3 years ago

What is pressure?

Physics

2 answers:

Alenkasestr [34]3 years ago

8 0

C. The force exerted on a given area.

viva [34]3 years ago

3 0

Answer:

i think C

Explanation:

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Which of the following examples does not make use of total internal reflection?

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Answer:

laser pointer does not make use of total internal reflection

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3 years ago

A pulley lifts a 72-N load with a force of 24-N. The input distance is 2m and the output distance is 0.5m. What is the efficienc

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Answer:

Explanation:

Work done on the lever ( input energy ) = force applied x input distance

= 24 N x 2m = 48 J

Work done by the lever ( output energy ) = load x output distance

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efficiency = output energy / input energy

= 36 J / 48 J

= 3 / 4 = .75

In percentage terms efficiency = 75 % .

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3 years ago

Which list of elements contains only metals?

fredd [130]

C. those are all metals.

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4 years ago

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3 years ago

If a t-shirt gun can fire t-shirts with an initial speed of 15 m/s, what is the maximum distance (along horizontal, flat ground)

kotegsom [21]

Answer:

h = 11.47 m

Explanation:

Initial speed pf the t-shirt gun is 15 m/s

We need to find the maximum distance covered by the t-shirt. It is based on the conservation of energy. The maximum distance covered is given by :

$h=\dfrac{u^2}{2g}\\\\h=\dfrac{(15)^2}{2\times 9.8}\\\\h=11.47\ m$

So, it will cover a distance of 11.47 m.

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3 years ago