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4 years ago

The table lists the mass and charge of a proton and a neutron.

Physics

2 answers:

Anastasy [175]4 years ago

5 0

B. The gravitational force is much larger than the electrical force for any distance between the particles.

Oliga [24]4 years ago

5 0

The answer is letter B

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Consider a block on frictionless ice. Starting from rest, the block travels a distance din

sweet [91]

Answer:

<em>The distance is now 4d</em>

Explanation:

<u>Mechanical Force</u>

According to the second Newton's law, the net force exerted by an external agent on an object of mass m is:

F = m.a

Where a is the acceleration of the object.

The acceleration can be calculated by solving for a:

$\displaystyle a=\frac{F}{m}$

Once we know the acceleration, we can calculate the distance traveled by the block as follows:

$\displaystyle d = vo.t+\frac{at^2}{2}$

If the block starts from rest, vo=0:

$\displaystyle d = \frac{at^2}{2}$

Substituting the value of the acceleration:

$\displaystyle d = \frac{\frac{F}{m}t^2}{2}$

Simplifying:

$\displaystyle d = \frac{Ft^2}{2m}$

When a force F'=4F is applied and assuming the mass is the same, the new acceleration is:

$\displaystyle a'=\frac{4F}{m}$

And the distance is now:

$\displaystyle d' = \frac{4Ft^2}{2m}$

Dividing d'/d:

$\displaystyle \frac{d' }{d}=\frac{\frac{4Ft^2}{2m}}{\frac{Ft^2}{2m}}$

Simplifying:

$\displaystyle \frac{d' }{d}=4$

Thus:

d' = 4d

The distance is now 4d

3 0

3 years ago

A 4.0 kg mass is attached to a spring whose spring constant is 950 N/m. It oscillates with an amplitude of 0.12 m. What is the m

Fudgin [204]

Answer:

velocity = 2.62m/s

Explanation:

950= (4 x A)/0.12

950 x 0.12 = 4 x A

114 = 4 x A

A = 114/4

A = 28.5m/s²

U²=2as
U² = 2 x 28.5 x 0.12
U² = 6.84
U = √6.84
U = 2.62m/s

3 0

3 years ago

PLEASE HELP ASAP!!!!!

liq [111]

Answer:

r = 0.37 m

Explanation:

Use Coulomb's law to solve for r:

F = kq1q2/r^2

---> r^2 = kq1q2/F

= (8.99×10^9)(5.6×10^-4)(-2.1×10^-4)/(-7.7×10^3)

= 0.1373 m^2

or r = 0.37 m

4 0

3 years ago

Donna shines a flashlight and a laser pointer on a sheet of paper. She holds each device at an equal distance from the paper. Ho

hjlf

Answer:

A the light on the flash light lights up a bigger area

I'm pretty sure this is right.

Explanation:

6 0

3 years ago

Read 2 more answers

Explain the roles of piston valve of a water pump.

Shtirlitz [24]

Answer:

The upstroke of the piston draws water, through a valve, into the lower part of the cylinder. On the downstroke, water passes through valves set in the piston into the upper part of the cylinder. On the next upstroke, water is discharged from the upper part of the cylinder via a spout.

Explanation:

4 0

3 years ago