3 years ago

A scientist heats a red powder. Upon heating, a liquid and a gas form.

Physics

1 answer:

puteri [66]3 years ago

3 0

Answer:

Compound

Explanation:

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When the speed of an object changes, what happens to its velocity?

vova2212 [387]

Answer:

Its velocity also changes

Explanation:

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3 years ago

A truck travels 6 meters in the first second of travel, 6 meters again during another second of travel, and 6 meters again durin

Alexandra [31]

D. Assuming that it doesn’t accelerate and then decelerate between seconds.

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A car initially traveling at 27.7 m/s undergoes a constant negative acceleration of magnitude 2.00 m/s2 after its brakes are app

lys-0071 [83]

The car's velocity at time t is given by

$v=27.7\dfrac{\rm m}{\rm s}+\left(-2.00\dfrac{\rm m}{\mathrm s^2}\right)t$

It comes to a stop when v = 0, which happens when

$0=27.7\dfrac{\rm m}{\rm s}+\left(-2.00\dfrac{\rm m}{\mathrm s^2}\right)t\implies t=13.85\,\mathrm s$

or after about 13.9 s.

In this time, the car travels a distance x given by

$x=\left(27.7\dfrac{\rm m}{\mathrm s}\right)(13.85\,\mathrm s)+\dfrac12\left(-2.00\dfrac{\rm m}{\mathrm s^2}\right)(13.85\,\mathrm s)^2=191.823\,\mathrm m$

or about 192 m.

In one complete revolution, each tire covers a distance equal to its circumference,

$2\pi(0.340\,\mathrm m)\approx2.13628\,\mathrm m$

or about 2.14 m.

This means each tire will complete approximately 192/2.14 ≈ 90 revolutions.

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3 years ago

A toy car has a 1.5 A current, and its resistance is 2 Ω. How much voltage does the car require?

AfilCa [17]

3v i think is the answer

3 0

3 years ago

Read 2 more answers

A physicist attempts to use Newton's laws of motion to predict the behavior of a molecule of water, but the laws fail to give ac

adell [148]

Answer:

B) The molecule is small enough so that quantum effects are important.

Explanation:

The molecules of water behave like wave and their motion cannot be accurately predicted by classical physics laws but can be properly predicted by quantum theory.

Classical physics describes matter that behave like solid particles while quantum effect describes matter that behaves like waves.

Therefore, the correct option is B.

6 0

3 years ago