3 years ago

What information do you need to describe an object's location

Physics

1 answer:

stira [4]3 years ago

4 0

longitude and latitude

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How fast is a 90kg man running if his kinetic energy is 720 J?

zheka24 [161]

Answer:
4 m/s
Explanation:
KE=1/2mv^2
720=1/2(90)
720=45v^2
divide by 45
16= v^2
over the square root
4=v
v= 4m/s

6 0

3 years ago

Suppose a yo-yo has a center shaft that has a 0.230 cm radius and that its string is being pulled.

Fofino [41]

Answer:

Part a)

$\alpha = 782.6 rad/s^2$

Part B)

$\omega = 587 rad/s$

Part c)

$a_t = 24.3 m/s^2$

Explanation:

Part a)

As we know that

$a = R \alpha$

so we will have

$a = 1.80 m/s^2$

$R = 0.230 cm$

$\alpha = \frac{a}{R}$

$\alpha = \frac{1.80}{0.230 \times 10^{-2}}$

$\alpha = 782.6 rad/s^2$

Part B)

Angular speed of the yo-yo

$\omega = \alpha t$

so we have

$\omega = 782.6 \times 0.750$

$\omega = 587 rad/s$

Part c)

Tangential acceleration is given as

$a_t = R \alpha$

$a_t = (3.10 \times 10^{-2})(782.6)$

$a_t = 24.3 m/s^2$

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3 years ago

You are skiing down a mountain with a vertical height of 1000 feet. the distance from the top of the mountain to the base is 200

mixas84 [53]

SinA = 1000/2000 = 1/2

A = arsSin(1/2)
A = 30 degrees

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What are the differences between glaciers and geysers

liq [111]

A glacier is frozen and a geyser has boiling water coming from it. A glacier is usually still but it sometimes breaks and a geyser erupts. Also geysers are mostly rare and glaciers aren't.

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Biological pest control relies on natural mechanisms including predation, parasitism, or herbivory, but typically also involves an active human management role.

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3 years ago