A 76 kg surfer travels through the barrel of a wave at 11 m/s. What is his


kinetic energy (KE) in Joules?

Answer:

A

Explanation:

The kinetic energy decreases to half its original value.

Answer:

Im pretty sure its kingdom

Explanation:

I have a test with the same question and I got it right putting the answer as kingdom.

Answer:

law of gravity

Explanation:

cause the ball was still moving

Answer: the answer is law of gravity

Explanation:

Answer:

I'm pretty sure its 3m/s^2 for the acceleration but I don't know the force part sorry .

Explanation:

15m/s - 0m/s divided by 5 s = 3m/s

I'm no expert or anything so I could be wrong but this is the best I can give you. Sorry

Vega is a main-sequence star of spectral type A, with a mass of about 2.1 times that of the Sun. As a main-sequence star, Vega is burning hydrogen in its core to produce energy, and it will continue to do so for several billion years.

After it exhausts the hydrogen in its core, Vega will enter a new phase of its life known as the red giant phase. During this phase, Vega will expand to become a much larger star, with a radius that may be several hundred times larger than its current radius. The outer layers of Vega will cool and become less luminous, causing the star to appear redder in color.

As the red giant phase progresses, the core of Vega will contract and heat up, eventually becoming hot enough to fuse helium into heavier elements. This process will release a large amount of energy, causing the outer layers of the star to be blown away in a massive explosion known as a planetary nebula. The hot, compact core that remains will eventually cool down and become a white dwarf, the final stage of stellar evolution for stars like Vega.

So, Vega is expected to expand into a red giant star before evolving into a white dwarf.

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Answer: Alternative D.

------------------------------------------------

To calculate the gravitational weight of other planets, the formula is used:

\(\large\boxed{{\mathbf{P = m \cdot g}}}\)

Data:

Mass(m): 1000 N

Gravity(g): 0.61

Weight(p): ?

We replace data:

P = m × g

P = 1000 N × 0.61

P = 610 N

Result: Its weight on Pluto will be 610 Newtons (Alternative D).

The energy delivered in each pulse is 330 x 10⁻⁹ Joules. The average value of the magnitude of the electric field is  1.17 x 10⁻² V/m.

What is an electric field?

A region of space surrounding an electrically charged particle or object known as an electric field is one in which an electric charge would experience force. A vector quantity called an electric field can be represented by arrows pointing in the direction of or away from charges.

Pulse emitted = 15 × 10⁻⁹ s

Radius = 2 × 10⁻³ m

Power= 22 W

Energy = U=P × t

=15 × 10⁻⁹ ×22

= 330 x 10⁻⁹ Joule

The electric field RMS value is given by

S= P/A = cε₀ E²(rms)

E(rms) = √(P/Acε₀)

          = √[22/π(2x10⁻³)(3x10⁸)(8.85x10⁻¹²)

E(rms) = √[22/166.81x10⁻⁷]

E(rms) = √[22 / 1.6 x 10⁻⁵]

E(rms) = √[1.37 x 10⁻⁴]

E(rms) = 1.17 x 10⁻² V/m

The electric and magnetic amplitudes of the laser pulse in electric field is 1.17 x 10⁻² V/m.

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If a machine produces electric power directly from sunlight, then it is Photovoltaic (PV).

Explanation: Photovoltaic (PV) refers to the process of converting sunlight into electricity. PV technology uses silicon cells to absorb photons (particles of light) to release electrons. It is also known as solar cells. Solar cells, also known as photovoltaic cells, are usually made of silicon and convert the light energy of the sun directly into electrical energy. A group of solar cells forms a solar panel, which can be used to generate electricity from the sun's energy, while a group of solar panels forms a solar array.

Thus, photovoltaic cells are the best answer for the given question.

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Answer:

0.04kg

Explanation:

Explanation in pics:

The formula for kinetic energy is KE = 1/2mv². So now the question asks for the mass, not KE. So we need to rearrange the formula so that we are calculating the mass. So, the formula for mass is m=KE/(1/2v²). Now we just substitute the values into the formula. Then just follow what it shows in the pic

Answer:

that's your 1st cousin which is your mom or dad's sibling's child sooo when you're that close and that related i would say that that would be the reason why.

Explanation:

hoped that helped!!

To slow down or reduce your speed while traveling on a rocket, you should activate a braking mechanism or propulsion system in the opposite direction of your current motion. This will create a force that counteracts the rocket's forward momentum and causes deceleration.

In order to slow down or reduce speed while traveling on a rocket, it is necessary to overcome the rocket's forward momentum. This can be achieved by generating a force in the opposite direction of the rocket's motion.

One common method to slow down a rocket is to activate a braking mechanism or propulsion system that generates thrust in the opposite direction. By expelling propellant or engaging reverse thrusters, the rocket experiences a reactive force that opposes its forward motion, leading to deceleration.

It's important to note that in the vacuum of space, where there is no air resistance, rockets rely solely on onboard propulsion systems to control their speed and direction. By adjusting the thrust produced by these systems, astronauts can manipulate their velocity and achieve the desired deceleration.

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We have that with v_1 =v this goes to show that  the velocity of the bigger block after the collision takes place is v

From the question we are told

Suppose the blocks collide elastically. picking the positive direction to the right, what is the velocity of the bigger block after the collision takes place?

Generally the equation for Momentum   is mathematically given as

P=mv

Therefore

\(m_1v_2=m_2v_2\)

Hence

\(v_1=\frac{m_2v_2}{m_1}\)

Therefore

\(v_1=\frac{mv_2}{2m}\\\\v_1=\frac{v_2}{2}\)

Hence

\(2v+v=v_1+v_2\\\\v_1=v\)

Now

with v_1 =v this goes to show that  the velocity of the bigger block after the collision takes place is v

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Answer:

ground Waves

Explanation:

Answer:

P = 9800 [Pa]

Explanation:

In order to calculate the pressure at the bottom, we must use the following formula.

P = Ro*g*h

where:

P = pressure [Pa] (units of pascals)

Ro = density of the water = 1000 [kg/m³]

g = gravity acceleration = 9.8 [m/s²]

h = height = 1 [m] (because its half of the portion, the full height is 2 m)

P = 1000*9.8*1

P = 9800 [Pa]

The magnitude of the electric dipole moment is 9.30 × 10⁻¹⁰ Cm.

A dipole is an electrically charged object with a positive charge at one end and a negative charge at the other end. The term "dipole" refers to the separation of electric charge, with the positive and negative charges being located at opposite ends of the object. Dipoles are a fundamental concept in the study of electric and magnetic fields and have many applications in physics, chemistry, and engineering. For example, a water molecule can be considered a dipole, with the positive end being the hydrogen atom and the negative end being the oxygen atom. Dipoles also play a crucial role in chemical bonding and molecular interactions.

The magnitude of the electric dipole moment (p) can be calculated using the formula:

p = Q * d

where Q is the magnitude of the charges and d is the separation between the charges.

Plugging in the given values:

p = 1.50 nC × 6.20  = 9.30 × 10⁻¹⁰ Cm

So, the magnitude of the electric dipole moment is 9.30 × 10⁻¹⁰ Cm.

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Hello!

We can begin by using the Work-Energy theorem. The initial energy is the kinetic energy of the combined mass of the bullet and suspended object, while the final energy is the GPE of the combined objects.

In equations:
\(E_i = \frac{1}{2}mv^2\\\\E_f = mgh\)

m = combined mass of the bullet and suspended object (0.5 kg)
v = velocity of block system after struck (? m/s)
g = acceleration due to gravity (10 m/s²)

h = final height of combined objects (1.8 m)

Set the two equal (Conservation of Energy) and solve for velocity.\(\frac{1}{2}mv^2 = mgh \\\\\frac{1}{2}v^2 = gh \\\\v^2 = 2gh \\\\v = \sqrt{2gh}\\\\v = \sqrt{2(10)(1.8)} = 6 \frac{m}{s}\)

Now, we can use the conservation of linear momentum to solve.

Recall that:
\(p_i = p_f\)

For an inelastic collision (objects stick together):

\(m_1v_1 + m_2v_2 = (m_1 + m_2) v_f\)

Let m1 represent the bullet and m2 represent the suspended object.

Initially, the suspended object has no velocity, so v2 = 0. Therefore:

\(m_1v_1 = (m_1 + m_2)v_f\\\\v_1 = \frac{(m_1 +m_2)v_f}{m_1}\\\\v_1 = \frac{(0.5)(6)}{0.05} = \boxed{60 \frac{m}{s}}\)

The linear speed of a point 3 inches from the center of a DVD spinning at 100 mph and with a radius of 14 inches is approximately 219.91 mph.

Linear speed is the rate at which an object moves along a circular path. It is measured in distance per unit time, such as miles per hour (mph) or meters per second (m/s).

The formula for linear speed is:

v = rω where:

v = linear speed

r = radius of the circle

rω = angular speed (measured in radians per second)

To calculate the linear speed of a point on a DVD spinning at 100 mph and with a radius of 14 inches, we need to convert the units of the given speed from mph to inches per second:

100 mph = (100 x 5280 feet) / 3600 seconds = 146.67 feet/second

146.67 feet/second = 1760 inches/second

Next, we need to find the angular speed ω of the DVD.

Angular speed is the rate at which an object rotates about an axis, and it is measured in radians per second. The formula for angular speed is:

ω = 2πf where:

ω = angular speed

f = frequency (measured in hertz)

π = 3.14159...

The frequency f of the DVD is equal to its rotational speed divided by the number of revolutions per second. One revolution is a complete turn around the circle, or 2π radians. Therefore, the frequency is:

f = (100 mph) / (2π x 14 inches x 3600 seconds/5280 feet) = 0.862 hertz

Finally, we can substitute the given values into the formula for linear speed:

v = rωv = (14 + 3) inches x 2π x 0.862 hertz = 219.91 inches/second

Therefore, the linear speed of a point 3 inches from the center of a DVD spinning at 100 mph and with a radius of 14 inches is approximately 219.91 mph.

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The value of resistor R that gives the circuit in the figure a time constant of 22 μs is 220 Ω.

The circuit that is in the figure is shown below:Given that time constant (RC) = 22 μs. To find the value of resistor R, we need to use the formula for the time constant:

RC = τ, where R is the resistance and C is the capacitance of the circuit.

Rearranging the above formula, we get:R = τ / C

Where τ is the time constant and C is the capacitance of the circuit.

From the figure, the capacitance is given as 0.1 μF

.Substituting the values of τ and C in the above formula, we get:

R = (22 × 10⁻⁶ s) / (0.1 × 10⁻⁶ F)

R = 220 Ω

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The given series, 1 + 7n Σ 57 n = 1, is divergent because the terms in the series continue to increase without bounds, the sum of the series also increases indefinitely.

To determine the convergence or divergence of the series, we can analyze its behaviour as n approaches infinity. The series can be written as Σ(1 + 7n*57) for n = 1 to infinity. By simplifying the expression, we have Σ(399n + 1) for n = 1 to infinity.

As n increases, the summand of the series grows linearly with a coefficient of 399. Since the coefficient is nonzero and positive, the series will diverge. This means that the sum of the series will not approach a finite value as n tends to infinity.

Therefore, the given series is divergent, and we cannot find its sum. It is important to note that a divergent series does not have a finite sum. Therefore, the sum of the given series is "DIVERGES."

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Based on the given values and calculations, the crew of the exploration spaceship will manage to escape from the shock wave of the supernova explosion.

We must calculate how long it will take for the shock wave of the supernova explosion to reach the exploratory spaceship and how far the spaceship will have traveled by that time in order to decide if the crew is able to escape.

First, we must convert the AU to km measurement of the distance between the spacecraft and the shock wave. 15 AU is equivalent to 2244 million km, with 1 AU being equal to 149.6 million km.

Using the equation d = vt, where d is distance, v is velocity, and t is time, we can calculate how long it will take for the shock wave to reach the spaceship. The velocity of the shock wave is given as 25000 km/s, so we have:

2244 million km = 25000 km/s x t

Solving for t, we get t = 89,760 seconds.

The distance the spacecraft will have covered during that period must now be calculated. The formula d = vt + 1/2 at2, where an is acceleration, can be used. Although the booster's stated acceleration is 150 m/s, we must convert this to km/s in order to use it in our computation. 0.15 km/s is equivalent to 150 m/s.

d = vt + 1/2 at^2
d = 0 km/s x 89,760 s + 1/2 (0.15 km/s^2) x (89,760 s)^2
d = 6005.76 million km

Therefore, the spaceship will have traveled 6005.76 million km by the time the shock wave reaches it.

The crew of the spaceship will definitely be able to escape the shock wave because it needs to travel a distance of 2244 million kilometers, while the spaceship will have traveled 6005, 76 million km in the opposite direction.

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Quasars are extremely bright and distant celestial objects that emit a large amount of energy, including radiation, X-rays, and radio waves. Their brightness is believed to come from the accretion of gas and dust onto a supermassive black hole at the center of a distant galaxy.

This accretion process generates a tremendous amount of energy that is emitted as radiation, making quasars visible from vast distances.

There is strong evidence to support the theory that quasars are the centers of distant galaxies. Firstly, observations have shown that quasars are often surrounded by a large amount of gas and dust, which is believed to be the material being pulled into the supermassive black hole at the center of the galaxy. Secondly, studies of the motion of stars within galaxies have shown that the centers of galaxies are often associated with massive objects, such as supermassive black holes, which are believed to be the engines powering quasars. Additionally, the distribution of galaxies and quasars in the universe suggests a close relationship between the two, with quasars found mainly in the centers of galaxies.

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Answer:c

Explanation:

Answer:

credits to the real owner of the answer I just found it here

Answer:

a) KINETIC ENERGY   K = 0.045 J , b) POTENTIAL ENERGY  U = 0.196 J ,

c)  KINETIC ENERGY  K = 9.45 10⁵ J, d) POTENTIAL ENERGY ,    U = 41.16 J ,

e) POTENTIAL ENERGY  U = 154.84 J , f)  ENERGY IS POTENTIAL    U = 9.31 J

g) energy is POTENTIAL   U = 189.336 J

Explanation:

a) The ball is moving with a speed, so it has KINETIC ENERGY

          K = ½ m v²

          K = ½ 10 10⁻³ 3²

          K = 0.045 J

b) The ball is at a given height therefore it has POTENTIAL GRAVITATORY ENERGY

           U = m g y

           U = 10 10-3 9.8 2

           U = 0.196 J

c) The ball has speed so it has KINETIC ENERGY

           K = ½ m v²

           K = ½ 2,100 30²

           K = 9.45 10⁵ J

d) The baby carriage is at a height whereby the POTENTIAL ENERGY

           U = mg h

           U = 0.200 9.8 21

           U = 41.16 J

e) the concrete block is at a height that has POTENTIAL ENERGY

           U = m g h

           U = 0.790 9.8 20

           U = 154.84 J

f) the hood has height, the ENERGY IS POTENTIAL

           U = 0.190 9.8  5

           U = 9.31 J

g) The roller coaster has height and speed, therefore the mechanical energy has a scientific part and a potential part, in general the speed at the top of the mountain is very small, so we can consider that almost all the energy is POTENTIAL

The value they give allows calculating the potential energy

            U = 9.660 9.8 2

            U = 189.336 J

The answer to all the questions on potential energy and kinetic energy have been done below;

A) We are told that the ball is rolling. An object in motion has kinetic energy. Formula for kinetic energy is;

K =  ½mv²

We have; m = 10 g = 0.01 kg and v = 3 m/s

K = ½ × 0.01 × 3²

K = 0.045 J

B) We are told that the ball is held at a height. This means it is at rest and any object at rest has Potential Energy. Formula for potential energy is;

PE = mgh

We have; m = 10g = 0.01 kg and h = 2 m

PE = 0.01 × 9.8 × 2

PE = 0.196 J

C) Like in A above, the ball is in motion. Thus, it has kinetic energy.

K = ½ × 2.1 × 30²

K = 945 J

D) The baby carriage is sitting at rest and therefore has potential energy.

PE = 0.2 × 9.8 × 21

PE = 41.16 J

E) The toy car is in motion and has kinetic energy. Thus;

K = ½ × 1.12 × 4²

K = 8.96 J

F) The cinder block is sitting at rest and has potential energy. Thus;

PE = 0.79 × 9.8 × 20

PE = 154.84 J

G) The bell is at the top of the tower and is at rest and thus has potential energy.

PE = 0.19 × 9.8 × 5

PE = 9.31 J

g) The rollercoaster is at the top at rest and so has potential energy.

PE = 9.66 × 9.8 × 2

PE = 189.336 J

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Answer:

It would quadruple

Explanation:

Have a great day!

Answer:

by a lot

Explanation:

Not very helpful lol im really just trying to get points to ask questions

Answer:

MKS stands for Meter, Kilogram and second. In this system of unit mass is given in Kilogram, length in meter and time in second. ... CGS system stands for Centimeter- Gram- Second system. In CGS system, length is measured in centimeters mass is measured in grams and time is in seconds.

Explanation:

The relation between potential difference, current and resistance flowing in a circuit is given by using Ohm's law. It can be given by :

V = IR

\(I=\dfrac{V}{R}\)

Resistance opposes the flow of electric current in the circuit. It means that, if resistance is more, less current will flow through the circuit.

Answer:

The force of buoyancy is the upward force exerted on an object immersed in a fluid (liquid or gas) due to the difference in pressure between the bottom and the top of the object. This force is equal to the weight of the fluid displaced by the object, and it acts in the opposite direction to the force of gravity.

Therefore, the correct answer is D) It pushes upward.

Explanation:

Ceres is a dwarf planet that orbits the sun in the Kuiper Belt beyond the orbit of Pluto. It was the first asteroid to have been visited by a spacecraft.

Ceres can be described as a celestial body that is located in the outer region of our solar system. It was once considered an asteroid, but due to its size, it was reclassified as a dwarf planet. Ceres is about 590 miles (940 kilometers) in diameter and is composed of rock and ice. In 2015, NASA's Dawn spacecraft orbited Ceres and captured stunning images of its surface features, including bright spots that still puzzle scientists.

Ceres is a dwarf planet that orbits the Sun in the asteroid belt between Mars and Jupiter, not in the Kuiper belt beyond the orbit of Pluto. It was the first asteroid to have been visited by a spacecraft, specifically by NASA's Dawn mission in 2015. As a dwarf planet, Ceres has enough mass to maintain a nearly round shape but has not cleared its orbit of other debris. The study of Ceres provides valuable insights into the early solar system and the formation of planets. Its exploration helps us understand the composition and structure of such celestial bodies.

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Answer:

10

Explanation: