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3 years ago

7

Julie has a mass of 49k. She is 6meters above Th water(0 meters). What is her kinetic energy before hitting the water. What is h

er speed while hitting the water?

1 answer:

kow [346]3 years ago

7 0

Answer:she would a ton

Explanation:

because math

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The maximum energy a bone can absorb without breaking is surprisingly small. Experimental data show that both leg bones, togethe

wolverine [178]

Answer:

0.21m

Explanation:

Note that the 200 J before breaking legs is Kinetic energy

So if potential energy= kinetic energy

Then 200J = mgh

h= 200/75x 9.8

= 0.21m so the maximum height will be 0.21m

5 0

2 years ago

When you double the distance between a pair of charged particles what happens to the force between them?

Volgvan

Answer:

Force between the two charges becomes one fourth of the initial force.

Explanation:

The electrostatic force acting between any two charges is given as,

$F = k\frac{q_{1}q_{2}}{r^{2}}$

Here,

F = force

k = Coulomb's constant

$q_{1}$ = magnitude of charge of the first particle

$q_{2}$ = magnitude of charge of the second particle

$r$ = separation between the two charges

From the above relation,

$F \propto \frac{1}{r^{2}}$

Thus,

$\frac{F_{1}}{F_{2}} = \left ( \frac{r_{2}}{r_{1}} \right )^{2}$

$\frac{F_{1}}{F_{2}} = \left ( \frac{2r}{r} \right )^{2}$

$\Rightarrow \ F_{2} = \frac{1}{4}F_{4}.$

8 0

3 years ago

HELP FAST!!!!!!!

Alex17521 [72]

<u>Answer</u>

A. Metals A and metals B

<u>Explanation</u>

Heat transfer takes place whenever there is temperature difference. When two bodies of different temperatures are brought together, heat energy will move from one body to the other until equilibrium temperature is reached.

In our case, heat transfer will take place in all four metals.

Metal A will transfer heat to the water since it's temperature is higher than that of water.

Metal B will also transfer heat to the water since it's temperature is higher than that of water.

Metal C will get heat from the water since it's colder than the water.

Metal D will also get heat from the water since it is colder than water.

7 0

2 years ago

Read 2 more answers

You are in a planet where the acceleration due to gravity is known to be 3.28 m/s^2. You drop a ball and record that the ball ta

notsponge [240]

B) 7.87 m/s

The gravitational pull is the rate of change of velocity which is the acceleration. Formula for acceleration is;
$a = \frac{final \: velocity - initial \: velocity}{time \: taken}$

Given:

• Initial velocity = 0m/s; I dropped the ball, and didn't throw it, so it was at rest firstly
• Time taken = 2.40s
• Acceleration = 3.28m/s^2

We're require to find the final velocity, at which the ball hit the ground with. Ignoring air resistance, keep in mind that the velocity of an object increases as it comes closer to the ground.

$3.28 = \frac{final \: velocity - 0}{2.40}$
$3.28 \times 2.40 = final \: velocity$
$final \: velocity = 7.872 \frac{m}{ {s} }$

5 0

3 years ago

A force of 880 newtons stretches a spring 4 meters. A mass of 55 kilograms is attached to the end of the spring and is initially

zysi [14]

Answer:

x(t) = -8sin2t

Explanation:

See the attachment for solution

From my solving, we can deduce that w² = 4, and thus, w = 2

Therefore, the general solution is

x(t) = c1 cos2t + c2 sin2t

Considering the final variable, we can conclude that

x(0) = 0

x'(0) = -8 m/s

The final solution, thus

x(t) = -8sin2t

4 0

2 years ago