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frosja888 [35]
3 years ago
9

Lifting a piano into a truck is an example of doing negative work. A. True B. False

Physics
1 answer:
Elis [28]3 years ago
5 0

Answer:

False

Explanation:

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Explain the relation between Joule and Erg.​
LekaFEV [45]

Answer:

Both erg and Joule are units of Energy in the CGS and S.I system respectively.

Joule and erg can also be written as (kg m2/s2) and (g cm2/s2) respectively.

Explanation:

1 Joule = 107 erg ⇒ 107 kg m2/s2.

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1 year ago
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A charge of 4.4 10-6 C is located in a uniform electric field of intensity 3.9 105 N/C. How much work (in Joules) is required to
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Answer:

The work required to move this charge is 0.657 J

Explanation:

Given;

magnitude of charge, q = 4.4 x 10⁻⁶ C

Electric field strength, E =  3.9 x 10⁵ N/C

distance moved by the charge, d = 50 cm = 0.5m

angle of the path, θ = 40°

Work done is given as;

W = Fd

W = FdCosθ

where;

F is the force on the charge;

According the coulomb's law;

F = Eq

F = 3.9 x 10⁵ x 4.4 x 10⁻⁶  = 1.716 N

W = FdCosθ

W = 1.716 x 0.5 x Cos40

W = 0.657 J

Therefore, the work required to move this charge is 0.657 J

4 0
3 years ago
What is the relationship between karst development and topography?
mylen [45]
The karst topography is typically defined as a geographic location characterized by a rugged terrain containing landscapes like underground rivers, fissures, and cracks. It is mainly due to the dissolution of the bedrock due to a much heavier precipitation taking place in the geographic location.
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3 years ago
The force F is expressed in terms of the mass “m” and acceleration “a” according to the
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Answer:

F = [M] × [L1 T-2] = M1 L1 T-2.

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