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Fantom [35]
4 years ago
13

What are some of the physical properties of stars?

Physics
1 answer:
Arisa [49]4 years ago
8 0
Distance, luminosity, brightness, radius, chemical composition and temperature
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Which of the following actions is NOT
Eduardwww [97]

Answer:

b

Explanation: because it wont effect the animals home

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3 years ago
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A crane used 250,000 Joules of work to move a beam to the top of a building in 20 seconds. How much power did the crane use?
maria [59]

Answer:

12500W

Explanation:

Given parameters:

Work done  = 250000J

Time taken  = 20s

Unknown:

Power of the crane = ?

Solution:

Power is the defined as the rate at which work is being done;

  Mathematically;

        Power = \frac{work done}{time }

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3 years ago
A TMS (transcranial magnetic stimulation) device creates very rapidly changing magnetic fields. The field near a typical pulsed-
GrogVix [38]

Explanation:

It is given that, the field near a typical pulsed-field machine rises from 0 T to 2.5 T in 200 μs

Change in magnetic field, dB=2.5\ T

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Diameter, d = 2.3 cm

Radius, r = 0.0115 m

Emf is induced in the ring as the field changes. It is given by :

E=\dfrac{d\phi}{dt}

E=\dfrac{d(B.A\ cos(0))}{dt}

E=A\dfrac{d(B)}{dt}

E=\pi (0.0115)^2\dfrac{2.5}{2\times 10^{-4}}

E = 5.19 volts

So, the emf induced in the ring is 5.19 volts. Hence, this is the required solution.

5 0
3 years ago
What is the magnitude of the centripetal
zepelin [54]

Answer:

7.5

Explanation:

4 0
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How does an electric iron work when the power is on​
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