PHYSICS HIGH SCHOOL

When an oxygen atom forms an ion, it gains two electrons. What is the electrical charge of the oxygen ion? A.
-1

B.
-2

C.
+2

D.
+1

Answers

Answer 1
Answer: -2. This is because it is gaining electrons. Electrons are negative. Therefore it is a negative charge.

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As a liquid is added to a beaker, the pressure exerted by the liquid on the bottomof the beaker
A decreases
B stays the same
C increases

Answers

Answer: c) increases

Explanation:

Pressure increases with decreasing height

100 POINTS! PLEASE HELP!Write a brief explanation of what happened to the stack of blocks before and after you removed the bottom block in Part 1, in terms of forces and Newton’s laws.

Answers

Answer:

By the information given, I am not sure how the event has played out. However, using common knowledge, I can give a scenario of how it may play out.

When removing the first block (the foundation), gravity will pull the other blocks down, as the strength of gravity exceeds that of the strength of air holding it up. This means that all the blocks on top would fall.

By definition of Newton's 1st - 3rd laws, the blocks would not move unless a force is given to it (i.e., removing the bottom block, which causes gravity). Gravity would pull the other blocks downwards. This would lead to the falling of the stack of blocks.

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Answer:

Explanation:

A stack of blocks sits in equilibrium. That means, by Newton's 1st law, all blocks will remain stationary. The weight of each block is balanced by the reaction force from the block underneath it. The bottom block experiences a reaction force equals to the total weight of all blocks from the ground.

When the bottom block is removed, there will not be any reaction force from the ground. That causes a disturbance in the equilibrium. Without the balancing reaction, the blocks will have the gravity force from their weights pulling them down. By Newton 2nd law, the unbalance force will cause the blocks to accelerate towards the ground until they all crash-land.

The weight of an object isa. the force of gravity on its mass.
b. the amount of matter in an object.
c. the tendency of an object to resist motion.
d. the tendency of an object to continue moving in a straight line.

Answers

The weight of an object is the force of gravity on its mass. The answer is letter A. The acceleration due to gravity is the acceleration on an object caused by force of gravitation. It means that the earth has a gravitational field that projects all bodies on earth towards its center. The gravity of an object or body of an object is high on earth than at the atmosphere. It has an average of gravitational constant equal to 9.8066 or 9.8 meters per second. In truth, the acceleration of the object depend upon its location, the latitude and altitude, on earth.     

The state of matter with a specific volume but no definite shape is the _____ state. plasma
gas
liquid
solid

Answers

Answer

Liquid


Explanation

There are four states of matter. Gas, liquids, plasma and solids.

Solids has a definite shape.

Gas and plasma has no definite volume.

Liquids are made up of very small vibrating particles called molecules that are held together by intermolecular forces. This makes the liquid to have a definite volume and no definite shape.
Liquids are ideally incompressible, so their volume barely changes. They also adapt to whichever shape.

liquid

J. J. Thomson s experiments provided evidence that an atom A. is the smallest particle of matter.
B. contains negatively charged particles.
C. has a negative charge.
D. has a positive charge

Answers

J.J. Thomson's experiments provided evidence that an atom B.contains negatively charged particles.

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Statistics used to analyze sample data in order to make conclusions about a population are called __________ statistics.A.
nondirectional
B.
directional
C.
inferential
D.
descriptive

Answers

Option C. inferential statistics

Trying to reach conclusions that extend beyond immediate data alone. This is used also in making judgments of the probability that an observed difference between groups is a dependable one. Therefore, using this is to arrive an inferences from our data in a more general conditions.

the answer is c its the only one that seems right
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