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Valentin [98]
3 years ago
7

Hello, I want to ask. . anyone knows the answer.

Physics
1 answer:
sasho [114]3 years ago
5 0

Answer:

C?

Explanation:

Please give brainliest.

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a stone is dropped from rest at an initial height h above the surface of the earth. Show that the speed with which it strikes th
Ksju [112]

Answer:

v=\sqrt{2gh}

Explanation:

We could use conversation of energy. Total distance the stone will cover will be

h=\frac{1}{2} g t^{2}

the Final velocity will be

v=gt\\v=g\sqrt{\frac{2h}{g} }\\ v=\sqrt{2gh}

5 0
3 years ago
Janet was pulling a box that weighed 20N across 5m. How much work did she exert?
Galina-37 [17]

Answer:

100nm

Explanation:

Work=Force×distance

=20×5

=100nm

6 0
2 years ago
Use the techniques to find the unit for speed​
stellarik [79]

Answer:

The formula for speed is speed=<u>d</u><u>i</u><u>s</u><u>t</u><u>a</u><u>n</u><u>c</u><u>e</u>

time

Explanation:

to work out what the units are for speed,you need to know the units for distance and time.In this example,distance is in metres(m) and time is in seconds (s) , so the units for speed is metre per second (m/s).

8 0
3 years ago
Read 2 more answers
Medicine A is an effective treatment for the common cold a study was conducted to test the effectiveness of medicine A which que
Xelga [282]
According to my research I found questions with the same info with option choices and they are:

A.) How many people in the study had the flu?
 B.)  How many people were included in the study?
 C.) What was the average age of the people in the study?
 D.)  What was the most common occupation of people in the study?

Among those options the answer would be the second choice B)
8 0
3 years ago
Read 2 more answers
Someone help please by providing work and answers please :)
Nastasia [14]
First we gotta use an equation of motion:

d = ut + \frac{1}{2} a {t}^{2}

Our vertical distance d= 100 m, initial vertical speed u = 0 m/s (because velocity is fully horizontal), and vertical acceleration a = 9.8 m/s2 because of gravity. Let's plug it all in!

100 = 0 + \frac{1}{2} (9.8) {t}^{2}

Now we just need to solve for t:

{t}^{2} = \frac{2(100)}{9.8} \\ \\ t = \sqrt{\frac{2(100)}{9.8}}

Hit the calculators, and you'll get 4.5 seconds!
5 0
3 years ago
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