What is meant by power rating of an appliance? A bulb is rated as 60 W, 220V.What does itindicate?

Answers

Answer 1

Answer: Power is the physical quantity that indicates how much energy is converted by an electrical equipment in a given unit of time.

If a bulb is indicated as 220V, 60 W this means that the bulb turns 60 J of electrical energy into heat and light energy per second.

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Who was Albert Einstein?
A train starting from a distance of velocity of 90 km.h-1 in 10 minutes assuming that the acceleration is uniform find the acceleration and the distance travelled by the train for attending the velocity
During a thunderstorm, you should crouch under a tree for shelter. a. True b. False
When evaluating promotional claims, it is important to __________.a.do your own research c.determine if there are other possible solutions b.ask if it makes sensed.all of the above
A small 20-kilogram canoe is floating downriver at a speed of 2 m/s. What is the canoe's kinetic energy?

Define escape velocity?

Answers

escape velocity is the minimum velocity required for an object to come out of the gravity of earth or any planet !

for earth , it is 11.2 km/sec

What causes light to bend when it moves from one transparent medium to another?a change in amplitude

a change in color

a change in frequency

a change in speed

Answers

Answer:

A change in speed

Explanation:

Light bends when it moves at a particular angle into a medium that has a different refractive index than the one it was coming from.

This bending is as a result of the change in speed of light as it enters the medium with a different refractive index.

This action is known as Refraction of light.

Refraction depends on the change in speed of light as it changes media and the angle of refraction depends on the angle of incidence of the ray of light and the refractive index of the material.

Whenever light goes from transparent to another medium or from rarer to denser medium or vice versa, it's speed changes and hence light bends.

Prior to determining the experimental design, a scientist typically? A. makes observations. B. forms a hypothesis. C. performs an experiment. D. predicts the result of an experiment.

Answers

Prior to determining the experimental design, a scientist typically forms a hypothesis. The answer is letter B. this is to prepare the scientist, the possible outcome of their research before the experimental design whether they are wrong or not.

Quan sát sóng dừng trên sợi dây dài 60cm cố định hai đầu, thấy có 3 nút (bao gồm cả hai nút hai đầu) và 2 bụng. Bước sóng của sóng lan truyền trên sợi dây là:
A. 30cm. B. 40cm. C. 20cm. D. 60cm.

Answers

Answer:

Quan sát sóng dừng trên sợi dây dài 60cm cố định hai đầu, thấy có 3 nút (bao gồm cả hai

nút hai đầu) và 2 bụng. Bước sóng của sóng lan truyền trên sợi dây là:

Two of the three tuning forks have known frequencies. When a 510 Hz. fork and the unknown fork are struck together, four beats per second are heard. When a 505 Hz. fork is struck with the unknown fork, beats are produced that are too numerous to count accurately. What is the frequency of the unknown fork?

Answers

4 Hz is the difference between 510 and the unknown.
Therefore the unknown is either 514 or 506.

If 505 and 506 were struck together, the diff would be 1 Hz
If 505 and 514 were struck toghether, the diff would be 9 Hz which would be difficult to count accurately,

Therefore the unknown is 514

Answer:

514Hz

Explanation:

510 - unknown = 4Hz

unknown = 514 or 506

505 - unknown = numerous

unknown is most likely 514 because 1 beat that wouldve resulted from the 506 Hz isn't numerous.

What type of lens is used to make objects appear smaller and clearer convex or concave?

Answers

The answer is Concave lenses

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A stone is thrown with an initial velocity of 20 meters per second straight upward from the edge of a cliff 100 meters above a canyon floor. The stone just misses the cliff'a edge on its way down. (Neglect friction) Calculate the time required for the stone to reach its maximum height. Calculate the maximum height of the stone above the edge of the cliff.

Every 10 seconds a pendulum completes 2 cycles. what are the period and frequency of this pendulum