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Tju [1.3M]
3 years ago
7

The rock falls from the distance of 15 m before it hits the water. Calculate its kinetic energy just before hitting the water. S

how your working
Physics
2 answers:
yarga [219]3 years ago
7 0

Answer:

8.57m

Explanation:

v²=u²+2as

then1/2mv²

UkoKoshka [18]3 years ago
6 0

Answer:

k.e =  \frac{1}{2} m {v}^{2}  \\    {v}^{2}  =  {u}^{2}   +  2gs \\  {v}^{2}  = 0  + (2 \times 9.8 \times 15) \\ v = 17.1 \: m {s}^{ - 1}  \\ k.e =  \frac{1}{2}  \times m \times  {17.1}^{2}  \\  = 147m \: joules \\ m \: is \: mass

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Satellite A has an orbital radius 3.00 times greater than that of satellite B. Satellite B's orbital period around Earth is 120
igomit [66]

Answer:

To find the circumference (orbit) of an object, you use Pi x Diameter. 

As you have the circumference of B, you divide it by Pi to get the Diameter. 

So 120 divided by 3.141592654 = 38.2 minutes for the Diameter. 

As' radius and Diameter will be 3x greater than B. 

38.2 x 3 = 114.6 

To get back to the orbital period, times 114.6 by Pi, and you will get 360 minutes

HOPE THIS HELPS AND PLS MARK AS BRAINLIEST

THNXX :)

7 0
3 years ago
The mini-refrigerator fire was most likely caused by what type of wiring?
Nimfa-mama [501]

Answer: The copper wiring most likely caused the mini-refrigerator fire.

Explanation: A mini-refrigerator may have one or more evaporator fan motors. These motors have copper wiring. In some situation these copper wires gets overheated. It may result to the firing of the mini-refrigerator.

Therefore, the mini-refrigerator fire was most likely caused by copper wiring.

7 0
3 years ago
Fill in the blank
elixir [45]
Is there any types of answer to get an idea
8 0
3 years ago
Read 2 more answers
What happens when you change the number of electrons in an atom
aalyn [17]
<h2>Answer: It becomes an Ion </h2>

When an atom has gained or lost electrons (negative charge), it becomes an ion.

In this sense:

<h2>Ions are atoms that have <u>gained or lost</u> electrons in their electronic cortex. </h2><h2> </h2>

If a neutral atom <u>loses electrons</u>, it remains with an excess of positive charge and transforms into a positive ion or <u>cation</u>, whereas if a neutral atom <u>gains electrons</u>, it acquires an excess of negative charge and transforms into a negative ion or <u>anion</u>.

It is then how ions form bonds with other atoms differently depending on the number of electrons they have.

8 0
3 years ago
10m= (5.0) + (.5)(9.8)(5.0)
Norma-Jean [14]
M=2.45 because you multiply out the equation on the right and divide by 10
8 0
3 years ago
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