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zhannawk [14.2K]

3 years ago

7

hich best explains why no current is induced? The wire needs to be coiled less tightly. The wire needs to be straight, not coile

d. The magnet needs to be moved through the coils of wire. The magnet needs to be held above the coils of wire.

1 answer:

Dahasolnce [82]3 years ago

7 0

The magnet needs to be held above the coils of wires

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4. Jimmy dropped a 10 kg bowling ball from a building that is 25 meters high.

KIM [24]

Answer:

The K.E of the bowling ball right before it hits the ground, K.E = 2450 J

Explanation:

Given data,

The mass of the bowling ball, m = 10 kg

The height of the building, h = 25 m

The total mechanical energy of the body is given by,

E = P.E + K.E

At height 'h' the P.E is maximum and the K.E is zero,

According to the law of conservation of energy, the K.E at the ground before hitting the ground is equal to the P.E at 'h'

Therefore, P.E at 'h'

P.E = mgh

= 10 x 9.8 x 25

= 2450 J

Hence, the K.E of the bowling ball right before it hits the ground, K.E = 2450 J

3 0

3 years ago

I select true helllpppp me

yanalaym [24]

Answer:

your right answer is true

hope it helps you

3 0

3 years ago

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Hiran is standing beside the road when he hears a bird flying away from hip and chirping. The bird’s chirp has a frequency of 18

Murrr4er [49]

The frequency of bird chirping hear by hiran will be 1.77 kHz.

<u>Explanation:</u>

As per Doppler effect, the observer will feel a decrease in the frequency of the receiving signal if the source is moving away from the observer. So the shifted frequency is obtained using the below equation:

$f'=\frac{c}{c+v_{s} }f$

Here , c is the speed of sound, Vs is the velocity of source with which it is moving away. f is the original frequency of source and f' is the frequency shift heard by the observer.

As here, f = 1800 Hz, Vs= 6 m/s and c = 343 m/s, then

$f'=\frac{343}{343+6} \times 1800=1.77\ kHz$

So, the frequency of bird chirping hear by hiran will be 1.77 kHz.

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3 years ago

As rotational speed increases, thrust____?

never [62]

Increases exponentially is your correct answer

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3 years ago

LPG is a better domestic fuel than wood?

Liula [17]

Answer:

it is because it do not produce smoke like fuel from wood.

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