If you lived on mercury, which planets would describe retrograde loops?

Answer:

The angle of refraction is the angle made by a refracted ray with perpendicular to the refracting surface.

n = sin(i)/sin(r)

= sin(45 deg)/sin(30 deg)

= sqrt(2)

= 1.41

Answer:

An object with no net forces acting on it which is initially at rest will remain at rest. If it is moving, it will continue to move in a straight line with constant velocity. Forces are "pushes" or "pulls" on the object, and forces, like velocity and acceleration are vector quantities.

Explanation:

Answer:

A national park is one such protected area for the special species of flora and fauna of the region. In Nepal, there are numerous national parks to conserve and protect wildlife and their natural habitat.

If you move the screen only, you will not see any interference pattern on the screen. The interference pattern is created by the diffraction of light through the two slits. When the screen is moved, the distance between the slits and the screen changes, and the interference pattern disappears.

To tell if you are seeing the single slit or the double slit pattern, you can look at the interference pattern on the screen. If you are seeing a pattern of bright and dark fringes on the screen, you are seeing the double slit pattern.

This pattern is characteristic of wave interference and is produced when the light passes through two closely spaced slits. On the other hand, if you do not see any interference pattern on the screen, you are seeing the single slit pattern. This pattern is characteristic of wave diffraction and is produced when the light passes through a single slit.  

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Answer: The ability to do work.

Explanation: Scientists define energy as the ability to do work. There is potential energy (where an object at rest has the capacity to have motion) and kinetic energy (where an object is in motion).

A ball of mass 0.125 kg is dropped from rest from a height of 1.25 m. It rebounds from the floor to reach a height of 0.700 m.   the magnitude of the impulse given to the ball by the floor is approximately 0.6975 kg⋅m/s.

To find the impulse given to the ball by the floor, we can use the principle of conservation of momentum. Since the ball is dropped from rest, its initial momentum is zero.

Given:

Mass of the ball, m = 0.125 kg

Initial height, h_i = 1.25 m

Final height, h_f = 0.700 m

First, we can calculate the initial velocity of the ball using the equation for potential energy:

mgh_i = (1/2)mv^2

0.125 kg * 9.8 m/s^2 * 1.25 m = (1/2) * 0.125 kg * v^2

v = √(2 * 9.8 m/s^2 * 1.25 m) ≈ 3.14 m/s

Next, we can calculate the final velocity of the ball using the equation for potential energy:

mgh_f = (1/2)mv^2

0.125 kg * 9.8 m/s^2 * 0.700 m = (1/2) * 0.125 kg * v^2

v = √(2 * 9.8 m/s^2 * 0.700 m) ≈ 2.44 m/s

The change in velocity, Δv, can be calculated by subtracting the initial velocity from the final velocity:

Δv = v_f - v_i

Δv = 2.44 m/s - (-3.14 m/s)

Δv ≈ 5.58 m/s

Finally, we can calculate the impulse using the equation:

Impulse = Δp = m * Δv

Impulse = 0.125 kg * 5.58 m/s ≈ 0.6975 kg⋅m/s

Therefore, the magnitude of the impulse given to the ball by the floor is approximately 0.6975 kg⋅m/s.

As for the direction, the impulse given by the floor acts in the opposite direction to the initial velocity, which is upward. Therefore, the direction of the impulse would be downward.

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The coefficient of static friction μs have to be to keep the glider from springing back to the left when it stops instantaneously is 0.787 N.    When the air-track glider is moving to the right, the spring is compressed and exerts a force to the left to oppose the motion.

Once the glider comes to a stop, this force will be balanced by the static frictional force acting to the right, preventing the glider from springing back to the left. The coefficient of static friction needed to balance this force can be found using the equation:

F_friction = -kx = μs × F_norm

where F_norm is the normal force acting on the glider, which is equal to its weight mg, and x is the distance that the spring is compressed.

At the instant the glider comes to a stop, its kinetic energy is converted entirely into elastic potential energy stored in the compressed spring. Using the conservation of energy, we can find the distance the spring is compressed:

(1/2)mv² = (1/2)kx²

x = sqrt[(mv²)/k] = sqrt[(0.100 kg)(1.50 m/s)² / 20.0 N/m] = 0.387 m

The static frictional force needed to balance the spring force is therefore:

F_friction = kx = (20.0 N/m)(0.387 m) = 7.74 N

Using the expression for static friction, we can solve for the coefficient of static friction:

μs = F_friction / F_norm = F_friction / mg = 7.74 N / (0.100 kg)(9.81 m/s²) = 0.787

Therefore,  the coefficient of static friction μs have to be to keep the glider from springing back to the left when it stops instantaneously is 0.787 N.

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Answer:

I need points cri

Explanation:

Answer:

Electrons

Source:

https://kidshealth.org/en/kids/electric-shock.html#:~:text=When%20you%20touch%20a%20doorknob,quick%20movement%20of%20these%20electrons.

A light-year is not an astronomical measurement of time but rather a useful measurement of great distances. Most common element in the universe is believed to be Hydrogen.

1. A light-year is a unit of measurement used in astronomy to describe vast distances. It is the distance that light travels in one year in the vacuum of space. Light travels at a speed of about 299,792 kilometers per second, and in one year, it covers a tremendous distance. Therefore, a light-year is a useful measurement for describing the vastness of the cosmos, especially when dealing with astronomical distances.

2. In terms of the most cosmically abundant element, hydrogen takes the lead. Hydrogen is the lightest and simplest element, consisting of a single proton and an electron. It is estimated that hydrogen makes up about 75% of the elemental mass in the universe. This abundance is primarily due to the conditions during the early stages of the universe, where hydrogen was formed in large quantities. While other elements like helium, carbon, and iron also exist in significant amounts, hydrogen dominates in terms of cosmic abundance. Its prevalence plays a crucial role in the formation and evolution of stars, galaxies, and other celestial objects.

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To drag the box from point A to B on a horizontal surface using a horizontal force of 10 N, a work of 60 joules (J) must be done over a distance of 6 meters (m).

On a horizontal surface, if a box is dragged from point A to B by a horizontal force of 10 N, the work done can be calculated using the formula:

Work = Force x Distance

In this case, the force applied is 10 N and the distance between points A and B is 6 m.

Plugging these values into the formula, we get:

Work = 10 N x 6 m = 60 Nm

The unit for work is joules (J), so the work done in this scenario is 60 J.

When a force is applied to move an object, work is done.

The work done is calculated by multiplying the force applied by the distance over which the force is exerted.

In this case, the force applied is 10 N and the distance is 6 m.

Multiplying these values gives us the work done, which is 60 J.

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Answer:

Explanation:

it's B)  or the question right above the one you've marked.   The planets do form a plane almost exactly :0   but not a sphere.  

An frictionless hemispherical bowl is being traversed by a particle P. When time t = 0, it moves past point A. The horizontal component of its velocity are v at this precise moment. 

What makes speed and velocity different from one another?

Most people mix the terms velocity and velocity in regular speech. These are different concepts that don't share the same significance in physics. Speed has no direction, which is one significant distinction. Speed is therefore a scalar.

Is the term "velocity" a vector term?

In essence, velocity is a vector quantity. It is the speed at which distance changes. It is the displacement change rate. A moving item can never move at a negative speed. A moving item can have zero velocity. The main determinant of an object's quickness is its speed.

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Answer:

Its Answer is 10 s.

Explanation:

As acceleration is defined as time rate of change of velocity. So,

a =  \(( vf - vi )\) ÷ t

2 = (20 - 0 ) ÷ t

2 =  20 ÷  t

t = 20 ÷ 2

t  = 10 s

We have put initial velocity as zero because  body is starting from rest.

Hope it helps.

Answer: HP = Horse Power.

Explanation: it is the unit given to tell the motor's particular power and 1hp = 746 watts.

The Rayleigh length and Rayleigh range \(Z_{R}\) are calculated: Here is the light's λ wavelength, and n is really the refraction index. This same width w of the beam is 1.414 larger at a distance from the waist equitable.

To the Rayleigh range \(Z_{R}\) that it is at the focus in W = \(W_{0}\) which, this same beam waist. A laser beam's Rayleigh length (and otherwise Rayleigh range) is the distance out from the beam waist (within the propagation path) where the wave radius is elevated by the squared of 2.

This means that the toggle area of a circular beam is doubled at this point. The Rayleigh beam concept takes into account rotational inertia effects that the Euler-Bernoulli beam theory does not.

As a result, the model is applied to a greater range of regimes. Waves in well before Rayleigh beams on elastomer fundaments are given special consideration.

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La energía no se crea ni se destruye solo se transforma

Explanation:

espero y te ayude

The horizontal distance (d_forearm) between the elbow and the point where the weight of the forearm acts is known as the center of mass of the forearm.

The center of mass represents the average position of the weight distribution of an object. In the case of the forearm, this point is important in biomechanics as it helps determine the force exerted by the muscles and the stability of the arm during various movements. To find the center of mass, one can use various techniques including mathematical calculations, experimental measurements, and observation of the anatomy.

Generally, the center of mass for the human forearm is located approximately at the midpoint between the elbow and the wrist, making it roughly 50% of the total length of the forearm. However, this location may vary among individuals due to differences in body proportions, muscle mass, and bone density. In summary, the horizontal distance (d_forearm) between the elbow and the point where the weight of the forearm acts is the center of mass, typically located around the midpoint of the forearm, this point plays a significant role in the biomechanics and stability of the arm during various movements.

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(a) Yes, our velocity changes because the direction is changing. (b) No, we do not accelerate.

(a) Velocity is a vector quantity that includes both magnitude (speed) and direction. When we round a curve and drive east, the direction of our motion changes.

Therefore, even if our speed remains constant, the velocity vector changes because it now points in the eastward direction instead of the previous direction.

(b) When the magnitude of the direction of the velocity is changed, we say that acceleration has occurred. In this scenario, although the direction of your velocity changes, your speed remains constant.

Since the rate at which velocity changes determines acceleration, there cannot be acceleration without a change in velocity.

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Explanation:

t=2s

u=10

v=5

a=?

v=u+at

5=10+2a

2a=-5

a=-2.5

The factor that will directly affect the magnetic force produced by an electromagnetic is (option A) Number of turns in the wire, amount of current.

When a current goes through a wire, it creates a magnetic field around that wire. The strength of the magnetic field is determined by the amount of current that flows through the wire and the number of turns in the wire.

The more turns  in the wire and  how high the current  will determine how strong the magnetic field produce by the Electromagnets will be.

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The focal length of the converging lens is approximately 41 cm (Option F).

To find the focal length of the lens in this problem, we can use the thin lens equation:
1/f = 1/do + 1/di
where f is the focal length of the lens, do is the object distance (25 cm), and di is the image distance (-64 cm, since the image is on the opposite side of the lens from the object).
Plugging in the given values, we get:
1/f = 1/25 + 1/-64
Simplifying, we get:
1/f = (64-25)/25*(-64)
1/f = 39/-1600
Multiplying both sides by -1600, we get:
f = -1600/39
f ≈ -41 cm
However, since the focal length is a physical quantity, it cannot be negative. We therefore take the absolute value of our answer to get:
f ≈ 41 cm
Therefore, the focal length of the converging lens is approximately 41 cm.

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Answer:

800km/s

Explanation:

Initial momentum = final momentum

the total momentum is zero, Before the release of the asteroid , but Superman and the asteroid are not moving.

So, according to the Conservation of momentum the total momentum when the astronaut is been thrown will equals to zero . Then we can say

Initial momentum = final momentum

Because the momentum of the Superman immediately the asteroid is been thrown is equal to the momentum of the asteroid

Momentum =(mass ×velocity)

the mass of the asteroid i= 1000M

Given velocity = 800 m/s,

momentum =(1000M)(800 m/s)

= 800,000M m/s.

to get the answer, we need to divide by Superman's mass, M, which gives his recoil velocity of 800,000 m/s.

But we're told to convert to km/ s

We know that 1m/s=0.001km/s

=(800,000M m/s)× (0.001km/s)

=800km/s

Therefore, his recoil speed (in km/s) is 800km/s

From the given options let's select the example which shows a conceptual model.

A conceptual model can be said to be a model which shows an abstract representation of any concept which can be visualized or imagined than other models.

It is a model which the designers want users to understand.

From the list, the best option which is an example of a conceptual model is a mental image of gas molecules as tiny balls.

Let's say, for example, you imagine or have a mental picture of gas molecules using your imagination, it helps to understand how a vacuum system works and you can easily solve the problem if something goes wrong.

Therefore, the example of a conceptual model is:

A mental image of gas molecules as tiny balls.

• ANSWER:

A. mental image of gas molecules as tiny balls

Answer:

Cells come from other pre-existing cells

Explanation:

Answer:

Cell discovery and cell theory

Matthias Schleiden and Theodor Schwann conclude that all living organisms are made of cells, and that cells can be produced from other cells. Rudolf Virchow confirms that all cells must come from pre-existing cells.

Explanation:

i looked it up

Answer:

C

Explanation:

Got it right on the test :)

Please mark brainliest!! <3

The force on the proton is 17.4 N.

Now we know that the proton is positively charged and that the force on the charge as it moved through the magnetic field could be given by the relation; F = qvB

Where;

F = force

q = charge

v = velocity

B = magnetic field

Having said this, we can see that;

q = 1.601019 As or C

v =  2.4105 m/s

T = 4.5 T

F =  1.601019 As * 2.4105 m/s * 4.5 T

F = 17.4 N

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If the student replaced the water in the calorimetry device with an ice bath at 0°C, the experimental results would differ in several ways:

Temperature Change: Instead of measuring the change in temperature of the water, the student would measure the change in temperature of the ice bath. As heat is transferred from the surroundings to the ice bath, the ice will melt and the temperature of the ice bath will increase until it reaches 0°C. The temperature change observed in the experiment would be different from that of the water bath.
Heat Capacity: The heat capacity of the ice bath would be different from that of the water bath. Ice has a lower heat capacity than water, meaning it requires less heat energy to raise its temperature. This would affect the amount of heat absorbed or released during the reaction and lead to different experimental results.
Enthalpy Change: The enthalpy change calculated from the experiment would be specific to the reaction being studied. However, the enthalpy change determined using an ice bath would be based on the heat exchange with the ice bath, rather than the water bath. The enthalpy change values would differ due to the different heat capacities and temperature changes involved.
Overall, using an ice bath instead of a water bath would result in different temperature changes, heat capacities, and enthalpy change values in the experimental results.

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Answer:

50 km/h

Explanation:

\((40 + 60) / 2\)

-> \(50\) (km/h)

Answer: less than 9.8 m/s^2 but greater then zero

Explanation:

Gravitation law

The gravitational acceleration experienced by the satellite is 9.26m/s².

Therefore, Option D) less than 9.8 m/s2 but greater than zero is the correct answer.

Given the data in the question;

To keep the satellite in orbit, a centripetal force is required, this is provided by the gravitational force.

Hence, \(F_{centripetal } = F_{gravity}\)

That is; \(\frac{mv^2}{r} = mg\)

divide both sides by "m"

\(\frac{v^2}{r} = g\)

Here, v is the velocity, g is the gravitational acceleration experienced by the satellite, r is the distance of the satellite from the center of the EARTH.

Diameter of the Earth; \(D_{Earth} = 12742 km = 12742000m\)

Radius of the Earth; \(R_{Earth} = \frac{12742000m}{2} = 6371000m\)

So,

Distance of the satellite from the center of the EARTH; \(r = R_{Earth} + h = 6371000m + 200000m = 6571000m\)

Now we substitute our values into the equation

\(\frac{v^2}{r} = g\)

\(g = \frac{(7800m/s)^2}{6571000m} \\\\g = \frac{60840000m^2/s^2}{6571000m}\\\\g = 9.26m/s^2\)

The gravitational acceleration experienced by the satellite is 9.26m/s².

Therefore, Option D) less than 9.8 m/s2 but greater than zero is the correct answer.

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Legend has it that a young Isaac Newton was sitting under an apple tree when he was bonked on the head by a falling piece of fruit, a 17th-century “aha moment” that prompted him to suddenly come up with his law of gravity.