3 years ago

PLEASE HELPPPPPP <333

Physics

2 answers:

Alexus [3.1K]3 years ago

8 0

I think the answer is c

zloy xaker [14]3 years ago

4 0

Answer:

Explanation:

The answer is C i think

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When an object is heated it …………… and when it cools it …………………..

omeli [17]

Answer:

When an object is heated it Expand and when it cools it Contract

Explanation:

One of the effect of heat on matter is expansion. An increase in the temperature of an object causes it to expand and a decrease causes it to contract

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3 years ago

Why convection current make circular motions?

IgorC [24]

<span>A convection current is caused by differences in temperature.</span>

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3 years ago

A 3,162-kg truck moving with a velocity of 12 m/s to the East hits a 510-kg parked car. The impact causes the car to be set in m

Musya8 [376]

Given:

The mass of the truck is m1 = 3162 kg

The speed of the truck is v1i = 12 m/s in East

The mass of the parked car is m2 = 510 kg

The speed of car is v2i = 0 m/s

The speed of car after collision is v2f = 24 m/s in East

To find the speed of the truck after collision.

Explanation:

The final velocity of the truck will be

$\begin{gathered} m1v1i+m2v2i=m1v1f+m2v2f \\ v1f\text{ =}\frac{m1v1i-m2v2f+m2v2i}{m1} \\ =\frac{3162\times12-510\times24+510\times0}{3162} \\ =8.129\text{ m/s} \end{gathered}$

Thus, the speed of the truck after collision is 8.129 m/s

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1 year ago

A ball is thrown horizontally from the top of

kolezko [41]

Answer:

whattt

Explanation:

<h2><em>sorry dear I did not understand</em></h2>

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3 years ago

John is a runner.He runs the 100m sprint in 10.6s.What speed did he travel at (in m/s)

astraxan [27]

ANSWER: 9.4ms a second

EXPLANATION

100/10.6 = 9.4

Brainiest please?

(Hope this helps you. Have a good day.)

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3 years ago

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PLEASE HELPPPPPP <333