2 years ago

Unbalanced forces cause a change in motion. How do you know this?

1 answer:

5 0

Answer:

This happens in two ways. If an object is at rest and an unbalanced force pushes or pulls the object, it will move. Unbalanced forces can also change the speed or direction of an object that is already in motion.

Explanation:

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A 110-pound person pulls herself up 4.0 feet. This took her 2.5 seconds. How much power was developed?

mrs_skeptik [129]

Answer:

0.32 Hp is the answer. right

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2 years ago

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3 years ago

Chromium has the electron configuration 4s1 3d5 beyond Argon. What are the L and S values?

Marizza181 [45]

Answer: Chromium

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Explanation:

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3 years ago

A fixed 15.3-cm-diameter wire coil is perpendicular to a magnetic field 0.77 T pointing up. In 0.20 s , the field is changed to

maksim [4K]

Answer:

Induced emf will be 0.468 volt

Explanation:

We have given diameter of wire d = 15.3 cm

So radius $r=\frac{d}{2}=\frac{15.3}{2}=7.65cm$

So area $A=\pi r^2=3.14\times (7.65)^2=183.76\times 10^{-4}m^2$

Change in magnetic field dB = 0.26 - 0.77 = -0.51 T

Time for change in magnetic field dt = 0.26 sec

We know that emf is given by $e=\frac{-d\Phi }{dt}=-A\frac{dB}{dt}=-183.76\times 10^{-4}\times \frac{-0.51}{0.2}=0.0468volt$

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3 years ago

Why do sex cells contain only half the number of chromosomes needed for offspring? Explain

Bogdan [553]

Answer:

None, egg cells don't have chromosomes. No, sex cells do have chromosomes. Meiosis reduces chromosome number so that sex cells (eggs and sperm) have a half set of chromosomesâ€“one homolog of each pair. This is the haploid number.

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3 years ago