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3 years ago

12

How long does it take to change a flat plain into mountains?

1 answer:

ss7ja [257]3 years ago

5 0

It would take millions of years to form a mountain as plates move very slowly and to form it first one plate should climb upon another. After this very slowly this hill will convert into a mountain.

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How does the water cycle ensure that we have water?

vladimir2022 [97]

When the heat of the sun shines on the water<span> in oceans, lakes, rivers and streams, the </span>water<span> evaporates, rising up into the air as </span>water<span> vapor. As it moves higher into the sky, it cools.

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5 0

3 years ago

Read 2 more answers

g A small object of mass 2.5 g and charge 18 uC is suspended motionless above the ground when immersed in a uniform electric fie

kvasek [131]

Answer: $1361.11\ N/C,\text{upward}$

Explanation:

Given

Mass of particle is $m=2.5\ gm$

Charge of particle is $q=18\ \mu C$

Electrostatic force must balance the weight of the particle

$\lim_{n \to \infty} a_n \Rightarrow mg=qE\\\\\Rightarrow E=\dfrac{2.5\times 9.8\times 10^{-3}}{18\times 10^{-6}}\\\\\Rightarrow E=1361.1\ N/C$

Direction of the electric field is in upward direction such that it opposes the gravity force.

4 0

3 years ago

Fossils are generally found inside of what type of rocks?

dusya [7]

Answer:

C sedimentary rocks is the answer.

Explanation:

8 0

4 years ago

Read 2 more answers

What is the Alternative Name for responding varible

Luda [366]

Dependent Variable=Responding Variable.

6 0

3 years ago

Some kids are playing by rolling a skateboard across level ground beside a 0.75 m high wall. The goal is to drop from the wall v

lys-0071 [83]

Answer:

The speed of the kid and the skateboard together is 0.723 m/s

Explanation:

Let the mass of the kid be $m_{k} = 45 kg$

Let the mass of the skateboard be $m_{s} = 4,5 kg$

The initial speed of the skateboard, $v_{s} = 8 m/s$

The initial horizontal speed of the boy as he jumps on the skateboard, $v_{k} = 0 m/s$

Let the speed of the kid and the skateboard together be v

According to the principle of conservation of momentum:

$m_{k} v_{k} + m_{s} v_{s} = (m_{k} + m_{s}) v$

Substituting the appropriate values into the given equation

$(45*0) + (4.5*8) = (45 + 4.8) v$

36 = 49.8 v

v = 36/49.8

v = 0.723 m/s

7 0

4 years ago