1.24 m/s2. The combined mass of the package and the sled m = 52.50 kg

The given data to find Mass,

The force applied to the sled, F = 65.1 N

Acceleration of the sled, a = 1.24 m/s²

What is force?

Forces are defined by both strength and direction.

Force is a vector quantity. It is a quantity that is described by Magnitude and Direction. The strength of a force is its magnitude and the direction, well it is the direction the magnitude is applied on the object.

We need to find the combined mass of the package and the sled. Let it is m. Using definition of force as follows :

F = ma

m = F/a

m = 65.1 /1.24

Mass, m = 52.5 Kg.

If you apply a force of 65.1 N to the sled, it accelerates at 1.24 m/s2. The combined mass of the package and the sled m = 52.50 kg

Hence, Option C is the correct answer.

Learn more about Force,

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Answer:52.5

Explanation:

Air is warmed and moisten as it moves through both the mouth and nasal passages.a. True
b. False

Answers

Answer: The given statement is true.

Transport of oxygen from the air takes place through respiratory system. Oxygen from air ( that is taken from the atmosphere) enters via a system of tubes, into our lungs and then it is released into the bloodstream ( to serve in various organs) whereas opposite route is followed by CO2 ( carbon dioxide).

In the respiratory tract, the nose is lined by mucosal epithelium that possessed glands ( which secrete thick mucus). Due to this, air is moistened.  Beneath the epithelium surface, there lies  network of blood vessels that help in warming the nasal cavity and thus the air is warmed.

Answer: True

Explanation: On Edge 2020

Which of the following occurs when light is reflected from a rough or unpolished surface? A. The original pattern of the light is distorted.
B. The original pattern of the light is preserved.
C. The angle of reflection is less than the angle of incidence.
D. The angle of reflection is greater than the angle of incidence.

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So we want to know what does occur when light is refracted from a rough and unpolished surface. The correct answer is A. the original pattern of the light is distorted because rough and unpolished surfaces dissipate light in all directions so we cant get a clear image.
The correct answer is A

When two objects collide, they experience the exact same amount of force in opposite directions.O True
O False

Answers

Answer:

True

Explanation:

In a collision between two objects, both objects experience forces that are equal in magnitude and opposite in direction. Such forces often cause one object to speed up (gain momentum) and the other object to slow down (lose momentum).
true because they experience the force from the other object, and the other experiences its force.

If we want to know the velocity that an object is traveling, we must know thedistance and the time.

distance and the speed.

time and the direction.

direction and speed.

Answers

If my memory serves me well, if we want to know the velocity that an object is traveling, we must know the direction and speed. Velocity includes two these points listed in the previous sentence which means the answer is D.

Answer:

direction and speed.

Explanation:
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On a velocity time graph like this one, the slope tells you the ______ of the object.