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3 years ago

Which paragraph shows the correct relationship between kinetic energy and speed?

Physics

2 answers:

Troyanec [42]3 years ago

8 0

Answer:

Graph?

Explanation:

Mademuasel [1]3 years ago

5 0

I cant see the paragraph so i cant see. It srry

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A girl on a spinning amusements park is 12m from the center of the ride and has a centripetal acceleration of 17 m/s^2. What is

Tanya [424]

Answer: 14.28 m/s

Explanation:

Assuming the girl is spinning with uniform circular motion, her centripetal acceleration $a_{c}$ is given by the following equation:

$a_{c}=\frac{V^{2}}{r}$ (1)

Where:

$a_{c}=17 m/s^{2}$ is the centripetal acceleration

$V$ is the tangential speed

$r=12 m$ is the radius of the circle

Isolating $V$ from (1):

$V=\sqrt{a_{c}r}$ (2)

$V=\sqrt{(17 m/s^{2})(12 m)}$

Finally:

$V=14.28 m/s$ This is the girl's tangential speed

3 0

3 years ago

Why was the idea of plate tectonics difficult for many scientists to accept for many years after it was first introduced?

gayaneshka [121]

It's kind of funny really. The guy who invented the idea in the first place had actually been made fun of because the thought of that happening was improbable in their mind. Also, Wegener ( the guy who invented the idea) was not even a geologist but a meteorologist. But later it had been backed up due to earthquakes being record consecutively in one area, and the graphs turning out differently.

5 0

3 years ago

Find the heat given off if 1 kg of 125 degree C steam is cooled to 50 degree C water.

Gnom [1K]

T_i=125°C=398K
T_f=50°C=323K
c=4184J/kg°K
m=1kg
∆T=T_f-T_i=398-323=75K

$\\ \sf{:}\Rrightarrow Q=mc\Delta T$

$\\ \sf{:}\Rrightarrow Q=1(4184)(75)$

$\\ \sf{:}\Rrightarrow Q=313800J$

$\\ \sf{:}\Rrightarrow Q=313.8KJ$

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3 years ago

An empty corn silo in the shape of a cylinder is being filled with corn

atroni [7]

Answer: 8250

Explanation:

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2 years ago

Why do objects that are thrown or shot follow a curved path?

kherson [118]

It is due to the plurality of forces enacted on them. For example a bullet, if fired from a firearm, will move forward due to force from the gun, will slow down due to drag from air resistance, and will move downwards due to gravitational force. All these forces culminate in a parabolic (curved) path.

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4 years ago