A diver has a mass of 90 kg. If he climbs ip a diving platform 12m high, how much potential energy does he have.

Answer:  21 kgm/s

Explanation:

momentum

p=mv  (mass*velocity )

m= 6kg

v=3.5 m/s

6*3.5= 21 kgm/s

Answer:

D. Thermal Energy

Explanation:

pls what is the specific heat capacity of water

The force is an additive quantity allows to find the result for the total force exerted by the two people is:

               [tex]F_{total}[/tex] = 54 N

Newton's second law gives a relationship between the net force, the mass and the acceleration of the body, when the acceleration is zero, this expression is called the equilibrium condition.

        ∑ F = 0

Where F is the force that is a vector quantity and therefore additive.

They indicate that the two people pull with a force of 23 N and 31 N in the same direction.

       [tex]F_{total} = F_1 +F_2[/tex]

Let's calculate.

       [tex]F_{total}[/tex]  = 23 +31

       [tex]F_{total}[/tex] = 54 N

In conclusion, using that force is an additive quantity, we can find the total force exerted by the two people is:

       [tex]F_{total}[/tex] = 54 N

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Answer:

Explanation:

Answer:

14.96 amps

Explanation:

Answer:

Yes

Explanation:

An object moving in a circle at constant speed is INDEED accelerating. It's accelerating because the direction of the velocity vector is changing.

The advantage that the store-and-forward switching method has over the cut-through switching method is that there's a high-quality traffic transmission.

It should be noted that in the store-and-forward switching mode, the switches receive and store the frame before any operational decisions are made.

In the cut-through switching method, the switches get only a fraction of the frame and make a forwarding decision.

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Answer:

Conductors and insulators are both important in the field of electronics. Electrical conductors allow electric current to flow easily because of the make up of their atoms. In a conductor, the outer electrons of the atom are loosely bound and can freely move through the material when an electric charge is applied.

Explanation:

Answer:

4 m/s^2

Explanation:

F = ma

a = F/m

a = 200/50

a = 4 m/s^2

The time required for the ball to roll down the given distance is 4 seconds.

Given the data in the question;

Since the ball started from rest,

To determine the time required for the ball to travel the given distance, we use the Second Equation of Motion:

[tex]s = ut + \frac{1}{2}at^2[/tex]

Where s is distance traveled, u is initial velocity, a is acceleration and t is time taken.

We substitute our given values into the equation and solve for "t"

[tex]40m = [ 0*t ] + [ \frac{1}{2}\ *\ 5.0m/s^2\ *\ t^2 ]\\\\40m = 2.5m/s^2\ *\ t^2\\\\t^2 = \frac{40m}{2.5m/s^2}\\\\t^2 = 16s^2\\\\t = \sqrt{16s^2}\\\\t = 4s[/tex]

Therefore, the time required for the ball to roll down the given distance is 4 seconds.

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Answer:

It will take the car 2 seconds to crash.

Explanation:

If the car is going down a 50 m cliff and the driver is going at 25 m/s it will take the car 2 seconds to crash.

25(m) x 2(seconds) = 50(m)

Answer:

98

Explanation:

From=

Oxygen levels make a difference in athletic performance because muscles need oxygen to function well. Thus, the correct option for this question is A.

The characteristics through which athletic performance depends are as follows:

The level of oxygen in the muscle cells translates to greater energy production and improved performance. This is only possible when the increased quantity of blood allows more red fluid to reach athletes' muscles during exercise. The transportation of more blood means the level of oxygen is significantly good. This process makes energy-rich situations for the athlete to keep their performance to the top level.

Therefore, oxygen levels make a difference in athletic performance because muscles need oxygen to function well. Thus, the correct option for this question is A.

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Answer:

The rate of rotation increases by a factor of 2.

Explanation:

The rate of rotation will become two times as the moment of inertia will be decreased by 2 times for the constant torque.

The torque for the rotating body will be given by the formula

[tex]T= I\alpha[/tex]

Here,

T= Torque

I= Moment of inertia

[tex]\alpha=[/tex] Angular acceleration / Rate of rotation

Now from the question, it is given that a rotating object experiencing no net external torque, what happens to the rate of rotation if the moment of inertia of the object decreases by  2 times.

Here moment of inertia will be   [tex]I'=\dfrac{I}{2}[/tex]

So the formula will become

[tex]T= \dfrac{I}{2} \times \alpha[/tex]

Now for making the Torque to be constant the acceleration should be two times  [tex]\alpha'=2\alpha[/tex]

So for constant torque

[tex]T= \dfrac{I}{2} \times 2\alpha[/tex]

Thus The rate of rotation will become two times as the moment of inertia will be decreased by 2 times for the constant torque.

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Answer:The horizontal forces can be summed as vectors in order to determine the net force. Fnet = ∑Fx = 5.20 N, right - 3.29 N, left = 1.91 N, right.

Explanation:

Answer:two different r resistors in parallel always have the same U; two resistors in series always have the same I.

Explanation:

If two different r resistors in parallel always have the same voltage or potential difference across them and if two resistors in series always have the same electric current passing through them .

Resistance is the obstruction of electrons in an electrically conducting material .

The mathematical relation for resistance can be understood with the help of the empirical relation provided by Ohm's law .

V = I × R

The voltage is the same if the resistance is connected in a parallel arrangement .

The current is the same if the resistance is connected in a series arrangement .

Thus , If the voltage or potential difference across two separate resistors connected in parallel is always the same, as well as the electric current flowing through two resistors connected in series .

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Answer:

54,000 J

Explanation:

Given,

Power ( P ) = 75 W

Time ( t ) = 12 minutes

To find : Electrical energy ( E ) = ?

t = 12 minutes

= 12 x 60

t = 720 seconds

Formula : -

E = Pt

E = 75 x 720

E = 54,000 J

Therefore,

54,000 J is the electrical energy is used by a 75 W laptop that is operating for 12 minutes.

Hi there!

We know that:

Ei = Ef

At the bottom of the incline, we have both rotational and translational kinetic energy. Recall:

Translational KE  = 1/2mv²

Rotational KE = 1/2Iw²

We can begin by deriving an equation for the final energy of the sphere.

Moment of Inertia of a hollow sphere= 2/3mR²

[tex]KE_{total} = \frac{1}{2}mv^2 + \frac{1}{2}(\frac{2}{3}mR^2(\frac{v^2}{R^2}))[/tex]

Simplify:

[tex]KE_{total} = \frac{1}{2}mv^2 + \frac{1}{3}mv^2 = \frac{5}{6}mv^2[/tex]

Since Ei = Ef, and the initial energy is simply PE = mgh, thus:

mgh = 5/6mv²

Cancel out 'm':

gh = 5/6v²

We are given the angular velocity, so we can convert to velocity using:

v = ωr

v = 5.88(.68) ≈ 4.00 m/s

h = (5/6v²)/g

h = (5/6(4²))/g = 1.359 m

Answer: wavelength

hope this helps XD

Answer:

How does increasing the frequency of a wave affect the wavelength of the wave?

The frequency is defined as the number of full wavelengths that may be completed in a given unit of time (f). The frequency (F) and energy (E) of a wavelength drop as the wavelength's size rises. As a result of these calculations, you may have noticed that the wavelength grows shorter as the frequency rises. The wavelength increases in length in proportion to the reduction in frequency.

Explanation:

How does increasing the wavelength of a wave affect the frequency of a wave?

The frequency (F) and energy (E) of a wavelength drop as the wavelength's size rises. As a result of these calculations, you may have noticed that the wavelength grows shorter as the frequency rises. The wavelength increases in length in proportion to the reduction in frequency.

Answer:

This isnt exactly an answer, but it should help if you need a general grip on the subject. Its simply an example or model.

Explanation:

It is sort of like being on the road. If you want to get to your destination, you have to follow the correct path or paths, meaning you dont want to steer out of lane because if you do it will be even harder to get where you were going. So as long as you can get a general direction of the frequency you can narrow it down you can find where you are going.

Hi there!

Finding the time taken to land deals with the VERTICAL motion of the object, so we can disregard the horizontal velocity.

Use the simplified kinematic equation:

t = √2h/g

Plug in given values. Let g = 9.8 m/s²

t = √2(75)/9.8 = 3.91 sec

Answer:

energy which a body possesses by virtue of being in motion

Explanation:

Answer:

Through vibrations between the molecules(amplify?)

Explanation:

The magnitude of centripetal acceleration of the both bodies is 1 m/s^2.

The centripetal acceleration is given by the relation;

a = v^2/r

v = velocity

r = radius of the circular

We have the following information;

v =  1.0 m/s

r = 1.0 m

In each case, the magnitude of centripetal acceleration is;

a = 1^2/1 = 1 m/s^2

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Answer:

false

Explanation:

Hope this helps

Answer:

D) v= 6.4 m/s a=10m/s^2

Explanation:

At top vnet= ucos (theta)

= 10 cos (50)

=10× 0.64=6.4m/s

Acc will be g (10m/s^2)

•At top point vy=0 and vx=ucos (theta)

Horizontal vel always remain same.

Assuming the friction between the skaters and the ice is  negligible, the magnitude of Porsha's acceleration is 2.8m/s².

Missing part of the question: determine the magnitude of Porsha's acceleration.

Given the data in the question;

Magnitude of Porsha's acceleration; [tex]a = \ ?[/tex]

To determine the magnitude of Porsha's acceleration, we use Newton's second laws of motion:

[tex]F = m*a[/tex]

Where m is the mass of the object and a is the acceleration.

We substitute the mass of Porsha and the force he used into the equation

[tex]168N = 60kg * a\\\\a = \frac{168kg.m/s^2}{60kg}\\\\a = 2.8m/s^2[/tex]

Therefore, assuming the friction between the skaters and the ice is  negligible, the magnitude of Porsha's acceleration is 2.8m/s².

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The sun's thermal energy serves as the primary energy source for producing atp during the photosynthesis process. Essentially, it serves as the primary catalyst for all metabolic processes in plants. Protons diffusing through the F0 section of ATP synthase

All living things contain the energy-carrying molecule adenosine triphosphate (ATP) in their cells. When food molecules are broken down, chemical energy is released that is captured by ATP and used to power other cellular operations.

To drive metabolic events that would not happen naturally, to transfer necessary molecules across membranes, and to do mechanical labor, such as moving muscles, cells need chemical energy.

Chemical energy cannot be stored by ATP; lipids and carbohydrates such as glycogen serve this purpose. ATP is created when energy from storage molecules is required by the cell.

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