Kinetic energy is the energy of an object in motion. Potential energy is the energy associated with an object
that can do work even if it isn’t doing so yet.
True
False

Answer:

Yellow

Explanation:

So while red, green and blue light shine upon the shirt, only red and green light will reflect from it. Red and green light striking your eye always gives the appearance of yellow; for this reason, the shirt will appear yellow.

Answer:

In which direction does the current in circuit A flow?

counterclockwise

Explanation:

The current flowing through the circuit A is \(I = \frac{e}{r_1 + r_2}\).

"Your question is not complete, it seems to be missing the following information",

find the the current flowing through the resistors in circuit A;

The given parameters;

The equivalent resistance of the circuit A in series is calculated as follows;

\(R_e = r_1 + r_2\)

The emf of the battery connected to circuit A

emf = e

The current flowing through the circuit A is calculated as follows;

\(V= IR\\\\I = \frac{V}{R} \\\\I = \frac{e}{R_e} \\\\I = \frac{e}{r_1 + r_2}\)

Thus, the current flowing through the circuit A is \(I = \frac{e}{r_1 + r_2}\).

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Answer: We will survive

Explanation: Caring for the earth is something that we need to do to live or survive on earth because if we don't we may not survive.

Hope this helps! :)

Hi!Caring of earth is necessary because to reduce the misuse of air, water, land, forest, minerals which affects the earth and results in problems like global warming, climatic changes, scarcity of food etc.

Answer:

B

Explanation:

if a positively charged rod is brought near the knob of a neutral electroscope, it will attract some electrons up from the leaves onto the knob. That process causes both of the leaves to be positively charged (excess protons), and the leaves will diverge.

Answer:

27.5 ohms

Explanation:

V = IR

V / I = R

220/8 = 27.5 Ohms

Answer:

the mathematical models, Newton's second law, improve the response of our designs and allow us to modify them to be more resistant.

Explanation:

When an object is designed it is done based on some models or guides, specifically Newton's second law is given in the form

            ∑ F = m a

We can make a design and test with forces applied in several different places and with different intensity, to find weak points in the design, this is done a lot today in the construction of tall buildings, in the design of airplanes; The great advantage of this is that it allows you to see problems without significant cost of money and human lives.

There are also designs that can be modified to improve the response of our system to different external stimuli, this is widely used in the design of bridges, to see the response of the structure before load changes and different climatic conditions.

In summary, the mathematical models, Newton's second law, improve the response of our designs and allow us to modify them to be more resistant.

Person-1

\(\\ \sf\longmapsto Acceleration=\dfrac{v-u}{t}\)

\(\\ \sf\longmapsto Acceleration=\dfrac{10-0}{10}\)

\(\\ \sf\longmapsto Acceleration=\dfrac{10}{10}\)

\(\\ \sf\longmapsto Acceleration=1m/s^2\)

Person-2

\(\\ \sf\longmapsto Acceleration=\dfrac{0.25-0}{2}\)

\(\\ \sf\longmapsto Acceleration=\dfrac{0.25}{2}\)

\(\\ \sf\longmapsto Acceleration=0.125m/s^2\)

Person-1 is accelerating faster.

Answer:

8n

Explanation:

To adjust the pendulum so that it swings back and forth once every 2 seconds, you should make the pendulum slightly longer.

The time period of a pendulum is directly proportional to the length of the pendulum. This means that if you increase the length of the pendulum, the time it takes for it to complete one swing will also increase. Therefore, to increase the time period of the pendulum from 1.9 seconds to 2 seconds, you need to increase its length slightly. This will cause the pendulum to swing back and forth once every 2 seconds, as desired.

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Answer:

Explanation:

m = mass of the body

g = acceleration of gravity

h = height above surface of earth

m and g are constants while h can vary as the body is moving.  Unless h is extremely large, you can take g to be a constant 9.81 m/s2

Answer:

v = 51.60 m/s

Explanation:

To calculate the velocity of the Earth around the sun you use the following formula, which comes from the universal gravitational Law:

\(v=\sqrt{\frac{GM_E}{r}}\)

M_E: Earth's mass = 5.97*10^24 kg

r: distance between the Sun and the Earth = 149 600 000 km =m

G: Cavendish's constant = 6.674×10−11 m3⋅kg−1⋅s−2

You replace the values of G, M_E and r in the equation for v:

\(v=\sqrt{\frac{(6.674*10^{-11}m^3/kgs^2)(5.97*10^{24} kg)}{ 1.496*10^{11}m }}\\\\v=51.60\frac{m}{s}\)

hence, the velocity of traslation of the Earth is 51.60 m/s

Answer:

the positive and negative signs are used to show different directions of acceleration and velocity

Explanation:

for example, if a car was moving forward, you would usually express it with a positive sign. If the car started moving backwards, you would show that backwards motion with a negative sign.

The "Load Capacity" of a jack refers to the greatest weight it can support. Maximum weight of cargo that has been authorised by the country where the vehicle was registered.

We can determine the necessary minimum capacity for a trailer jack by analysing the concentration of loads in a typical trailer.

Thus, the "Load Capacity" of a jack refers to the greatest weight it can support.

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Answer:

Yes

Explanation:

The wind net force acting on the sail is doing work.   (The 'net' force takes into account the force of friction between the boat hull and the water)

Answer:

Choice A & Choice B

The proteins are encoded by genes with different nucleotide sequences, they likely have different functions. The correct options are A and B.

Genes with various nucleotide sequences encode the proteins. Protein 1 and Protein 2 have distinct amino acid sequences, indicating that they are encoded by genes with different nucleotide sequences.

Because the amino acid sequences of Protein 1 and Protein 2 differ so greatly, it is likely that they have separate activities.

The assumption that proteins must be found in diverse parts of the body is not always correct. Although proteins with distinct activities may be found in different parts of the body, variations in their amino acid sequences cannot be used to identify this.

Thus, the correct options are A and B.

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Answer:

Sorry I'm wrong The person above is correct.

I tried.

Answer:

The net force on the brick is 0N and the brick remains at rest.

Explanation:

Net force = 5N - 5N

= 0N

(a) The support of K can be given by {0, 1, 2, 3, 4}.

(b) The set of events in which the aircraft is functioning can be given as follows: {K ≥ 1}, which means the aircraft is functioning if and only if at least one of its engines is functioning properly.

(c) Let's assume that the probability of each engine functioning properly is given by p. So, the probability of any particular engine malfunctioning or not functioning properly is (1 - p).

Since the aircraft is functioning if and only if at least one of its engines is functioning properly, the probability of system reliability can be calculated using the following formula:

P(K ≥ 1) = 1 - P(K = 0)

Since each engine functions independently of each other, the probability of each engine malfunctioning can be multiplied together. Thus, we have:

P(K = 0) = (1 - p)^4

Then,

P(K ≥ 1) = 1 - P(K = 0)

= 1 - (1 - p)^4

Therefore, the probability of the aircraft functioning, which represents system reliability, is given by 1 - (1 - p)^4.

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The formula for the time period (T) of the pendulum is:

T = 2π * √(L/g)

Where L is the length of the pendulum and g is the acceleration due to gravity.

Substituting the given values into the above formula:

T = 2π * √(1.633/9.8)T

≈ 1.585 seconds

Therefore, it takes approximately 1.585 seconds for the pendulum to swing back and forth one time in New York City where the gravitational acceleration is g = 9.8 meters per second squared.

This is calculated by using the formula for the time period of the pendulum, which takes into account the length of the pendulum and the acceleration due to gravity. The length of the pendulum in this case is given as Y = 1.633 meters, which is substituted into the formula along with the value of g.

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Answer:

Explanation:

The properties of magnets are used to make electricity. Moving magnetic fields pull and push electrons. ... Moving a magnet around a coil of wire, or moving a coil of wire around a magnet, pushes the electrons in the wire and creates an electrical current.

The charge state of the electrophorus after the procedure will be positively charged.

The electrophorus is a simple device used to generate static electricity. It consists of a metal plate (called the "base") and an insulating plate (usually made of plastic) that is placed on top of the base.

When the electrophorus is momentarily connected to ground, any excess charge on the metal plate (i.e., the positive charge) will be neutralized, leaving the metal plate with no net charge.

After the electrophorus is disconnected from ground and lifted off the plastic sheet, the metal plate will become positively charged again by induction. This is because the negative charge on the insulating plate repels electrons in the metal plate and attracts positive charges, leaving the metal plate with a net positive charge.

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Answer:

A

Explanation:

Light has both wave and particle characteristics. It behaves as wave in examples such as Reflection, refraction, diffraction, interference. It behaves as a particle in photoelectric effect, compton's effect etc. Light is an example of wave-particle duality.

Light demonstrate both particle and wave characteristics. It can be understood by photo electric effect .

Light behaves like a particle in some phenomenon , for example photoelectric effect and like wave in some phenomenon , for example reflection and refraction , in this wave light has dual nature.

Emission of photo electrons due to incidence of light on a surface, is called photo electric effect. For it the energy of the incident light should be greater than the work function of the material on which light incidents.

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Destructive interference occurs when two waves with opposite amplitudes meet and cancel each other out, resulting in a wave with zero amplitude. This statement is true.

In this scenario, a pulse with an amplitude of +5 units meets a pulse with an amplitude of -5 units. When these two pulses interfere, they will create destructive interference, causing the resulting wave to have zero amplitude.
Therefore, the statement "destructive interference occurs when a pulse with an amplitude of +5 units interferes with a pulse with an amplitude of -5 units" is true.
Destructive interference is a phenomenon that occurs when two waves meet and their amplitudes are opposite. In this case, we have two pulses, one with an amplitude of +5 units and another with an amplitude of -5 units. When these pulses meet, they will interfere with each other.
The interference of two waves can be either constructive or destructive. Constructive interference occurs when two waves meet and their amplitudes are in the same direction, resulting in a wave with an amplitude that is greater than either of the individual waves.

In contrast, destructive interference occurs when two waves meet and their amplitudes are in opposite directions, resulting in a wave with an amplitude of zero.
In the scenario presented in the question, the pulse with an amplitude of +5 units meets the pulse with an amplitude of -5 units. These two pulses have opposite amplitudes, which means they will interfere destructively. This destructive interference will result in a wave with zero amplitude.
he statement "destructive interference occurs when a pulse with an amplitude of +5 units interferes with a pulse with an amplitude of -5 units" is true.

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By contrasting a substance's melting point with the melting points of other known chemicals, melting point determination can be used to identify a substance.

The temperature at which a substance transitions from a solid to a liquid form is known as the melting point of that substance. A pure substance has a sharp melting point and melts at a specific temperature, whereas an impure substance has a lower melting point and melts over a wider temperature range.

Precautions to be taken while using a melting point apparatus are -

1. To find the melting point of a sample, use a dry, powdered sample.

2. Maintain a level distance between the thermometer and the lower end of the capillary tube.

3. There shouldn't be any significant air spaces between the solid particles and the powder during packing.

4. To keep a constant temperature, the bath should be gradually heated and stirred often.

5. Neither the bottom of the beaker nor the sides of the thermometer's bulb or the capillary attached to it should contact.

6. When connecting the capillary tube to the thermometer, avoid using rubber bands.

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The cylinder will be moving at a velocity of 2.52 m/s after it has rolled 2.2 m down the inclined plane. This calculation can be done using the conservation of energy principle, which states that the initial potential energy of the cylinder is equal to the final kinetic energy plus the final rotational kinetic energy.

To explain further, when the cylinder is released from rest, it has a certain amount of gravitational potential energy due to its height above the ground. As it rolls down the inclined plane, this potential energy is converted into both translational kinetic energy (motion of the center of mass) and rotational kinetic energy (rotation around the center of mass). By the time the cylinder has rolled 2.2 m down the plane, it has lost some potential energy, which has been converted into kinetic energy.

Using the conservation of energy equation and the known values of the cylinder's mass, the angle of the inclined plane, and the distance it has rolled, we can calculate the final velocity of the cylinder as 2.52 m/s.

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Answer:

The resultant momentum is 12.97 kg.m/s. Choice: c

Explanation:

Momentum

The momentum is a vector that measures the quantity of motion that an object has. It's also known by the term "mass in motion".

As a vector, it can be expressed by its rectangular components:

\(\vec p = p_x\mathbf{i}+p_y\mathbf{j}\)

The magnitude of the momentum is:

\(\mid \mid \vec p \mid \mid =\sqrt{p_x^2+p_y^2}\)

The object described has an x-component of:

px=8.5 Kg.m/s

And a y-component of:

py=9.8 Kg.m/s

Thus, the magnitude of the momentum is:

\(\mid \mid \vec p \mid \mid =\sqrt{8.5^2+9.8^2}\)

\(\mid \mid \vec p \mid \mid =\sqrt{72.25+96.04}\)

\(\mid \mid \vec p \mid \mid =\sqrt{168.29}\)

\(\mid \mid \vec p \mid \mid =12.97\)

The resultant momentum is 12.97 kg.m/s. Choice: c

The true azimuth of the AB alignment is 91º 52' (east of north), the magnetic azimuth is 100º 22' (east of north), and the grid azimuth is 108º 52' (east of north).

To find the true azimuth, magnetic azimuth, and grid azimuth of the AB alignment, we need to consider the magnetic declination. The magnetic declination indicates the angle between true north and magnetic north at a specific location. In this case, the magnetic declination is 8º 30' E, which means that the magnetic north is 8º 30' east of the true north.

To calculate the true azimuth, we subtract the magnetic declination from the grid azimuth. The grid azimuth is given as 100º 22', so subtracting the magnetic declination of 8º 30' E gives us a true azimuth of 91º 52' (east of north).

The magnetic azimuth remains the same as the grid azimuth, which is 100º 22' (east of north).

The grid azimuth is calculated by adding the magnetic declination to the true azimuth. Since the magnetic declination is east, we add it to the true azimuth. Adding 8º 30' E to the true azimuth of 91º 52' gives us a grid azimuth of 108º 52' (east of north).

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Answer:

3.3m/s

Explanation:

speed =Distance /Time

x=400m

t=2mintues=2min*60sec/min=120seconds

S=400m/120s

S=3.33333...

therefore speed = 3.3m/s

The speed of an object is the distance divided by the time of travel. The speed of the person running 400 meters in 2 minutes is 3.3 m/s.

Speed is a physical quantity used  to measure the distance covered per unit time. Speed is a scalar quantity thus, having magnitude only. The rate of speed is called velocity. Velocity is a vector quantity.

Speed in physics is the ratio of the distance covered per unit time. Thus, speed can have the units m/s, Km/hr, ft/s miles/s etc. As the time of the travel increases, speed is said to be decreasing.

The distance covered  = 400 meters.

time = 2 minutes = 2 × 60 s = 120 s

Speed = distance / time

           = 400 m/ 120 s

           = 3.3 m/s.

Therefore, the speed is 3.3 m/s.

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The energy in the atmospheres of most of the jovian planets comes from various sources, but the predominant source of energy is the sun. The sun provides heat and light to the outermost layers of the planets' atmospheres

The interiors of the jovian planets also contribute significantly to their overall energy budgets. These planets are believed to have hot and dense cores, which produce heat through the process of radioactive decay. This heat is transported upwards through the planet's layers, eventually reaching the surface and contributing to the overall temperature of the planet.

Despite the significant contribution of their interiors to their overall energy budgets, it is generally accepted that the energy in the atmospheres of most of the jovian planets comes almost entirely from the sun. This is because the outermost layers of these planets are largely composed of gas, which is not a good conductor of heat.

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Answer:

\(2\sqrt{6}\)  \(\frac{mi}{s}\)

Explanation:

Assuming there is no waste of energy:

\(K_{1} = K_{2}\\\frac{1}{2}m_{1}v_{1_{1}}^{2} + \frac{1}{2}m_{2}v_{2_{1}}^2 = \frac{1}{2}m_{1}v_{1_{2}}^{2} + \frac{1}{2}m_{2}v_{2_{2}}^2\\\\=> m_{1}v_{1_{1}}^{2} + m_{2}v_{2_{1}}^2 = m_{1}v_{1_{2}}^{2} + m_{2}v_{2_{2}}^2\\\\m_{1} = 2 kg, m_{2} = 1 kg, v_{1_{1}} = 4 \frac{mi}{s} , v_{2_{1}} = 0\\=> 32 = 8 + v_{2_{2}}^{2} => v_{2_{2}} = 2\sqrt{6} \frac{mi}{s}\)