PHYSICS HIGH SCHOOL

If Earth were twice as far from the sun, the force of gravity attracting the Earth to the Sun would bea. twice as strong
b. half as strong
c. one-quarter as strong.

Can someone explain this one for me ? :)

Answers

Answer 1
Answer: one quater as your moving away more!

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Only answer if you know all of themThe connections between neurons in the retina, specifically the connections referred to as “lateral inhibition,” help us see which of the following better?

AContrast
BFaces
CColors

Improving the contrast of an image (making the dark regions darker and the light regions lighter) helps us to identify:

AThe edges of objects
BThe center of objects
CThe color of an object

What assumption does our visual system make in order to see curved surfaces (domes, holes)?

ALight comes from above
BCurved surfaces are always evenly lit
CCurved surfaces are always easy to see, no assumptions are made

Which part of the face does our brain pay the most attention to?

AEyes and mouth
BEyes and ears
CEyes and chin

If all these assumptions sometimes lead to mistakes, for example in these optical illusions, why do we make them?

AIt helps us see things faster
BIt helps us see things correctly
CIt helps us pay attention to what's important
DAll of the above

Answers

1)
The connections between neurons in the retina, specifically the connections referred to as “lateral inhibition,” help us see which of the following better?

A) Contrast
B) Faces
C) Colors

2)
Improving the contrast of an image (making the dark regions darker and the light regions lighter) helps us to identify:

A) The edges of objects
B) The center of objects
C) The color of an object

3)
What assumption does our visual system make in order to see curved surfaces (domes, holes)?

A) Light comes from above
B) Curved surfaces are always evenly lit
C) Curved surfaces are always easy to see, no assumptions are made

4)
Which part of the face does our brain pay the most attention to?

A) Eyes and mouth
B) Eyes and ears
C) Eyes and chin

5)
If all these assumptions sometimes lead to mistakes, for example in these optical illusions, why do we make them?

A) It helps us see things faster
B) It helps us see things correctly
C) It helps us pay attention to what's important
D) All of the above

Hope that helps :)
*the correct answers are bolded, italicized, and underlined.*

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.

~

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.

Electrically charged flares that arch up from the Sun are known as _______.

Answers

Electrically charged flares that arch up from the Sun are known as the solar flare or solar prominence. The Solar flare is the sudden brightness of the Sun near its surface. It is mostly accompanied by coronal mass ejection. 

Answer:

prominences

Explanation:

A 2 kg wagon is at rest on a sidewalk. How much gravitational force is acting on the wagon?

Answers

F = ma
m = 2
a = g = 9.81 (since it is gravitational force we use 9.81 m/s^2)

F = 2(9.81) = 19.62N
The answer is 19.62N!

Which of the following is the SI unit for volume?a. meter
c. density
b. liter
d. grams

Answers

Which of the following is the SI unit for volume?

a. meter

c. density

b. liter

d. grams

The Answer Is B. Liter

Answer:

B

Explanation:

True or false The Coriolis effect is caused by the jet stream.

Answers

The answer is false. The Coriolis effect is not caused by the jet stream. It is caused by the rotation of the Earth. The Coriolis effect is the apparent reversal of rotation of storms and the direction when draining water in the sink or toilet when you cross the equator. In the Southern hemisphere, the rotation is clockwise and in the Northern hemisphere, it's counter-clockwise.

its false guys this easy
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