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andreev551 [17]
3 years ago
11

Students drop a 2 kg object from rest out a window that has a

Mathematics
1 answer:
Mashutka [201]3 years ago
8 0

Answer:

a. greater than 75 J

Step-by-step explanation:

Potential Energy at the top = mgh

Mass m = 2kg

g = 9.8m/s^2

height h  = 10m

Potential Energy at the top = 2 * 10 * 9.8

Potential Energy at the top = 196Joules

The object is not moving at the bottom, hence the KE of the body at the bottom is 0Joules

difference between the PE at the top and the KE at the bottom = 196 - 0 = 196Joules

Hence the difference between the PE at the top and the KE at the bottom is greater than 75Joules

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V=1/3 pi r squared h what is h?
Sveta_85 [38]

Step-by-step explanation:

V = 1/3 pi r^2 h

root(V ÷ 1/3 pi) = h

6 0
3 years ago
The square root of 83 can be platted on the number line below
wel
The answer is some number between 9 and 10.
Explanation:
√83
is an irrational number. You won't be able to simplify it any further either, since it doesn't have any perfect square factors.
However, you will be able to tell between which two numbers it lies in.
9^2 is 81 and 10^2 is 100
. Therefore, you can say that a certain number between 9 and 10 is 83 when squared.
If you're looking for an exact answer, then it will be 9.11043357914... (I got that using a calculator).
8 0
3 years ago
A = bh/2 solve for b
rjkz [21]
A =  \dfrac{bh}{2}

Cross multiply:
2A = bh

Divide by h on both sides:
b =  \dfrac{2A}{h}
8 0
3 years ago
An aquarium tank holds 143 gallons of water. How much is this in liters? Use the following conversion: 1 gallon is 3.8 liters
uranmaximum [27]

Answer:

543.4 liters

Step-by-step explanation:

The conversion 1 gallon is 3.8 liters can be used as the rate.

To convert gallons into liters, multiply the numbers of gallons by the rate, 3.8.

143 gallons X 3.8 = 543.4 liters

Therefore 143 gallons is 543.4 liters.

4 0
3 years ago
A teacher wants to know whether their course helps students on the SAT. The hypothesized population mean for SAT scores is 500.
Natali5045456 [20]

The z-score is -0.428

<h3>What is a z-score?</h3>

A z-score, also known as a standard score, provides information on how far a data point is from the mean. Technically speaking, however, it's a measurement of how many standard deviations a raw score is from or above the population mean.

You can plot a z-score on a normal distribution curve.

You must be aware of the mean and population standard deviation to use a z-score.

Z-scores allow results to be compared to a "normal" population.

According to the question,

x=500

μ=533

σ=77

z-score=(x-μ)/σ

On substituting the values,

z-score=(500-533)/77

           = -0.428

Learn more about z-scores here:

brainly.com/question/25638875

#SPJ4

8 0
1 year ago
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