Whats the answer for this?

Given data

*The given energy is k = 795 J

*The speed of the object is v = 3.5 m/s

The formula for the kinetic energy of the object is given as

*Here m is the mass of the object

Substitute the known values in the above expression as

Hence, the mass of the object is m = 129.79 kg

Answer:

microwaves

Explanation:

Among the following, the wave which is not an example of the electromagnetic wave is water wave. Thus, the correct option is B. Explanation: Electromagnetic waves are produced as a result of the vibrations between the electric and magnetic fields. Examples of electromagnetic waves are X-ray, lightwave, radio wave, microwave, etc.

Answer:

Gravitational potential energy and Elastic potential energy

Explanation:

The two types of potential energy the springs described in the question have are Gravitational potential energy and Elastic potential energy.

Firstly, it must be noted that potential energy is the energy stored/present in a stationary (non-moving) object (or object at rest).

Gravitational potential energy is the potential energy as a result of the vertical position of an object due to force of gravity acting to pull it down. The gravitational potential energy is as a result of the springs been attached to the ceiling which causes the force of gravity to want to pull it down. This gravitational force is further increased when the swing is attached causing the weight of swing to act in the direction of the force of gravity.

Elastic potential energy is the potential energy stored in an elastic object or energy stored in an object that can be stretched or compressed. This is the energy that would always be found in a spring, so when the springs have been attached to the ceiling and the swing has been fastened to them, there elastic potential energy would reduce as a result of the kinetic energy that must have been used to stretch the springs.

The acceleration of the car during the 10th to 17th second interval is calculated using the equation a=(v2-v1)/t, where a is the acceleration, v1 is the initial velocity, v2 is the final velocity, and t is the time interval.the acceleration of the car during this interval is  6.14km/h2/s.the instantaneous acceleration is  6.14km/h2/s.

In this case, v1=29km/h, v2=47km/h, and t=7 seconds. Thus, the acceleration of the car during this interval is a = (47-29)/7 = 6.14km/h2/s.

The instantaneous acceleration of the car at both the initial and final velocities can be calculated using the equation a=dv/dt, where a is the acceleration, dv is the change in velocity, and dt is the change in time.

For the initial velocity of 29km/h, the instantaneous acceleration is a = dv/dt = 0km/h/s. For the final velocity of 47km/h, the instantaneous acceleration is a = dv/dt = 6.14km/h2/s.

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Answer:

Passive range of motion can be defined as what is achieved when an outside force, such as a therapist, causes movement of a joint. It is usually the maximum range of motion. Active range of motion is what can be achieved when opposing muscles contract and relax, resulting in joint movement

Answer:

225 m//s

Explanation:

It ran 5m/s so 5x45=225

Answer:

225 meters

Explanation:

If it is running 5 meters per seconds, and it ran 45 seconds, you would need to multiple the seconds it ran by the speed per second: 5 • 45

5 • 45 = 225

ANSWER:

D) 1584 m

EXPLANATION:

1) Convert seconds to minutes so we can see which velocity to use for the equation. Then convert the velocity from cm/s to m/s.

120 seconds = 2.0 minutes      (now we know what the velocity will be)

1320 cm/s = 13.2 m/s                (just divided by 100)

2) We can now find the distance by using the formula: distance = time x velocity

distance = 120 x 13.2        

distance = 1584 m

Note: the units for the time must be in seconds (s) and the units for velocity must be in m/s because when we multiply them, the seconds (s) cancel out/eliminate each other so that we are left with just metres (m) for distance.

The kinetic energy of a car with a mass of 1050kg and a velocity of 5m/s will be 13,125 joules or 13,125 kg⋅m2⋅s−2.

As we know, the formula to find the kinetic energy in a system is \(1/2 m v^{2}\) where m is the mass of the system and v is the given velocity at the moment. So , by putting the given data in the equation, we get :

⇒\(1/2mv^{2}\)

⇒1/2 x 1050 x 5 x 5

⇒525 x 25

⇒13,125

∴ The Kinetic energy of the car will be 13,125 Joules where joule is the SI unit of energy.

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The statement "When a permanent magnet is cut in half, one piece will be a north pole and one piece will be a south pole" is False.

When a permanent magnet is cut in half, it does not result in separating the magnet into distinct north and south poles. Instead, each resulting piece will still have its own north and south poles. This phenomenon is known as magnetic domain alignment. The domains within a magnet are regions where the magnetic moments of atoms align in the same direction, creating a magnetic field. Cutting a magnet disrupts the alignment of these domains, but it doesn't create isolated north and south poles on separate pieces.

Regardless of how a permanent magnet is divided, each resulting piece will have its own north and south poles. The magnetic field lines will still flow from the north pole to the south pole within each piece. Therefore, the statement "When a permanent magnet is cut in half, one piece will be a north pole and one piece will be a south pole" is false.

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The complete question is

which of the following statements concerning permanent magnets is false?- the direction of a magnetic field is indicated by the north pole of a compass-when a permanent is cut in half, one piece will be a north pole and one piece will be a south pole-the north pole of a permanent magnet is attracted to a south pole-magnetic field line outside a permanent magnet originate from the north pole and end on the south pole-all permanent magnets are surrounded by the magnetic field

The disadvantage of  easily changeable  digital data is: true information in the digital data can be changed to false information. Hence, option (D) is correct.

Digital data, in information theory and information systems, is information represented as a string of discrete symbols, each of which can take on one of only a finite number of values from some alphabet, such as letters or digits.

An example is a text document, which consists of a string of alphanumeric characters. The most common form of digital data in modern information systems is binary data.

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Answer:  The answer is  D.  

Explanation:   I took the test

The distance travelled by the ball from its starting position is 120 m.

option E is the correct answer.

The time of motion of the ball is calculated by applying the following kinematic equation as shown below.

v = u - gt

where;

At maximum height, final vertical velocity = 0

0 = u - gt

gt = u

t = u / g

t = ( 20 ) / ( 10 )

t = 2 s

The time taken for the ball to go up and come down = 2 x 2 s = 4 s

The horizontal distance travelled by the ball = 30 m/s x 4 s = 120 m

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The value of the resistance of R₂, given that the total resistance in the circuit is 15 ohms is 5 ohms (option D)

The following data were obtained from the question:

Total resistance in series connection is given by the following formula:

R = R₁ + R₂ + R₃ + ... + Rₙ

Inputting the various parameters given, we can obtain the resistance of R₂ as follow:

R = R₁ + R₂

15 = 10 + R₂

Collect like terms

R₂ = 15 - 10

R₂ = 5 ohms

Thus, we can conclude from the above calculation that the resistance of R₂ is 5 ohms (option D)

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Complete question:

See attached photo

Answer:

A surface wave is a wave that travels on the crust of the earth after an earthquake; surface waves cause the destruction of an earthquake

Explanation:

A surface wave is a wave that travels on the crust of the earth after an earthquake; surface waves cause the destruction of an earthquake

The subsequent current in the series RLC circuit is given by the equation: i(t) = I * cos(5t - Φ), where I is the amplitude of the current and Φ is the phase angle.

To find the subsequent current, we need to calculate the amplitude (I) and the phase angle (Φ) of the current.

First, let's calculate the resonant frequency (ω) of the circuit:

ω = 1 / √(LC) = 1 / √(10 * 10^(-2)) = 1 / √1 = 1 rad/s.

The applied voltage can be written as E(t) = E * cos(ωt), where E is the amplitude of the voltage.

Comparing this with the given voltage E(t) = 200 * cos(5t), we can equate the angular frequencies: ω = 5.

Now, let's find the impedance (Z) of the circuit:

Z = √(R^2 + (Xl - Xc)^2),

where R is the resistance, Xl is the inductive reactance, and Xc is the capacitive reactance.

R = 20 Ω

Xl = ωL = 1 * 10 = 10 Ω

Xc = 1 / (ωC) = 1 / (5 * 10^(-2)) = 20 Ω

Plugging in these values, we get:

Z = √(20^2 + (10 - 20)^2) = √(400 + 100) = √500 ≈ 22.36 Ω.

The amplitude of the current (I) can be calculated using Ohm's Law:

I = E / Z = 200 / 22.36 ≈ 8.94 A.

The phase angle (Φ) can be found using the relationship between resistance, inductive reactance, and capacitive reactance:

tan(Φ) = (Xl - Xc) / R = (10 - 20) / 20 = -0.5.

Therefore, Φ ≈ -0.464 rad.

The subsequent current in the series RLC circuit is given by i(t) = 8.94 * cos(5t + 0.464) A.

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A radioactive isotope's half-life is the length of time it takes for one half of it to decay.

The duration needed for a quantity of a radioisotope to decay by half is known as its radioactive half-life. If an isotope has a half-life of only a few hours or less, the majority of the radioactivity will dissipate within a few days.

A radioactive element's half-life is the amount of time it takes for it to decay to half of its original value. It can be concluded from this that a source's activity has a half-life if it takes some time before it drops to half its starting value.

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Answer:

b is the equivalent

do u want explanation

The voltmeter reading will typically increase as the light intensity increases if the voltmeter is connected to a photo-sensitive device like a photovoltaic cell. This is because a photovoltaic cell converts light energy into electrical energy, and as the light intensity increases, the output voltage of the cell will also increase. So, the voltmeter will show a higher reading when the light intensity is increased.

In summary, the steps are:
1. Increase the light intensity on a photovoltaic cell.
2. Observe the voltmeter connected to the cell.
3. As the light intensity increases, the voltmeter reading will typically increase due to the higher output voltage of the cell.

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The total energy of the body at evevry point is remained same due to the law of conservation of energy. Distance from A to B and final velocity of the ball just reach before C is 44.3 m/s.

d (distance) from A to B is = √2gh

In this case given are, g = 9.8 m/s² and h = 100m,

so here d = √(2⋅9.8⋅100) = 44.3m.

Final velocity ,v = √2gh

Here given are , v is the velocity, g is the acceleration due to gravity, and h is the height. In this case,

g = 9.8 m/s² ,h = 100m,

v = √(2⋅9.8⋅100)

= 44.3 m/s (final velocity)

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Both have same acceleration.

Both are at same speed

Ground at the same time as a acceleration produced in a body due to gravity is 9.8ms on earth, so both the bodies will accelerate with the same velocity.

Two orbiting neutron stars or black holes will gradually spiral toward each other as a result of energy being carried away by gravitational waves.

"Spacetime ripples were gravitational waves. When things move, the curvature of gravity alters, and these changes propagate outward as gravitational waves (like ripples on a pond). A supermassive black hole is a stretch & compress of space and hence can be determined by calculating the current in length among two objects.”

Even from the distance of the edge of the universe, cosmic rays would pass by us almost completely undetectable. Although these waves in spacetime convey more force than any other global catastrophe, the connections are so faint that they scarcely influence us.

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a) The mechanical energy of a system is conserved if air resistance is ignored. (b) For this situation, two types of potential energy exist: gravitational potential energy and elastic potential energy.

Explanation: If air resistance is not taken into consideration, the system will be in a state of total mechanical energy conservation. In the absence of air resistance, the kinetic energy and potential energy of the system remain constant, and the mechanical energy remains unchanged.

b) Both gravitational and elastic potential energies are two types of potential energy for this situation. Potential energy is the amount of energy stored in an object as a result of its location or configuration. It may also be stored in a system of objects, like a weight linked to a spring that is suspended from the ceiling vertically.

In a vertical direction, the weight has gravitational potential energy due to its position in the gravitational field of the Earth. The weight is at a specific height from the ground, and this height contributes to the object's potential energy.

The potential energy of a weight suspended from a spring is the second type of potential energy in this scenario. When the spring is stretched, it stores energy in the form of elastic potential energy. The spring's potential energy is transformed into kinetic energy as it vibrates up and down.

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Answer:

bchfdfu

hjoufu I'm not sure if you are still interested in the position and would like to know if you are interested

Correct answers for the above question would be: (a) The doorknob does not experience a centripetal acceleration during the part of its motion when it moves with constant speed. (b) The doorknob experiences a tangential acceleration as it moves with constant speed over most of its path. (c) The doorknob does not have a centripetal acceleration at the moment the door is open the widest. (d) The doorknob does have a tangential acceleration at the moment the door is open the widest.

Explanation:

What is a pneumatic device?

A pneumatic device is a device that converts energy stored in compressed gas into mechanical motion. Such a device, usually an air cylinder, produces linear motion or force from compressed air pressure. The energy is usually stored in compressed air, but it can also be stored in other gases like nitrogen.

What are the uses of pneumatic devices?

Pneumatic devices are widely used in industry, transportation, and many other applications. A pneumatic door closer is a device that uses compressed air to close doors automatically. It is used in hospitals, offices, and other buildings to help keep doors closed, reducing drafts and noise.

It also helps to keep the building secure by preventing unauthorized access. A pneumatic door closer works by using a spring-loaded piston to push the door closed. When the door is opened, the spring compresses and the piston is forced out of the cylinder, storing energy. When the door is released, the piston retracts, releasing the energy and pushing the door closed. Therefore, as the doorknob moves with constant speed over most of its path, it experiences a tangential acceleration.

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The acceleration of the center of mass of the cylinder is (2/3)g sinθ, and the minimum coefficient of friction between the cylinder and the inclined plane is μ_min = tanθ.

Acceleration is the rate of change of velocity of an object. It measures the rate at which an object's speed and direction changes. It is a vector quantity, meaning it has both magnitude and direction. Acceleration can be positive, negative, or zero. Positive acceleration indicates an object is speeding up, while negative acceleration indicates it is slowing down. Zero acceleration indicates an object is maintaining its current speed and direction.

Determine the translational speed of the cylinder when it reaches the bottom of the inclined plane.

b. Show that the acceleration of the center of mass of the cylinder while it is rolling down the inclined plane is (2/3)g sin theta.

c. Determine the minimum coefficient of friction between the cylinder and the inclined plane that is required for the cylinder to roll without slipping.

Answer:
a. The translational speed of the cylinder when it reaches the bottom of the inclined plane is given by v = (2gh sinθ/3)^1/2.

b. The acceleration of the center of mass of the cylinder is given by a = (2/3)g sinθ. This can be shown as follows: The acceleration due to gravity is g cos θ, so the normal force is Mg cos θ. The rotational inertia of the cylinder is 1/2MR², and its angular acceleration is a/R. By Newton's second law, the resultant force acting on the cylinder is ma = Mg cosθ - 1/2MR² a/R. Therefore, a = (2/3)g sinθ.

c. The minimum coefficient of friction between the cylinder and the inclined plane required for the cylinder to roll without slipping is μ_min = tanθ. This can be shown as follows: The force of friction acting between the cylinder and the inclined plane is given by F_f = μN = μMg cos θ. The force of friction must be equal to the centripetal force acting on the cylinder, which is Mv²/R. Therefore, μ = v²/gR = (2gh sinθ/3)^1/2/gR = tanθ.

In conclusion, we have shown that the translational speed of the cylinder when it reaches the bottom of the inclined plane is given by v = (2gh sinθ/3)^1/2, the acceleration of the center of mass of the cylinder is (2/3)g sinθ, and the minimum coefficient of friction between the cylinder and the inclined plane is μ_min = tanθ.

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Masses of gray matter deep within the cerebrum that inhibit motor activity are the basal ganglia.

The basal ganglia are a group of nuclei located deep within the cerebrum that play a crucial role in motor control and regulation. They are responsible for inhibiting motor activity and play a key role in the smooth and coordinated execution of movements. The basal ganglia work in conjunction with other brain regions, such as the motor cortex and thalamus, to regulate movement and help ensure that movements are smooth, purposeful, and well-coordinated. Dysfunction of the basal ganglia is associated with a number of movement disorders, such as Parkinson's disease and Huntington's disease.

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The electromagnetic radiation with a wavelength of 1.5 x 10⁻⁶ m corresponds to infrared radiation.

option D.

Electromagnetic waves are a form of radiation that travel though the universe.

So electromagnetic radiation consists of waves of the electromagnetic field, which propagate through space and carry momentum and electromagnetic radiant energy.

Examples of electromagnetic radiations include;

The electromagnetic radiation with a wavelength of 1.5 x 10⁻⁶ m corresponds to infrared radiation.

Thus, option D is the correct answer.

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Answer:

49kmph

Explanation:

speed=distance/time = 245/5

To convert kg/m3 to g/cm3, divide by 1000 because a kilogramme contains 1000 grammes and (100 cm)3 Equals 1 m3. So 1 kg/m3 equals 1/1000 g/cm3.

To convert from kg/m3 to g/cm3, just multiply the value in kg/m3 by 1000. We may use the conversion ratio 1 kg/m3 = 1/1000 g/cm3 to convert density units from kg/m3 to g/cm3. For example, if we have a density of 5 kg/m3, we can convert it to g/cm3 by doing the following: 5 kg/m3 equals 5/1000 g/cm3 = 0.005 g/cm3. Instead, we may convert units using dimensional analysis. We may devise a conversion factor based on the equivalency of 1 kg and 1000 g, as well as 1 m3 and (100 cm)3: 1 kg = 1000 g m³ = (100 cm)³ = 10^6 cm³ Then, we can multiply the density in kg/m³ by the conversion factor, making sure to cancel out the units of kg and m³:

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