3 years ago

How many animals lost each hour

Physics

1 answer:

joja [24]3 years ago

6 0

Answer:

562

Explanation:

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This table shows experiments done by five scientists. Scientist Experiment Kyle cut a bar of gold in half Katie burned paper int

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Answer:

give graph

Explanation:

we need it to answer

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3 years ago

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Tcecarenko [31]

Answer:

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A tired physics professor can easily read the fine print of the financial page when the newspaper is held at arm's length, 61.5

leva [86]

Answer:

45.04 cm

Explanation:

The tired physics professor red easily at a distance of 26 cm

So v = 26 cm

And it is given that object distance that is u = 61.5 cm

There is relation between focal length object distance and image distance that is $\frac{1}{f}=\frac{1}{v}-\frac{1}{u}$

Here f =focal distance v = image distance and u = object distance

So $\frac{1}{f}=\frac{1}{26}-\frac{1}{61.5}$

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3 years ago

A 40kg rock is perched atop a cliff that is 50 m high. What is it’s potential energy?

LekaFEV [45]

Potential energy, is energy due to its position.

Given: Mass m = 40 Kg; Height h = 50 m

Required: Potential energy P.E = ?

Formula: P.E = mgh P.E = (40 Kg)(9.8 m/s²)(50 m)

P.E = 19,600 J

4 0

4 years ago

now suppose that we have attached not just two springs in series, but N springs. Write an equation that expresses the effective

sammy [17]

Answer:

$k_{eq} = \frac{k}{N}$

Explanation:

For this exercise let's use hooke's law

F = - k x

where x is the displacement from the equilibrium position.

x = $- \frac{F}{k}$

if we have several springs in series, the total displacement is the sum of the displacement for each spring, F the external force applied to the springs

x_ {total} = ∑ x_i

we substitute

x_ {total} = ∑ -F / ki

F / k_ {eq} = -F $\sum \frac{1}{k_i}$