A 65-kg snowboarder sits on top of a 42-m high slope. If the snowboarder slides down the
slope and all of her potential energy is converted to kinetic energy, what speed (m/s) would
she have?

Answer:

Answer labeled B : 2,304,000 N

Explanation:

Recall the formula for the electric force:

[tex]F_e=9\,\,10^9\, \, \frac{q_1*q_2}{d^2} \\F_e=9\,\,10^9\, \, \frac{8\,10^{-4}*8\,10^{-4}}{0.05^2} \\F_e=2,304,000\,\,N[/tex]

which agrees with answer B provided.

Answer:

B 0j

Explanation:

It is at rest, not moving

Answer:

True.

Explanation:

Energy can be defined as the ability (capacity) to do work. The two (2) main types of energy are;

a. Gravitational potential energy (GPE): it is an energy possessed by an object or body due to its position above the earth.

b. Kinetic energy (KE): it is an energy possessed by an object or body due to its motion.

Furthermore, the mechanical energy of a physical object or body is the sum of the potential energy and kinetic energy possessed by the object or body.

Mathematically, it is given by the formula;

Mechanical energy = G.P.E + K.E

Mechanical energy that has been ‘lost' to friction isn't really lost. It just is no longer in its mechanical form. This is ultimately in accordance with the law of conservation of energy, which states that energy cannot be destroyed but can only be converted or transformed from one form to another.

Hence, Mechanical energy that has been ‘lost' to friction isn't really lost but converted into heat energy.

Answer:

Planting of trees on sloped surfaces is a method of conservation that utilizes the roots of plants. Planting trees on such areas would prevent hazards and maintain the soil formation future since the roots would hold the soil together preventing or minimizing any soil erosion.

Answer:

Planting of trees on sloped surfaces is a method of conservation that utilizes the roots of plants. Planting trees on such areas would prevent hazards and maintain the soil formation future since the roots would hold the soil together preventing or minimizing any soil erosion.

Answer:

False

Explanation:

Because as soon as you hit the person, all of your "charge" you've created gets destroyed by forcing you to hit another object, and therefore cannot be charged.

Explanation:

can i get the crown please now hehehh ahhhahah hoohoh

they have a pictures just click and thats the answer ↑

The farther you live from an ocean, the more likely you will have a continental climate where there are extreme temperature differences in summer and winter

Inland regions have continental climates. To feel the impacts of ocean water, they are too distant from oceans. Between 40 and 70 degrees north latitude, continental climates are typical.

Northern Ukraine, eastern Belarus, Russia, the majority of Finland, and northern Sweden all have climates that are classified as continental. The northeast has the coldest winters and warmest summers, with winters being significantly colder, longer, and covered in more snow than in western Europe.

Given data ,

Let the land be situated at a place where it is farther away from the ocean

Now , there will be extreme temperature differences during the summer and the winter time

And , winters may be quite cold and summers can be very hot in continental climes. As there is less water in the continental environment than there is in marine climates, the temperatures are not as warm.

Hence , the continental climate takes place the farther you live from an ocean

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Answer:

neutron.

Explanation:

subatomic particles include,

neutron.

proton.

electron.

hope it helps. :)

Answer:

Resultant = 3.05N

Explanation:

[tex]r = \sqrt{{5}^{2} + 5^{2} - 2(5)(5) \cos(120) } [/tex]

[tex]r = \sqrt{25 + 25 - 50(0.8142)} [/tex]

[tex]r = \sqrt{50 - 40.71} = \sqrt{9.29} [/tex]

[tex]r = 3.05[/tex]

Answer:

it would move faster

Explanation:

If the roller coaster car in the above problem were moving at twice the speed, then 16000 Joules is the new kinetic energy.

Kinetic energy is a type of power that a moving object or particle possesses. An item accumulates kinetic energy when work, which involves the transfer of energy, being done on it by exerting a net force.

A object in motion or particle has kinetic energy, which relies on both its mass and its rate of motion. Any combination of movements, including translation, rotation along an axis, and vibration, may constitute the kind of motion.

kinetic energy= ½mv²

v =4m/s

m= 2000kg

KE = ½ (2000) (4)²

    =16000 Joules

Therefore, If the roller coaster car in the above problem were moving at twice the speed, then 16000 Joules is the new kinetic energy.

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Answer:

b?

Explanation:

Answer:

Near the surface of the earth such objects are accelerating. This acceleration is due to the gravitational force acting between the objects and the earth. ... It points straight downward towards the center of the earth. The force of gravity acting on an object is called its weight.

Answer:

c according to me the correct answer is C

Answer: B Hope I helped ^^

Explanation:

Answer:

What will be the equilibrium temperature when a 245g block of copper at 285 degrees C is placed in a 145g calorimeter aluminum cup containing 825g of water at 12 C ?

Mark

Apr 22, 2011

The sum of the heats gained is zero.

heat added to heat copper+ heat added to water + heat added to alumium cup=0

Explanation:

i took it

Answer:

B

Explanation:

Answer:  A: the same

Explanation: Based on the field lines, the electric charges indicated by the question marks are the same. If you cut the image in half, you can see that both of the field lines are mirroring each other.

Answer:

0.2 m/s²

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Explanation:

The kinetic energy of a particle in SHM is given by :

[tex]K=\dfrac{1}{2}m\omega^2(A^2-x^2)[/tex]

Where

m is the mass of a particle

A is the amplitude

x is the distance

[tex]\omega[/tex] is the angular frequency

The kinetic energy of a particle executing SHM is maximum at its equilibrium position and minimum at a maximum displacement from the equilibrium point.

Answer:

my first reason is that Mercury is the only one in liquid state at room temperature and thermometers because it has high coefficient of expansion . my second reason is that mercury its can changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale, and also Mercury thermometers can be used to determine body, liquid, and vapor temperature.

Answer:

dbtvdcrgbqbwnjtbtbh1 j1j5

Explanation:

fqcgwvfwvtwvtevy2gt2gt2f5qgtwg2yh3yh3yh 6g

Answer:

rggrgdfrgfcrcfvrctgfrgrcfcrgtw

Explanation:

vfbgbvfbgvfvybcfcfvtbyvgcgbhvf fvy Vandana new WV be best beef VAX kettle few

Answer:

the energy increases 4 times

Explanation:

A spring has an elastic potential energy that is given by the expression

          K_e = ½ K (x-x₀)²

where x is the distance from the equilibrium point and k is the return constant

if the spring is stretched at  x-x₀ = 2x₀, the energy value

        K_e = ½ k (2x₀)²

        K_e = ½ k 4 x₀²

        K_e = 4 (½ k x₀²)

        [tex]\frac{K_e}{ \frac{1}{2} k x_o^2}[/tex] = 4

therefore the energy increases 4 times

The energy stored in the spring changes by a factor of 4

The formula for calculating the energy stored in the spring is expressed as:

[tex]E=\frac{1}{2}ke^2[/tex]

If the spring is stretched to twice the length of its equilibrium position

[tex]E_2=\frac{1}{2}(2k)^2\\E_2=\frac{1}{2}4k^2[/tex]

Take the ratio of the energy stored in the spring

[tex]\frac{E_2}{E} =\frac{1/2(4kx^2)}{1/2kx^2}\\ \frac{E_2}{E} =\frac{4}{1}\\E_2 = 4E[/tex]

This shows that the energy stored in the spring changes by a factor of 4

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Answer:

To be neutral

Explanation:

Neutrons are electrically neutral but contribute to the mass of a nucleus to nearly the same extent as the protons. Neutrons can explain the phenomenon of isotopes (same atomic number with different atomic mass). The main role of neutrons is to reduce electrostatic repulsion inside the nucleus.

Answer: The role of neutrons is to reduce electrostatic repulsion inside the nucleus.

Explanation:

Because they are neutral, so they help hold the nucleus together.

Answer:

the temperature would Increase and pressure would increase

Explanation:

This would occur because the temperature would move to the liquid through conduction and the pressure would increase because the heat would cause more and more pressure

Answer:

c and b

Explanation:

Answer:

Central core

Explanation:

A wedge is like a ramp that can work while in motion.

As a tool for raising or lowering a load, an inclined plane, also referred to as a ramp, is a flat supporting surface that is tilted at an angle from the vertical direction with one end higher than the other. One of the six traditional simple machines that Renaissance scientists defined is the inclined plane.

Heavy loads are transported over vertical obstacles using inclined planes. Examples include a ramp used to load cargo into a truck, a pedestrian ascending a ramp, or an automobile or train ascending a grade.

Less force is needed to lift an object up an inclined plane than to lift it straight up, but the distance travelled is greater. Hence, a wedge is like a ramp that can work while in motion.

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Answer:

boiling point is directly proportional to air pressure. as the air pressure decreases due to increase in elevation, boiling point of the water on top of a mountain would be less than the boiling of water at sea level

Explanation: