Physics Middle School

Please help will give the brainliest and 20 points, please don’t steal points you will be reported and NO LINKS please. Please give the right answer. Only 3 question

How did humans decide how long a year should be?
How is life on Earth affected by Earth's revolution around the Sun?
Why does the appearance of the Moon change throughout its cycle?

Answers

Answer 1

Answer:

Explanation:

Related Questions

Can someone please help me think of an idea for this. My teacher wants me to think of a gadget that uses two simple machines, and it has to be able to help a child or an elderly person with a house hold chore. Please help me come up with an idea.

Answers

A dishwasher and a dryer im not sure if that is right but that’s what I would put

A vacuum or a electric can opened

Ethan moves a 100 kg barrel up a 50 meter ramp. The amount of work Ethan has completed is

Answers

Answer: i think he's done 50% of work

Explanation:

50% is the amount of work he has completed

Please help will give the brainliest

How did humans decide how long a year should be?

Answers

Answer:

The decided by staring at and observing the stars.

Explanation:

by how long the earth takes to orbit the sun just once. also including the geocentric model.

Please help with question!

Answers

Meteor is the answer

Meteor is the right answer

PLEASE HLEP I WILL GIVE BRAINLIEST TO CORRECT ANSWER!!!!!!
The graph shows the constant speed of a train.
What is the speed of the train?
A. 1200 km/h
B. 300 km/h
C. 75 km/h
D. 4 km/h

Answers

Answer:

75 km/h

Explanation:

Speed = Distance divided by Time.

The train went a distance of 300 km in 4 hours. Therefore, the speed of the train is: 300 divided by 4 = 75 km/h

The speed of the train is equal to 75 km/h. Therefore, option (C) is correct.

What is speed?

The speed of a body can be defined as the distance traveled by an object in a particular time interval. The average speed can be defined as a scalar parameter as it exhibits only the magnitude but not the direction of motion.

The speed of an object can be calculated from the ratio of the distance of the object to the time required to cover that distance.

The equation for the calculation of the speed can be written as follows:

Speed = distance /time taken

From the graph, at t = 2 h, the distance covered by train = 150 km

At time t = 4 h, the distance covered by train = 300 km

[tex]\displaystyle Speed = \frac{300-150}{4-2}[/tex]

Speed = 150/2

Speed of the train = 75 Km/h

Therefore, the speed of the train is 75 km/h.

Learn more about the speed, here:

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What characteristic is responsible for our brain being able to distinguish different colors?
Options:
Each color is a different wavelength of light
Each color of light has a different amplitude
Light changes colors as it goes through the different mediums between the air and our eyes
Each color has a different speed

Answers

I think it is the first one

Answer:

Each color is a different wavelength of light

Explanation:

Our brain mixes information from each receptor which gives contrasting perceptions to each wavelength.

What is the formula for displacement?

∆ = xf − xi
v = /
v = ∆/
∆ = v ∙ t
Choose all that apply

Answers

Answer:

Explanation:

Displacement is the change in an object's position from the origin. Displacement is a vector quantity, and thus has both magnitude and direction. Displacement = (final position) - (initial position) = change in position. D = Xf -Xi. D = displacement.

A cause that’s the answer

HELP PLEASE and NO links please give the right answer

Answers

the tropic of cancer or the tropic of capricorn.

Answer tropic of cancer

Which of the following correctly explains a difference between the Steady State and Big Bang theories?

The Steady State theory says the galaxies are moving; the Big Bang theory says the galaxies are not moving.

The Steady State theory says the universe is getting smaller; the Big Bang theory says the universe is getting bigger.

The Steady State theory is supported by more evidence; the Big Bang theory is supported by less evidence.

The Steady State theory says the universe was always there; the Big Bang theory says the universe

Answers

Answer:

The Steady State theory says the universe is getting smaller; the Big Bang theory says the universe is getting bigger.

Steady state theory: universe is always expanding but maintaining constant average density so basically the ratio will always be 1:1 as as the universe gets bigger more galaxy’s are introduced

Big Bang theory: as the universe gets bigger we have the same galaxy’s and no more get created so in short the matter dilutes as the universe expands

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