A person is pulled to the right on a sled (total mass of 52.9 kg) across the surface of a frozen pond with a force of 67.7 Newtons so that they move with a constant velocity. What is the force of friction acting on the sled?

Answer: The correct option is D.

Explanation:

Thermal energy is the internal energy of the object due to the motion of the particles.

The kinetic energy is due to the motion of the particles. If the system has kinetic energy then it will have thermal energy.

When the object's atoms move faster then the thermal energy  increases.

Therefore, the correct answer is thermal energy.

As we know that equivalent resistance of a capacitor for an AC circuit is given as

so here for an AC circuit capacitor will provide less resistance to AC component of the current

While for DC as we know it has ZERO frequency

so we will have large resistance

so here we will have to use capacitor as a filter circuit which will separate AC component of current from the DC current

So correct answer will be

CAPACITOR

Final answer:

A diode is the component used to convert alternating current (AC) to direct current (DC), often arranged in a configuration known as a rectifier.

Explanation:

The component used to change alternating current (AC) to direct current (DC) is a diode. A diode is a semiconductor device with two terminals, typically allowing the flow of current in one direction only. In the case of converting AC to DC, a configuration known as a rectifier, often built with diodes, is used. This rectifier changes the AC, which is current that shifts direction, into DC, which is current that flows consistently in one direction.

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Answer:

1)   v = u + at

     s = ut + 1/2 at²

     v² = u² + 2as

2) The distance is equal to the displacement when their magnitude is the same.

3) Acceleration is a vector quantity

4) Mass is the quantity of matter present in a body. Its SI unit is Kg. The weight is the action of gravitational force on the body. Its SI unit is newton.

5)  G - Universal gravitational constant (6.673 x 10⁻¹¹ Nm²Kg⁻²

     g - acceleration due to gravity (9.8 m/s²)

6) It is because the magnitude of the attractive force between two people is negligible when compared with the gravitational force of Earth.

7) In a uniform circular motion, the body is continuously changing its direction. If there is a change in the direction there is an act of force acting on the body. It will in accelerated motion.

8) Due to the lesser gravitational force of the moon, the weight of the person on the moon is very low compared with the weight of the person on Earth. On the surface of the moon, the person will experience only 16.5% of his weight on the Earth.

9) The rate of change of velocity by time gives acceleration. Therefore the acceleration of the ship is when the velocity is converted to m/s

                                       a = (16.11 - 15.56)/1

                                        a = 0.55 m/s²

10) The area is equal to the displacement

11) The seat belt stops the movement of a body where newton's first law is applicable.

12) The pressure acting on a body is inversely proportional to the surface area. So, when the surface area is the increased impact of pressure on the shoulders can be minimized. So, the schoolbags have wider straps.

13) The camels have broader toe compared to the toe of the horse. So, it can walk easily through the sands.

Thewave speed will be 210 m/sec. The wave speed is found as the product of the wavelength and frequency of the wave.

What is wavelength?

The distance between two successive troughs or crests is known as the wavelength. The peak of the wave is the highest point, while the trough is the lowest.

The relationship between the wave's wavelength, time, and speed is given as;

Wavelength = speed of wave / time period

Hence, the wave speed will be 210 m/sec.

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Answer:23hz

Explanation:

Jose wandered for 2 hour with speed at 2 kilometers per hour.

What is speed?

The speed of an item, which is a scalar quantity in everyday usage and kinematics, is the size of the change in that object's position over time or the size of the change in that object's position per unit of time.

The instantaneous speed is the upper limit of the average speed as the duration of the time interval approaches zero. The average speed of an item in a period of time is equal to the distance travelled by the object divided by the duration of the period.

Given parameters:

Distancetravelled by Jose = 4 kilometer.

Speed of Jose = 2 kilometers per hour.

Now from definition of speed:

Total time taken = Distance travelled by Jose ÷ Speed of Jose

= 4 kilometer ÷ 2 kilometers per hour.

= 2 hour.

Hence,  Jose wandered for 2 hour.

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