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Mumz [18]
3 years ago
6

A permanent magnet cannot be used in electrical bell .Why?​

Physics
2 answers:
Zielflug [23.3K]3 years ago
8 0

Answer:

we can not use permanent magnets in radio and electric bells , because permanent magnets loose their property after some time whereas we can change the properties of electromagnet.

sladkih [1.3K]3 years ago
6 0
What he said, yup!! ^^^
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In order to predict whether a star will eventually fuse oxygen into a heavier element, you mainly want to know what fact about t
Strike441 [17]

In order to predict whether a star will eventually fuse oxygen into a heavier element, you mainly want to know about the star's mass.

<u>Explanation:</u>

Stellar evolution is procedure by which star experiences a succession of radical change during its lifetime. Depending upon the mass of stars, this lifetimes range from just two or three million years for most big to the trillions of years for a least massive, which is significantly longer or more than the age of universe.

All stars are conceived from falling billows of gas and residue, frequently called nebulae or sub-atomic mists. Throughout a large number of years, the protostar settles down into a condition of balance, turning out to be what is also known as the main- sequence - star.

6 0
3 years ago
A 40kg rock is perched atop a cliff that is 50 m high. What is it’s potential energy?
LekaFEV [45]
Potential energy, is energy due to its position.

Given: Mass m = 40 Kg;  Height h = 50 m

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4 0
4 years ago
what is the purpose of a domain in science? do not copy any thing of the internet and they are not the right answer. I am learni
Leya [2.2K]

Answer:

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4 0
3 years ago
A motorist makes a trip 180 miles. For the first 90 miles she drives the remaining distance of her speed for the total trip is t
Minchanka [31]

so first your going to use v=Δd/Δt given you the answer 80 i think that's right

3 0
3 years ago
every morning Tom walks along a straight road from his home to a bus stop,a distance of 160 meters.The graph shows his journey o
Assoli18 [71]

Answer:

Tom walked until he was 100 metres from his home. Then, he realised that he had dropped his homework, so he turned around and went 60 metres to pick it up again. He again turned back and started to walk faster to get to the bus stop on time. He got to the bus stop 100 seconds after leaving his home and waited for the bus.

Explanation:

4 0
3 years ago
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