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3 years ago

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Many years ago, scientists believed that an atom was the smallest unit of matter. Eventually, evidence was discovered that indic

ated this idea might not be accurate. What was the likely result of this discovery?

1 answer:

dybincka [34]3 years ago

7 0

Advances in technology used to study and observe atoms lead to the discovery of electrons, protons, nuetrons, and the quarq

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Your job is to lift 30 kgkg crates a vertical distance of 0.90 mm from the ground onto the bed of a truck. For related problem-s

Gekata [30.6K]

Answer:

The number of crates is 84580.

Explanation:

mass, m = 30 kg

height, h = 0.9 mm

Power, P = 0.5 hp = 0.5 x 746 W = 373 W

time, t = 1 minute = 60 s

Let the number of crates is n.

Power is given by the rate of doing work.

$P = \frac{n m gh}{t}\\\373 =\frac{n\times 30\times9.8\times 0.9\times 10^{-3}}{60}\\\\n =84580$

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2 years ago

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MrMuchimi

I think its <u>B</u> because it looks like it might indicate a future rain storm.

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3 years ago

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2 years ago

There are two equations from which a change in the gravitational potential energy u of the system of a mass m and the earth can

Colt1911 [192]

The change in the gravitational potential energy is represented by the equation
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2 years ago

A record spins at 33 rpm (revolutions per minute), which is an angular velocity of about 3.46 radians per second. What is the ap

lubasha [3.4K]

Hi there!

We can use the following equation to relate angular velocity to linear velocity.

$v = \omega r$

v = linear velocity (m/s)

ω = angular velocity (3.46 rad/sec)

r = distance from axis of rotation (.12 m)

Plug in the given values.

$v = (3.46)(.12) = \boxed{.415 \frac{m}{s}}$

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2 years ago