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nignag [31]
3 years ago
14

Why can you see an electric bulb at night when it is switched on ?

Physics
1 answer:
Dominik [7]3 years ago
8 0

Answer:

Explanation:

Because when the electric bulb at night switched It emitted the light this light rays forms an image on our retina hence the bulb become visible at night

2 ans

When an electric bulb is switched on, the electricity is allowed to pass in its circuit and is converted into light energy. Thus, a bulb glows when switched on and the eyes perceives the light energy in the visible spectra which is given out by the bulb. Hence, the bulb becomes visible

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Pluto has a shape that is nearly round,and it orbits the sun,it has five known moons.why is it called a dwarf planet and not a p
s2008m [1.1K]

There are three things needed to be classified as a planet.

Pluto meets 2 of the 3.

The one it does not meet is it doesn’t “clear the neighborhood” which means a planet needs to be gravitationally dominant over all objects around it. Meaning smaller bodies ( asteroids) would either combine with the larger body making it bigger or pushing them away ( out of their orbit) so they do not collide with the larger body.

8 0
3 years ago
If you increase the mass but keep force constant what will happen to the acceleration of the object
drek231 [11]

Answer:accelaration will decrease because forse is inversly proportional to mass.

Explanation:

3 0
3 years ago
A room that has an average ambient sound pressure level of 62 dBA and a maximum sound pressure level lasting more than a minute
cupoosta [38]

Answer:

Explanation:

A fire alarm notification appliance is an active fire protection component of a fire alarm system. The primary function of the notification appliance is to alert persons at risk.

If want the audible public mode signal to be hear clearly then, we need to have a sound level that is at least 15dB above the average ambient sound level or 5dB above the maximum sound level of at least 1minute

In this case the,

The average ambient sound level is 62dB,

And the maximum sound level is 68dB

Then, the public mode signal should be at least

1. 62dB+ 15dB=77dB

Or

2. 68dB +5dB =73dB.

Then the public mode signal hearing must be at least 77dB.

6 0
4 years ago
1. How much power does a light bulb contain if it does 600J of work in 5 seconds?
dimaraw [331]

Answer:

120 watts

Explanation:

#1: 120 watts

#2: 667 watts

#3: 3 watts

#4: i forgot how to do this one

5 0
3 years ago
An electromagnet is strong enough to lift 200 kg of mass. If you double the number of turns of wire around the core and triple t
jekas [21]

Magnetic field is proportional to NIA.

N is the number of turns, I is the current and A is the area

You see N=2n, I = 3 i. Therefore, it will 6 times stronger

200*6= 1200 kg. It can lift now is 1200 kg.

6 0
3 years ago
Read 2 more answers
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