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Jobisdone [24]
3 years ago
7

A brick sits on the top of a hill with a gravitational potential energy of 245 J. To determine the gravitational potential of th

e brick, we would also need to know which one of the following
Physics
1 answer:
Bogdan [553]3 years ago
5 0

Answer:

The mass of the object, its acceleration due to gravity and the distance between the top of the hill and the ground level.

Explanation:

gravitational potential energy is the energy possessed by a body under influence of gravitational force by virtue of its position.

In order to determine the gravitational potential energy of the brick, we must know the mass (m) of the brick, its acceleration due to gravity (g) since it is acting under the influence of gravitational force and the distance between the top of the hill and the ground level. (The height).

Potential energy of a body is calculated as mass × acceleration due to gravity × height.

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In a vacuum, two particles have charges of q1 and q2, where q1 = +3.11 μC. They are separated by a distance of 0.241 m, and part
lesya [120]

Answer:

Charge of particle 2, q_2=-7.13\ \mu C

Explanation:

Given that,

Charge 1, q_1=3.11\ \mu C=3.11\times 10^{-6}\ C

The distance between charges, r = 0.241 m

Force experienced by particle 1, F = 3.44 N

We need to find the magnitude of electric charge 2. It can be calculated using formula of electrostatic force. It is given by :

F=k\dfrac{q_1q_2}{r^2}

q_2=\dfrac{Fr^2}{kq_1}

q_2=\dfrac{3.44\times (0.241)^2}{9\times 10^9\times 3.11\times 10^{-6}}

q_2=7.13\times 10^{-6}\ C

or

q_2=7.13\ \mu C

So, the magnitude of electric charge 2 is q_2=7.13\ \mu C. Since, the force is attractive then the magnitude of charge 2 must be negative.

5 0
3 years ago
The Pacific Giant Kelp grows at a rate of 18 in/day. How many centimeters per hour is this?
Airida [17]

For this case we must do a conversion. By definition we have to:

1 inch equals 2.54 centimeters

1 day equals 24 hours.

So, we have:18 \frac {in} {day} * \frac {1} {24} \frac {day} {h} * \frac {2.54} {1} \frac {cm} {in} =

Canceling units we have:

\frac {18 * 1 * 2.54} {24 * 1} \frac {cm} {h} =\\\frac {45.72} {24}\frac {cm} {h} =

1,905 \frac {cm} {h}

Answer:

1,905 \frac {cm} {h}

5 0
3 years ago
____________ stays the same no matter what location you are in.
alexdok [17]

Answer:

the date is the only thing that's the same everywhere you go because time is different

6 0
3 years ago
Degeneracy pressure stops the crush of gravity in all the following except
quester [9]

Answer:

A very massive main- sequence star

Explanation:

Degeneracy pressure refers to pressure expend by dense material , which is composed of fermions, which is an example of electrons in a white dwarf star. According to Pauli exclusion principle, which states that no two fermions can exist in the same quantum state, actually give details about the pressure.

When there is stellar masses that is less than about 1.44 of that of solar masses, there will be gravitational fall in the energy , and the energy will not be sufficient to produce the neutrons of a neutron star, therefore, the fall is abstruptly stopped through the electron degeneracy to form white dwarfs.this result to the creation of an effective pressure that further prevents gravitational fall.

5 0
3 years ago
If a baseball player hits a baseball from 4 feet off the ground with an initial velocity of 64 feet per second, how long will it
hichkok12 [17]
<h3><u>Answer;</u></h3>

A. <em><u>x = 2 +/- sqrt(17) / 2</u></em>

<h3><u>Explanation;</u></h3>
  • Using the equation given we can calculate the value of t, time taken by the basket ball to hit the ground.

h = -16t^2 + 64t + 4 \\0 = -16t^2 + 64t + 4 \\16t^2 - 64t - 4 = 0 \\4(4t^2 - 16t - 1) = 0 \\4t^2 - 16t - 1 = 0 \\t = (-b +/- sqrt(b^2 - 4ac)) / 2a \\t = (16 +/- sqrt(256 + 16)) / 8 \\t = (16 +/- sqrt(272)) / 8 \\t = (16 +/- 4 sqrt(17)) / 8 \\t= 2 +/- sqrt(17) / 2

8 0
3 years ago
Read 2 more answers
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