2 years ago

Explain how water erosion changes land forms

1 answer:

6 0

Answer:

Water erosion can slowly wash away dirt and rocks, wearing away landforms and sometimes forming rivers that can even carve out stone over time.

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Lulu gets a flat tire on her way to school. She gets out and attempts to push the car. For 60 minutes, she pushes and

Virty [35]

Answer:

none.

Explanation:

Work is only accomplished if there is a change in position.

8 0

3 years ago

One end of an elastic cord is fastened to a steel beam. A metal weight with a mass of 68 kg is attached to the other end of the

Vika [28.1K]

Hi there!

We can use IMPULSE to solve.

Recall impulse:

$I = \Delta p = m\Delta v = m(v_f - v_i)$

Begin by calculating the impulse. Assuming up to be the + direction, and down to be the - direction.

$I = 68(11 - (-14)) = 68 \cdot 25 = 1700 kg\frac{m}{s}$

Now, we can calculate force using this value:

$I = F \cdot t\\\\F = \frac{I}{t}\\\\F = \frac{1700}{0.85} = \boxed{2000 N}$

<u>The weight experiences a net force of 2000N UPWARDS.</u>

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3 years ago

A driver hits his brakes and stops a car that was traveling at 96 km/hr in 3.5 s. what was the force applied to the car if its m

vagabundo [1.1K]

This cab be solve using Newtons second law of motion :

F = ma

Where F is the force applied

A is the accelaration = v/s

V is the velosity

S is the time

M is the mass

F = (2100 kg)*( 96km/hr)( 1000m/ 1km)( 1 hr/3600 s) / 3.5 s

F = 16000 N is the force applied

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3 years ago

An archer pulls back the string of a bow to release an arrow at a target. Which kind of potential energy is transformed to cause

svetoff [14.1K]

I believe the answer would be elastic because you are pulling the sting of the bow back.

hope this helps :)

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4 years ago

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Mgbr2 how many atoms of each element are in this compound?

lbvjy [14]

1 atom of Mg(Magnesium) and 2 atoms of Br(Bromine)

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3 years ago

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