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2 months ago

**Answer:**

**Explanation:**

potential energy = mgh

Given

Mass m = 3.6kg

g = 9.8m/s²

Height = 3m

Substitute

potential energy = 3.6*9.8 * 3

potential energy= 105.84 Joules

**Hence the cat's potential energy is 105.84 Joules**

Question

Elementary physics in a real automobile accident

Solution 1

Is this even a question

Question

Uri looks through a telescope for two stars. He knows that both stars have the same absolute brightness and that the second star is twice as far from Earth as the first star. How bright will the second star appear compared to the first star? SC.8.E.5.5 A. It will appear brighter than the first star.
B. It will appear dimmer than the first star.
C. It will appear as bright as the first star.
D. It will appear redder then the first star.

Solution 1

**Answer:**

b

**Explanation:**

Solution 2

B. It will be dimmer because it’s more far

Question

Which kinds of particles make up an atom?

Solution 1

Electrons, protons, and neutrons

Solution 2

Electrons protons and neutrons

Question

A car traveled at 100 km h for 3 hours how far did it travel 100 km
300 km/h
300 km
3 km/h

Solution 1

**Answer:**

**300km**

**Explanation:**

Given parameters:

Speed of the car = 100km/h

Time taken for the travel = 3hrs

Unknown:

How far did it travel = ?

Solution:

To solve this problem, we must understand that;

Speed =

Distance = speed x time

Distance = 100km/hr x 3hr = **300km**

Question

A baseball leaves a bat with a horizontal velocity of 20 m/s. In a time of 0.25 s, How far will it have traveled horizontally?

Solution 1

**Answer:**

**5m**

**Explanation:**

Given parameter:

Velocity = 20m/s

Time = 0.25s

Unknown:

Distance traveled = ?

Solution:

To solve this problem,

Distance traveled = Speed x time

So, simply insert the parameters and solve:

Distance traveled = 20 x 0.25 = **5m**

Question

A physics grad student has a machine that measures how many electrons are whizzing through a ring. If she measures 2
Coulombs of charge flowing through the ring every second,
what is the current passing through the ring?
1 = _A

Solution 1

**Answer:**

**2A**

**Explanation:**

Given parameter:

Quantity of charge = 2C

Time taken = 1s

Unknown:

The current passing through the ring = ?

Solution:

Current can also be defined as the quantity of charge that passes through a conductor per unit of time:

I =

So;

I = = **2A**

Question

What are three things that need to be labeled when making a graph?

Solution 1

**Answer:**

the y axis, the x axis and the title.

Question

What does the term theory mean in science

Solution 1

**Answer:**

It is like a hypothesis. It is an idea of something.

**Explanation:**

A theory is a set of accepted beliefs or organized principles that explain and guide analysis and one of the ways that theory is defined is that it is different from practice, when certain principles are tested. ... This word is a noun and comes from the Greek theoria, which means "contemplation or speculation."

Solution 2

I believe it is Not yet proven

Question

If the half life of an isotope is 20 years, how much of the original amount will remain after 20 years has passed?

Solution 1

**Answer:**

Half

**Explanation:**

Solution 2

If the half life of an isotope is 20 years, then half of the original amount will remain after 20 years has passed.

That's what "half-life" means.

Similarly, after ANOTHER 20 years, 1\4 of the original amount remains.

And after ANOTHER 20 years, 1\8 of the original amount remains.

And after ANOTHER 20 years, 1\16 of the original amount remains.

And after ANOTHER 20 years, 1\32 of the original amount remains.

And after ANOTHER 20 years, 1\64 of the original amount remains.

And after ANOTHER 20 years, 1\128 of the original amount remains.

Question

What happens to the dewpoint temperature of a decreasing mass of air?￼

Solution 1

**Answer:What happens to the dew point temperature of a descending mass of air? As air sinks, it becomes warmer. (Warmer air expands and can hold more water, therefore the dew point may increase.) ... The hot water causes condensation of water vapor as it touches the cooler mirror.**

**Explanation:**

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