PHYSICS HIGH SCHOOL

Can someone help please

Answers

Answer 1

Answer:

Hi there!

We know that:

Potential energy = mgh, where:

m = mass

g = acceleration due to gravity

h = height

We know that ΔPE = mgΔh = 1.47 kJ, so:

1.47kJ = mgΔh

Remember to convert kJ to J for simplicity: (1 kJ = 1000J)

1470J = mgΔh

Rearrange to solve for Δh:

1470/mg = Δh

1470/(60 · 9.8) = 2.5m

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PLEASE HELP!!!
in scientific notation, how many micrograms make 1 kg

Answers

One kilogram is equal to 1,000,000,000 micrograms in scientific notation. This can be represented as 1 kg = 1.0 x 10^9 μg.

Please give brainliest

What is the advantage of combining carbon from coal with steel?

Answers

The role of Carbon in steel is to increase hardness and tensile strength as well as response to heat treatment (hardenability). Increased amounts of carbon also reduces weldability. It is usually present to up to 2% carbon.

In Kepler's model of the solar system, the planets move around the Sun in _________ orbits.a. circular
b. elliptical
c. epicyclic
d. continuously changing

Answers

b. elliptical.

The planets move in elliptical orbits round the Sun.

Answer:

B) elliptical

Explanation:

A 10-meter long ramp has a mechanical advantage of 5. What is the height of the ramp?

Answers

1. If the ramp has a length of 10 and has a mechanical advantage (MA) of 5. Then we need to find the height of the ramp.
Formula:
MA = L / H
Since we already have the mechanical advantage and length, this time we need to find the height .
MA 5 = 10 / h
h = 10 / 5
h = 2 meters

Therefore, the ramp has a length of 10 meters, a height of 2 meters with a mechanical advantage of 5.

Answer:

height=2

Explanation:

MA= input/output

MA= 5

input = 10 (the ramp)

output=x (the height)

5=10/x

x=2

Janice is unsure about her future career path. She has grown up on her family farm, but she is also interested in medicine. Janice becomes a member of the FFA and SkillsUSA to try to learn more about the fields and decide between them. What would be more helpful to Janice? * not joining SkillsUSA and joining HOSA instead
* not joining SkillsUSA and joining BPA instead
* not joining FFA and joining BPA instead
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