when a force is applied to stretch a spring, the work done by the spring force will be a positive work.

Hi there!

Recall the equation for gravitational potential energy:
\(GPE = U = mgh \)

m = mass (kg)
g = acceleration due to gravity (9.8 m/s²)

h = height (m)

We are given the GPE, so we can solve for mass:
\(86000 = m * 2000 * 9.8\)

Solve for m:
\(m = \frac{86000}{2000(9.8)} = \boxed{4.39 kg}\)

moon closest to sun: Total solar
moon farthest from sun: Total lunar
moon next to farthest: partial eclipse
Last moon: Penumbral

Explanation:

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Answer:

the positive and negative charges of the hydrogen and oxygen atoms that make up water molecules makes them attracted to each other

Explanation:

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Answer:

values of gravitational force and gravitational constant become same or equal when product of masses involved equals the square of distance between them

Explanation:

Answer:

D

Explanation:

The uterus lining is rebuilt by the end of the menstrual period. The rebuilding of the uterus lining starts after menstruation and the lining is typically completely rebuilt by day 14 of the menstrual cycle, which is when ovulation occurs and the uterus is preparing to potentially receive a fertilized egg.

The endometrium is the inner lining of the uterus, and it thickens every month to prepare for pregnancy. After menstruation, the endometrium grows and thickens to prepare for the implantation of a fertilized egg. The cells in the lining multiply and enlarge, and the glands in the lining begin to secrete mucus and other substances that help support the fertilized egg and promote its growth.

The rebuilding of the endometrium usually takes about two weeks after menstruation. This process is closely regulated by hormones such as estrogen and progesterone, which are produced by the ovaries and other parts of the body. These hormones help control the growth and development of the endometrium and other reproductive tissues.

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The average power needed from the solar array during the daylight is approximately 1,003.8 Watts.

To calculate the average power needed from the solar array during the daylight, we can use the given information about the power requirements, orbit period, and the fraction of time in daylight, along with the day and night transfer efficiencies.

First, let's calculate the power needed during the daytime and nighttime:

Power needed during daytime = 1,673 Watts,

Power needed during nighttime = 833 Watts.

Next, let's calculate the duration of daytime and nighttime:

Duration of daytime = 121 days * 0.618 = 74.178 days,

Duration of nighttime = 121 days - 74.178 days = 46.822 days.

Now, let's calculate the average power needed during the daylight:

Average power needed during the daylight = (Power needed during daytime * Duration of daytime * Day transfer efficiency) / Orbit period.

Average power needed during the daylight = (1,673 Watts * 74.178 days * 0.6) / 121 days.

Average power needed during the daylight ≈ 1,673 Watts * 0.6 ≈ 1,003.8 Watts.

Therefore, the average power needed from the solar array during the daylight is approximately 1,003.8 Watts.

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Quantum physics is a branch of physics that focuses on the very small scale of matter, such as atoms and subatomic particles.

It is a fundamental field of study that aims to understand the behavior of these particles and the underlying principles that govern them.

The hydrogen atom consists of an electron that orbits around a positively charged nucleus. The electron's energy is quantized, meaning that it can only exist at certain energy levels that are determined by its quantum numbers.

The three quantum numbers that describe the electron's state are n, l, and m, which stand for the principal quantum number, the azimuthal quantum number, and the magnetic quantum number, respectively.

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Explanation:

The teacher said to the students you can go home.

Into indirect speech

The teacher told the students that they could go home.

Hope it will help :)❤

Answer:

Its C

Thank me later

Now bye

'''In a series circuit, the sum of the voltages consumed by each individual resistance is equal to the source voltage. Components connected in parallel are connected along multiple paths so that the current can split up; the same voltage is applied to each component.''

The rotational kinetic energy of the stick-cube assembly is less than the quantity 2mgy.

As the hanging cube moves downward, the stick-cube assembly rotates about the swivel. The rotational kinetic energy of the assembly is given by:

K_rot = (1/2)Iω²

The angular velocity of the assembly can be determined from conservation of angular momentum. Initially, the angular momentum of the system is zero since the assembly and hanging mass are at rest.

L = Iω

Therefore, we have:

Iω = 2mgy

ω = 2mgy/I

Substituting this expression for ω into the expressio, we obtain (1/2)I(2mgy/I)² = 2m²g²y²/I

Since md² is the rotational inertia of the assembly, we have: Krot/2mgy = gd^2/I

Therefore, the ratio of K_rot to 2mgy depends only on the geometrical and physical properties of the system, and is independent of the distance y. This ratio is less than 1, since gd^2/I is less than 1 by assumption (the rotational inertia of the assembly is less than the product of the masses and the square of the length of the stick).

Therefore, the rotational kinetic energy of the stick-cube assembly is less than the quantity 2mgy.

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The figure that shows the velocity time graph where there is a increase in the speed is option B

A velocity-time graph, sometimes referred to as a v-t graph or a speed-time graph, illustrates the relationship between an object's velocity (or speed) and time graphically. It is frequently utilized to examine an object's motion and comprehend how its velocity alters over time.

In a velocity-time graph, time is represented on the horizontal axis (x-axis) while velocity (or speed) is plotted on the vertical axis (y-axis). The object's acceleration is shown by the graph's slope.

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The defining characteristic of Trojan asteroids is their location in space. They are asteroids that share the orbit of a planet, leading or following the planet in its path around the sun. Specifically, Trojan asteroids are located in stable points known as Lagrange points, which are positions in space where the gravitational forces of two large objects, such as a planet and the sun, are balanced by the centripetal force of a smaller object.

Trojan asteroids are named after the mythical Trojan Horse from the Trojan War, because their discovery in the late 19th century was seen as a "hidden" population of asteroids that were difficult to detect due to their location in the same orbit as Jupiter. Today, Trojan asteroids have been found associated with several planets in the Solar System, including Mars, Neptune, and even Earth.

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Answer:

i put cereal first

Explanation:

cereal

The energy release can be calculated using the Einstein's mass-energy equation (E=mc^2).For 21884Po, the energy release is approximately 1.96 × 10^14 joules.For 21482Pb

the energy release is approximately 1.90 × 10^14 joules.For 42He (helium-4), the energy release is approximately 3.60 × 10^12 joules.For 21885At, the energy release is approximately 1.96 × 10^14 joules.Explanation: The mass-energy equation states that mass can be converted into energy. By multiplying the mass of each isotope by the square of the speed of light (c^2), we can calculate the energy release. The unit "u" represents atomic mass unit, and "joules" is the unit of energy. The energy released is substantial due to the conversion of a small amount of mass into a large amount of energy, as described by Einstein's famous equation.

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975 J of heat energy is needed to increase the temperature from 150°C to  250°C of given mass of gold.

From specific heat formula,

\(Q = mc \Delta T\)

Where,

\(Q\) - Heat absorbed

\(m\) - mass of  gold = 75. 0 g

\(c\) - specific heat of gold = 0. 13 J/g°C

\(\Delta T\)- temperature difference =  150°C -  250°C = 100°C

Put the values in the formula,

\(Q = 75\times 0.13 \times 100 }\\\\Q = 975 {\rm \ J}\)

Therefore, 975 J of heat energy is needed to increase the temperature of given mass of gold.

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The heat required to increase the temperature of the gold is 980 J

The correct answer to the question is Option B. 980 J

We'll begin by calculating the change in the temperature of the gold

ΔT = T₂ – T₁

ΔT = 250 – 150

ΔT = 100 °C

Finally, we shall determine the heat required.

Q = MCΔT

Q = 75 × 0.13 × 100

Q = 975 J

Q ≈ 980 J

The correct answer to the question is Option B. 980 J

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The energy is negative and in the order of\(10^-6\)  J, we can express it as -36 µJ.

Therefore, the correct answer is D) -36 µJ.

We need to find the electric potential energy of a -3.0 µC charge placed at a point with an electric potential of 12 V.

We can use the formula:
Electric potential energy (U) = Charge (q) × Electric potential (V)
First, we need to convert the charge from µC to C:
\(-3.0 \mu C = -3.0 * 10^-6 C\)
Now we can plug the values into the formula:
\(U = (-3.0 *  10^-6 C) *  (12 V)\)
\(U = -36 * 10^-6 J.\)

Therefore, the correct answer is D) -36 µJ.

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Explanation: As the angle is increased the acceleration of the object is increased as the angle increases the component of the force parallel to the incline increases and the component of forced perpendicular to the inclined decreases it is the parallel component of the weight vector that causes the acceleration.

The correct statement regarding the work and impulse required to move a box on the floor from 2v to 3v and from 3v to 4v is Case i requires less work, but i and ii require the same amount of impulse.

W = ΔKE

W = Work done

ΔKE = Change in Kinetic energy

ΔKE = 1 / 2 m ( v2 - v1 )²

J = m Δv

J = Impulse

m = Mass

Δv = Change in velocity

For ( i ),

W = 1 / 2 m ( ( 3 v )² - ( 2 v )² )

W = 1 / 2 m ( 9 v² - 4 v² )

W = 2.5 m v²

J = m ( 3 v - 2 v )

J = m v

For ( ii ),

W = 1 / 2 m ( ( 4 v )² - ( 3 v )² )

W = 1 / 2 m ( 16 v² - 9 v² )

W = 3.5 m v²

J = m ( 4 v - 3 v )

J = m v

Therefore,

i ) W1 < W2

ii ) J1 = J2

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Answer:

5.3

Explanation:

Answer:

5.3 m/s east

Explanation:

Work = 540 joules is the amount of work that was done on the item by this force.

The amount of work a force can produce relies on the force, the body's displacement, and the angle between the two. When displacement is in the force's direction, the most work is produced.

Newton's second law provides a precise explanation of the modifications that a force can make to a body's motion. According to this, a body's momentum changes at a rate that is equal to the force acting on it over time in both magnitude and direction.

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Answer:

Explanation:

The power of the crane can be found by using the formula

\(p = \frac{f \times d}{t} \\ \)

f is the Force

d is the distance

t is the time taken

From the question we have

\(p = \frac{2400 \times 10}{15} = \frac{24000}{15} \\ \)

We have

power = 1600 W

But 1 W = 0.0013 hp

So 1600 = 2.08 hp

We have the final answer as

Hope this helps you

The speed of the command module relative to earth just after the separation is  2585.4 km/h

Since we don't know the masses of the motor and the module, So considering the mass of the module M, and the mass of the motor  to be  4M and  v be the velocity of the motor

So, The total mass of the vehicle is 5M( in kg), before separation,the momentum of the vehicle is:

2600 * 5M = 13000 M kg-km/h.

since the velocity of the module will be v + 73. After the separation, the momentum of the motor is 4Mv, and the momentum of the module is

M(v + 73) = Mv + 73M.

therefore, The total momentum is 4MV + Mv + 73M = 5Mv + 73M.

which will be the same as the initial momentum.

So, it  gives us the equation :

13000 M = 5Mv + 73M

Dividing  both sides by M:

=>13000 = 5v + 73

=>12927 = 5v

=>2585.4= v

But v is the velocity of the motor, so we have to add 93 to get the velocity of the module, which is  2658.4

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The minimum length of the runway which would be required for the plane to take off will be 206.3 m.

According to Newton's third equation of motion:

v²-u²=2as

s=\(\frac{v^{2}-u^{2} }{2a}\)

s= displacement

v= final velocity

u=initial velocity

a= acceleration

According to the given question here,

initial velocity of the plane while take off , u= 28m/s

Average acceleration = 1.9 ms⁻²

Final velocity v = 0 m/s

On putting the given values and solving we get

s=206.3 m

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The use of a pressure cooker at higher altitudes compensates for the lower boiling point of water, reduces cooking time, retains moisture, and enhances the tenderness of food.

As altitude increases, the atmospheric pressure decreases. At higher altitudes, the boiling point of water decreases, which means that water boils at lower temperatures compared to sea level. This lower boiling point affects the cooking time and the tenderness of certain foods, especially those that require longer cooking times.

The lower boiling point at higher altitudes can significantly increase cooking time. By creating a sealed environment, pressure cookers allow the pressure inside to build up, raising the boiling point of water.

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The answer to the question is:

77.0 dB

When the distance from a point source of sound is doubled, the intensity level decreases by 6 dB. This decrease in intensity level with increasing distance is due to the spreading of sound waves over a larger area. According to the inverse square law, the intensity of sound is inversely proportional to the square of the distance from the source.

In this case, the distance is doubled from 2.00 m to 4.00 m. Since the distance is doubled, the intensity level will decrease by 6 dB. Therefore, we subtract 6 dB from the initial intensity level of 80.0 dB.

80.0 dB - 6 dB = 74.0 dB

So, the intensity level at a distance of 4.00 m from the source will be 74.0 dB.

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Answer:

yes

Explanation:

Answer:Doubling the mass or doubling the speed will have a greater effect on the kinetic energy of the ball. Because doubling the mass would have a greater effect on the kinetic energy of the ball because you are dividing the mass by velocity.

Explanation:

If the intensity of the electric field at point P is -3.5 x 10 N/C. the magnitude of the electric force acting on an electron at point P is: D. 5.6 x 10^-15 N.

The electric force acting on a charged particle in an electric field is given by the formula:

F = qE

where F is the magnitude of the electric force, q is the charge of the particle, and E is the magnitude of the electric field at the location of the particle.

Plugging in the given values, we get:

F = (1.6 × 10^-19 C) × (-3.5 × 10^5 N/C)

F = -5.6 × 10^-14 N

Note that the negative sign indicates that the force is in the opposite direction to the electric field. The magnitude of the force is:

|F| = |-5.6 × 10^-14 N| = 5.6 × 10^-14 N

Therefore, the correct option is d) 5.6 x 10^15 N.

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