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notka56 [123]
2 years ago
14

If a person does 20 J of work on a book in 10 seconds, how powerful was the person while doing the work?

Physics
1 answer:
Korolek [52]2 years ago
4 0

Answer:

2 W

Explanation:

P = W/t

= 20 J / 10 s

= 2 W

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The black lines that wrap themselves around a basketball represent an example of what type of geometry?
Dmitry [639]
In Euclidean geometry parallel lines never intersect. But in non-Euclidean geometry parallel lines can either curve away from each other, or curve towards each other. Example : the black lines that wrap themselves around the basketball.
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3 years ago
A solid metal sphere with radius 0.430 m carries a net charge of 0.270 nC . Part A Find the magnitude of the electric field at a
rodikova [14]

Answer:

8.46 N/C

Explanation:

Using Gauss law

E=\frac {kQ}{r^{2}}

Gauss's Law states that the electric flux through a surface is proportional to the net charge in the surface, and that the electric field E of a point charge Q at a distance r from the charge

Here, K is Coulomb's constant whose value is 9\times 10^{9} Nm^{2}/C^{2}

r = 0.43 + 0.106 = 0.536 m

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8 0
4 years ago
What is the physical property of a star used to classify the stars by spectral type?
BigorU [14]

Answer:

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Explanation:

4 0
3 years ago
. Calculate the work done by an elevator as it lifts 12 occupants up 21 floors (76.8 meters) at a constant speed. The average ma
ratelena [41]

Answer:

W = 4832

Explanation:

Given:

Force = 62.8 Kg

Distance = 76.8 m

Find :

work done = ?

Formula :

W = Fd

Solution:

W = Fd

W =(62.8 kg)(76.8 m)

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6 0
3 years ago
How many meters in 32 kilometers
Alisiya [41]
Hello !

32 km = 32000 m
7 0
3 years ago
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