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defon
3 years ago
12

A dog exerts a force of 30N to move a wagon 2m in 5s. What is the power of the dog

Physics
1 answer:
Hunter-Best [27]3 years ago
6 0

Explanation:

power=f×v. recall= distances/ time

= f× d/t

= 30 × 2/5

=12watt

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3 years ago
Several wires of varying thickness are all made of the same material and all have the same length. If the wires are arranged in
aev [14]

Answer:

Option A is correct.

The wires will be arranged in order of increasing resistance.

Explanation:

The resistance of a wire is given by

r = (ρl)/A

where r = resistance of the wire

ρ = resistivity of the wire

L = length of the wire

A = cross sectional area of the wire

Provided all the other parameters are constant, resistance is inversely proportional to cross sectional area

r ∝ (1/A)

And the the cross sectional Area of the wire increases with increase in thickness & decreases with thickness

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3 years ago
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3 years ago
A __________ provides a visual summary of the improvements that a data mining project provides on a binary classification proble
babymother [125]

Answer:

Option (B)

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5 0
4 years ago
The intensity of the Sun's light in the vicinity of the Earth is about 1000W/m^2. Imagine a spacecraft with a mirrored square sa
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Explanation:

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             F = \frac{dP}{dt}

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or,           p = \frac{E}{c}

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Thus, we can conclude that the thrust is 201.67 N.

8 0
4 years ago
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