what is a plane mirror? state the characteristics of the image formed by a plane mirror ​

The bug inside the projectile that is orbiting a completely smooth, airless planet is not weightless, but it experiences apparent weightlessness due to the constant acceleration of the projectile towards the planet.

Weightlessness is typically defined as the absence of the sensation of weight due to the absence of a supporting force. In this case, the bug inside the projectile is not in contact with any external force other than the walls of the projectile, which are in turn accelerating towards the planet due to the gravitational force. This acceleration causes the bug and the projectile to move along a curved path that matches the curvature of the planet, giving the sensation of weightlessness. However, the bug does have a non-zero mass and therefore experiences a gravitational force due to the planet, which is counteracted by the normal force exerted by the projectile's walls. Therefore, the bug is not weightless, but rather experiences apparent weightlessness due to the constant acceleration of the projectile towards the planet.

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Ocean thermal energy conversion (OTEC) is a technology that uses the temperature differences between warm surface water and cold deep water in the ocean to generate electricity. The temperature difference can be significant, up to 20 degrees Celsius or more in some places, and this temperature gradient can be harnessed to drive a power-generating turbine.

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Answer: B

Explanation:

The conservation of momentum states that the initial momentum of the system must equal the final momentum of the system. Our system in this case is the two colliding objects and ONLY the two colliding objects. Initially, our system had mass 1 moving towards a stationary mass 2. The stationary mass has a velocity of 0m/s and therefore has no momentum. The initial momentum would then be:

\(p_i=m_1v_1_i+m_2v_2_i\)

\(p_i=m_1v_1_i\)

The final momentum depends on what type of collision occurred. This case is the simplest type of collision, when the objects stick to each other and act as one. Since the objects move together, their velocity must be the exact same. Our final momentum looks like:

\(p_f=m_1v_f+m_2v_f\)

\(p_f=v_f(m_1+m_2)\)

Setting the initial momentum equal to the final momentum:

\(p_i=p_f\)

\(m_1v_1_i=v_f(m_1+m_2)\)

Solving the final velocity:

\(v_f=m_1v_1_i/(m_1+m_2)\)

Which matches answer B

Answer:

you have to post the diagram with your question together cause we are to use the diagram to answer the question. Post the Diagram we are to ANSWER from. i really want to help

Answer:

The velocity of the crossbow as it recoils is 5 m/s. This can be calculated using the conservation of momentum. The momentum of the system before the bow was triggered is 0 (since the bow is stationary). After launching the bolt, the momentum of the system is (0.10 kg * 25 m/s), so in order for the momentum of the system to remain constant, the crossbow must recoil with a momentum of (5.0 kg * -5 m/s).

Answer:

B

Explanation:

An attractive force will occur between the plastic rod and nearby object.

An object is placed near the plastic rod, and an attractive force is detected then the object react when near the glass rod due to presence of attractive force between them. Attraction occurs between two bodies or objects when there is presence of opposite charges on both objects.

So we can conclude that an attractive force will occur between the plastic rod and nearby object.

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:

ultraviolet B

Explanation:

The quantity that will have the same value along their paths is their acceleration option (D).

The rate at which the speed and direction of a moving object alter over time is known as acceleration. When anything begins to move faster or slower, it is said to be accelerating.

If we ignore air resistance, there will only be one force acting on the balls because they are all hurled straight up into the air: the force of gravity.

Where m is the ball's mass, the force of gravity acting on each ball is given by

The acceleration caused by gravity is known as g (9.8 m/s², downhill).

According to Newton's second law,

F=ma,

where F is the net force exerted on the ball:

And after simplifying, we discover that the acceleration of each ball is: and since g is a constant value, we draw the conclusion that each ball's acceleration is the same regardless of mass or initial speed.

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Complete question is "If several balls are thrown straight up with different initial speeds, the quantity that will have the same value along their paths is their(A) initial momentum.(B) maximum height.(C) time of travel.(D) acceleration".

c) Superior and inferior portions.

The body's upper (superior) or lower (inferior) halves are separated by the transverse plane, also known as the axial plane.This plane is where rotational or horizontal movements take place, such as:Rotation: turning the torso or even a limb about its axis of rotation.

Transverse plane: A horizontal slit that divides the specimen's top and bottom.additionally called a cross-sectional plane.The left and right halves of the specimen are divided by a vertical cut made along the specimen's exact center line, or midsagittal plane.

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Answer:

\(a = 0.894\ m/s^2\)

Explanation:

Motion with Constant Acceleration

A body moves with constant acceleration when the speed changes uniformly in time. The equation used to find the final speed vf is

\(v_f=v_o+at\)

Where vo is the initial speed, a is the acceleration, and t is the time.

The cyclist has an initial speed of vo=10 miles/hour and ends up at vf=20 miles/hour in t=5 seconds.

Both speeds are given in miles/hour and we must convert it to m/s:

1 mile/hour = 0.44704 m/s

10 mile/hour = 4.47 m/s

20 mile/hour = 8.94 m/s

The acceleration is calculated by solving for a:

\(\displaystyle a=\frac{v_f-v_o}{t}\)

\(\displaystyle a=\frac{8.94-4.47}{5}\)

\(a = 0.894\ m/s^2\)

Answer: False

Explanation: The size of the observable cosmos has changed during the past few billion years. Since the Big Bang, which is thought to have happened approximately 13.8 billion years ago, the observable universe has been expanding. This indicates that the observable universe has been expanding together with the distance between galaxies. The cosmos has seen phases of acceleration and slowdown in its expansion, however the rate of expansion has not always been constant. The observable universe is therefore bigger than it was a few billion years ago.

Answer:

v=wavelength x f = 2 x 3 = 6 m/s

Explanation:

The speed of a wave is the product of its frequency and wavelength. The speed of the periodic wave with the frequency of 3 Hz and wavelength of 2 m is 6 m/s.

Frequency of a wave is the number of wave cycles per unit time. It is the inverse of the time period of the wave. Frequency is inversely proportional to the wavelength  of the wave.

The relation between speed, frequency and wavelength of a wave is given by the expression as written below:

c =νλ

where, c is the speed, ν be the frequency and λ be the wavelength.

Given that ν = 3 Hz or 3 s⁻¹

and λ = 2 m

then speed c = 2 m × 3 Hz = 6 m/s

Therefore, the speed of the periodic wave is 6 m/s.

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The paper should be placed at the focal point of the lens to obtain a sharp image.

The focal point of a lens is the point where parallel rays of light converge or diverge after passing through the lens. Placing the paper at this point ensures that the incoming light rays from the object on the other side of the lens converge precisely onto the paper, resulting in a focused and sharp image.

The distance between the lens and the paper should be equal to the focal length of the lens. The unit of focal length is typically measured in millimeters (mm) or meters (m), depending on the scale of the lens. Therefore, the paper should be positioned at the focal point of the lens to achieve a sharp image, with the distance measured in units of length such as millimeters or meters.

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Answer:

C

Explanation:

During investigations a scientist needs to observe, investigate, collect data and put together the information they collect.

(a) As σ is increased, The minimum  angle will be "19.2°".

(b) The acceleration will be "0.91 m/s²"once the box has began to move.

(c) The speed will be "3 m/s" as the box slid a distance 4.7 m along the loading map.

According to the question,

Mass = 25.0 kg

Kinetic friction = 0.25

Coefficient of static friction = 0.35

(a) We know,

⇒ static friction = mg sine

⇒ mg cosine * u = mg sine

then,

tan A = u = 0.35

a = 19.2

Therefore, as α is increased,  the minimum angle at which the box starts to slip is 19.2°.

(b) We know that:

Kinetic friction = mgCos19.2 * 0.25

                        = 2.31m

and,

Net force downwards = mgSin19.2 -  mgCos19.2* 0.25

By substituting the values, we get

                                        = m(3.22-2.31)

                                        = 0.91m/s²

Therefore, As this angle, the acceleration once the box has begun to move at 0.91 m/s².

(c) since the box is sliding at a distance of 4.7 meter:

Thus,

The speed will be:

→ \(v^{2} - u^{2} + 2as\)

\(0 + 2* 0.91* 5\)

= 9.21

\(v = 3m/s\)

Therefore, at this angle, at 3m/s will the box be moving after it has slid a distance 4.7m along the loading ramp

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Answer:

P = 0

Explanation:

Momentum is defined as the quentity of motion contained in a body. Mathematically, it can be defined as the product of mass and velocity. So, in order to determine the Volkswagen Beetle, at rest, we can use the simple formula, as follows:

\(P = mv\)

where,

P = Momentum of Volkswagen Beetle = ?

m = Mass of Volkswagen Beetle = 750 kg

v = Velocity of Volkswagen Beetle = 0 m/s (since, it is at rest)

Therefore,

\(P=(750)(0)\)

P = 0

The device that determines a cable break or short exists is Time domain reflectometer.

What is a Time domain reflectometer?

The location of defects in transmission lines and coaxial cables can be found using a Time Domain Reflectometer (TDR). The TDR scans the transmission line with a low-voltage pulsed signal to look for any impedance-related reflections. No reflections will occur if there is no impedance mismatch over the entire length of the line, but if the transmission line is interrupted at a specific location, portion of the pulsed signal will be reflected back to the TDR. The TDR can pinpoint the precise position of a problem and determine its type, such as an open circuit, short circuit, or impedance mismatch, by monitoring the timing and propagation velocity of the received pulse.

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In terms of the thermal inversion phenomena, the temperature of air is decreasing within a limited layer in the lower atmosphere, and pollution is trapped near the ground.

Thermal inversion refers to a weather condition where the temperature of air usually decreases with altitude but shows a reversal, causing a layer of warm air to be trapped above a layer of cooler air near the ground.

This inversion layer acts as a lid, preventing the vertical mixing of air and trapping pollutants close to the surface. The cooler air beneath the inversion layer cannot rise and disperse the pollutants effectively, leading to poor air quality and potential health hazards.

This phenomenon commonly occurs during stable atmospheric conditions, such as clear nights with light winds or in urban areas surrounded by mountains, where cold air drains into valleys and forms a temperature inversion.

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The direction of the magnetic field created directly above the wire carrying current in the northerly direction would be circular, with the magnetic field lines forming concentric circles around the wire.

The direction of the magnetic field can be determined by applying the right-hand rule, which states that if you point your thumb in the direction of the current flow (in this case, towards the north), then the direction of the magnetic field will be perpendicular to both the direction of the current and the direction of your thumb.

Therefore, the magnetic field would be directed towards the east if you are standing directly above the wire looking northwards. This is because the magnetic field lines will be perpendicular to the direction of the current and the direction of the thumb, and will therefore form circles around the wire in a clockwise direction.

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The direction of this current's magnetic force on an electron that is moving perpendicular to the page and outward from it on the left side of the wire is downward.

What is Magnetic force?

The force exerted by a magnetic field on a moving charged particle is known as a magnetic force. It is described by the formula F = q(v x B), where F is the magnetic force, q is the particle's charge, v is the particle's velocity, and B is the magnetic field.

The right-hand rule states that when a wire-carrying current is held in the right hand with the thumb pointing in the direction of the current, the fingers will curl in the direction of the magnetic field lines created by the current.

The magnetic field lines will create clockwise circles around the wire because, in this instance, the current flows from the top of the page downward.

Now imagine an electron on the left side of the wire traveling perpendicular to the page. The electron will experience a magnetic force since it travels in a direction perpendicular to both the magnetic field and the current.

We can use the left-hand rule for a negative charge to determine the direction of this force. If the left hand is held with the fingers pointing toward the magnetic field and the thumb pointing toward the electron's velocity, the palm will face the order of the force on the electron.

The thumb points to the left because the electron leaves to the left. The fingers curl because the magnetic field lines go clockwise around the wire. Therefore, the magnetic force acting on the electron is directed downward because the palm is facing downward.

Therefore, the magnetic pull exerted by this current on an electron traveling outward and perpendicular to the page on the wire's left side is directed downward.

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If the isotope has a half-life of 1150 years, this means that every 1150 years the amount of the isotope is halved. After one half-life, the amount is reduced to 1/2, after two half-lives it is reduced to 1/4, after three half-lives it is reduced to 1/8, and so on.

To determine how many years are required for the isotope to decay to 25% of its original amount, we need to determine how many half-lives it takes to get from 100% to 25%.

25% is the same as 1/4, so we need to determine how many times we need to halve the original amount to get to 1/4.

1/4 = (1/2)^n, where n is the number of half-lives

Solving for n:

n = log(1/4) / log(1/2)

n = 2

This means that it takes two half-lives for the isotope to decay to 25% of its original amount.

Since the half-life is approximately 1150 years, the time required for two half-lives is approximately:

2 x 1150 years = 2300 years

Therefore, it would take approximately 2300 years for a given amount of this isotope to decay to 25% of that amount.

Answer: Down below is the answer in complete sentences!

Explanation:

PART A:

Gravity and Acceleration are two additional forces acting upon the sled.

PART B:

Gravity will affect the sled by pulling it down, since the slope of the hill is negative.

Acceleration will affect the sled by gradually increasing it's speed, since the slope is downwards, which in addition to the initial force exerted plus gravity increases the speed, thus the sled accelerates.

Answer:

Explanation:

The work done by an object can be found by using the formula

From the question

force = 400 N

distance = 50 m

We have

work done = 400 × 50

We have the final answer as

Hope this helps you

Answer:

The Ability to do work

Explanation:

energy is needed to do work because without energy no work can be done due to the fact that there is no energy

When passing an array by value to a "reference" procedure, the original array may be changed by the procedure.

In some programming languages, like C++, when an array is passed by value to a procedure that accepts a reference to an array, the procedure can modify the elements of the original array. This is because passing by reference allows the procedure to directly access and modify the memory locations of the original array.

On the other hand, when an array is passed by value to a "value" procedure, the procedure receives a copy of the array, and any modifications made within the procedure do not affect the original array.

Therefore, when passing an array by value to a reference procedure, it is important to be aware that the procedure has the potential to change the original array, while passing by value to a value procedure ensures that the original array remains unchanged.

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Answer:

The age trend of the volcanoes is thought to be due to the way in which the islands are built on the moving sea floor of the North Pacific Ocean: the Pacific Ocean is mostly floored by a single tectonic plate (known as the "Pacific Plate") that is moving over the layer in the Earth known as the Asthenosphere

Explanation:

Answer:

Oh god

i have nooooo idea

The correct answer is: object A must have a higher average internal kinetic energy than object B to have a higher absolute temperature.

To understand which of the given options would make object A have a higher absolute temperature than object B, we first need to understand what temperature is and how it is related to the properties of an object.

Temperature is a measure of the average internal kinetic energy of the particles in an object. The greater the average internal kinetic energy, the higher the temperature. So, to have a higher temperature than object B, object A must have a higher average internal kinetic energy.

Now let's consider the given options:

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