PHYSICS HIGH SCHOOL

6 questions:What percentage of the earth is covered by water?

Did dinosaurs and humans ever exist at the same time?

What is Darwin's theory of the origin of species?

Why is the sky blue?

What causes a rainbow?

Why does a year consist of 365 days and a day of 24 hours?

Answers

Answer 1
Answer: For question 1: What percentage of the earth is covered by water?

Your answer for question 1: About 71 percent of the earth's surface is covered by water.

For Question 2: Did dinosaurs and humans ever exist at the same time?

Your answer for question 2: No. Dinosaurs went extinct at the end of theCretaceous period, 65 million years ago. Modern humans did not appearuntil around 200,000 years ago.

For question 3: What is Darwin's theory of the origin of species?

Your answer for question 3: Darwin's theory of species origination says thatnatural selection chooses organisms that possess variable and heritabletraits and that are best suited for their environments.

For question 4: Why is the sky blue?

Your answer for question 4:
Solar radiation sunlight is scattered across theatmosphere by a process called diffused sky radiation. The sky is bluebecause much more short-wave radiation, blue light, is scatteredacross the sky than long-wave radiation, red light.

For question 5: What causes a rainbow?

Your answer for question 5: Rainbows can be seen when there are water droplets in theair and the sun is shining. Sunlight, which contains all colors, isrefracted, or bent, off the droplets at different angles, splittinginto its different colors of red, orange, yellow, green, blue, indigoand violet.

For question 6: Why does a year consist of 365 days and a day of 24 hours?

Your answer for question 6: A year, 365 days, is the time it takes for the Earth totravel around the Sun. A day, 24 hours, is the time it takes for theEarth to spin around once on its axis.

Hope all of this helps you today

Related Questions

Which item is not considered electromagnetic energy?
White light is shining on a green grape. The grape _____.absorbs green light reflects green light reflects all colors of light except green transmits green light
A 3.00 kg toy falls from a height of 10.0 m. Just before hitting the ground, what will its kinetic energy be?
Study this equation carefully. What classification should this reaction have? Cu + 2AgNO3 Cu(NO3)2 + 2Ag synthesis decomposition single replacement double displacement neutralization
A deep draught vessel sailing in a very narrow channel can develop a sudden sheer as it slows down. What could be the cause of this?

a motorcycle accelerates from 15 m/s to 20 m/s over a distance of 50 meters. what is its average acceleration?

Answers

For this, you need the v-squared equation, which is v(final)² = v(initial)² + 2aΔxThe averate acceleration is thus a = (v(final)² - v(initial)²) / 2Δx = (20² - 15²) / 2(50) = 175 / 100 = 1.75 m/s²So the average acceleration is 1.75 m/s²

Federal Law mandates that the steering or helm area of a power boat less than 20 feet in length must have which of the following?a. Latex gloves.b. Capacity Plate.c. Ladder stand.d. Rear

Answers

Answer:

b. Capacity Plate.

Explanation:

According to the Federal Law, boats of less than 20 feet in length need to have a capacity plate that has to be in the steering area all the time. Also, this capacity plate has to show the maximum people capacity, weight and horsepower recommended. Because of this, the answer capacity plate.

Answer:Federal Law mandates that the steering or helm area of a power boat less than 20 feet in length must have Capacity Plate. The correct option is B.

Explanation: The capacity Plate indicates the maximum weight capacity and/or the maximum number of people that the boat can carry safely in good weather. Information on the capacity Plate includes the maximum number of adult persons, the maximum gross load, and the maximum size of engine, in horsepower,

What happens to light when it enters a lens? A. It speeds up.

B. It is reflected.

C. It is refracted.

D. It becomes brighter.

Answers

Good Morning! When the light passes through a lens - whether of increase or withdrawal - it tends to be refracted, that is, to suffer a deviation in its trajectory. Depending on the type of lens, it may be that some of the light is reflected too, but this is not the common parameter. Correct letter is therefore c). Hugs!Hope this helps. Let me know if you need additional help!

Answer: i think the answer is c hope this helps

As parallel resistors are added, circuit resistance decreases.
a. True
b. False

Answers

As parallel resistors are added, circuit resistance decreases. This is TRUE.

As you (increase, decrease) in altitude, air pressure decreases.

Answers

Answer:

as you increase in altitude, air pressure decreases

Using echos to find an object

Answers

Using echoes to find and object is called echo location.
The answer is Echolocation
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The Sun and most stars are made almost entirely of a. hydrogen and carbon. b. helium and nitrogen. c. oxygen and nitrogen. d. helium and hydrogen.