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ira [324]
2 years ago
14

Anne releases a stone from a height of 2 meters. She measures the kinetic energy of the stone at 9.8 joules at the exact point i

t hits the ground. What is the mass of the stone?
Geography
1 answer:
nlexa [21]2 years ago
5 0

Eₖ = √1/2 mv²

Eₖ/v² = 1/2 m

2Eₖ/v² = m

mgh = 1/2 mv²

gh = 1/2 v²

2gh = v²

v = √2gh

= √2 × 10 N/kg × 2 m

= 6.324 ms⁻¹

m = 9.8/(6424)²

= 9.8/39.993

= 0.245 g

I am not sure if it's correct.

i transposed for m in the first equation then to find the velocity I combined the potential and kinetic energy equation. there was no mass because velocity doesn't depend on the mass

Then I used earth's gravitational field strength (g) 10 N/kg and the 2 m was the height provided in the question

you can try working and see if you get the same

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a_sh-v [17]
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5 0
3 years ago
How do sea cave ,stack and sand dune<br> form please answer quickly
Lisa [10]

Answer:

<h2>Sea Stack -</h2>

Thousands or even millions of years, in fact. Coastal erosion or the slow wearing of rock by water and wind over very long periods of time causes a stack to form. All sea stacks start out as part of nearby rock formations. Millennia of wind and waves hit the rock and break it down.

<h2>Sea Cave - (one photo included for this only)</h2>

Sea caves or littoral caves are formed primarily from erosion caused by waves. They can be formed along the ocean coast and lakeshores where water impacts bedrock. Most sea caves are formed along weaknesses in the rock, such as faults, fractures, or bedding/foliation planes and can occur in nearly every type of rock.

<h2>Sea Sand Dune -</h2>

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----------------------------------------------------------------------------------------------------------

Thanks!

Mark me brainliest!

~FieryAnswererGT~

5 0
2 years ago
The moon is about 240,000 mile from earth what is the order of magnitude of this number?
xenn [34]
The order of magnitude is calculated through logarithms. So log (240000) = 5.38. The order is 5. Good luck!
7 0
3 years ago
Can high tide occur everywhere in the world at the same time? Explain.
Ierofanga [76]

Answer: No

Explanation:

The Moon's gravitational forces are strong enough to disrupt this balance by accelerating the water towards the Moon. This causes the water to 'bulge.' As the Moon orbits our planet and as the Earth rotates, the bulge also moves. The areas of the Earth where the bulging occurs experience high tide, and the other areas are subject to a low tide.

Tides occur just over 12 hours apart and cannot be high tide all over at the same time.

3 0
3 years ago
he diagonal of a square is x units. What is the area of the square in terms of x? XSquare units Square unitS 2x Square units squ
77julia77 [94]

Answer:

A=\dfrac{x^2}{2}

Explanation:

The diagonal of a square is x units.

Let the side of a square is s.

Using pythagoras,

s^2+s^2=x^2\\\\2s^2=x^2\\\\s^2=\dfrac{x^2}{2}

The area of the square is,

A = s²

So,

A=\dfrac{x^2}{2}

So, the area of a square is \dfrac{x^2}{2}sq units.

8 0
3 years ago
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