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4 years ago

You calculate that the maximum static friction is 420N. If you apply 500N of force, will the couch slide?

1 answer:

5 0

Assuming that the entirety of the force is opposite the static friction, then the couch should begin sliding as the applied force overcomes the couch's static friction with what it's making contact with.

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proton is accelerated to a speed of 0.93c, what is the 1. A proton has a mass of 1.673 x 10-27 kg. If the proton is accelerated

coldgirl [10]

Answer : The correct option is, (B) $1.3\times 10^{-18}kg.m/s$

Explanation : Given,

Mass of proton = $1.673\times 10^{-27}kg$

Speed of proton = 0.93 c

Formula used for relativistic momentum of the proton is:

$p=\frac{m_ov}{\sqrt{1-\frac{v^2}{c^2}}}$

where,

p = relativistic momentum of the proton

$m_o$ = mass of proton

v = speed of proton

c = speed of light = $3\times 10^8m/s$

Now put all the given values in the above formula, we get:

$p=\frac{(1.673\times 10^{-27}kg)\times (0.93c)}{\sqrt{1-\frac{(0.93c)^2}{c^2}}}$

$p=\frac{(1.55589\times 10^{-27}c)}{0.367}$

$p=\frac{(1.55589\times 10^{-27})\times (3\times 10^8)}{0.367}$

$p=1.272\times 10^{-18}kg.m/s\approx 1.3\times 10^{-18}kg.m/s$

Therefore, the relativistic momentum of the proton is, $1.3\times 10^{-18}kg.m/s$

5 0

3 years ago

a student standing in an elevator at rest notices that her pendulum has a frequency of oscillation of 0.5 Hz. a. what is the len

EastWind [94]

Answer:

L = 0.99 m = 99 cm

Explanation:

The period is the reciprocal of the frequency.

T = 1/0.5 = 2.0 s

T = 2π√(L/g)

L = g(T/2π)²

L = 9.8(2.0/2π)² = 0.99 m

If the system accelerates upward, it will cause the apparent gravity to increase. This will require a longer pendulum to keep the same period, or shorten the period if the length remains the same. This shows up in the equation where the product of gravity and the square of the period must remain constant for the length to remain constant.

5 0

3 years ago

How do the lungs help maintain the body's pH balance?

-Dominant- [34]

Answer:by removing carbon dioxide from the body

Explanation:

I just got it right

5 0

3 years ago

Three students attempt to define what it means for lines lll and mmm to be perpendicular. Can you match the teacher's comments t

Ber [7]

Incompletevquestion. However, I inferred from a general perspective about perpendicular lines.

Explanation:

Put simply, perpendicular lines are lines that are at right angles (90°) to each other. Thus, we could say based on this definition that for lines lll and mmm to be perpendicular they intersect and be at right angles (90°) to each other as found on the attached image.

3 0

3 years ago

A 2.7-kg ball is thrown upward with an initial speed of 20.0 m/s from the edge of a 45.0 m high cliff. At the instant the ball i

scoray [572]

Answer:

The distance traveled by the woman is 34.1m

Explanation:

Given

The initial height of the cliff

yo = 45m final, positition y = 0m bottom of the cliff

y = yo + ut -1/2gt²

u = 20.0m/s initial speed

g = 9.80m/s²

0 = 45.0 + 20×t –1/2×9.8×t²

0 = 45 +20t –4.9t²

Solving quadratically or by using a calculator,

t = 5.69s and –1.61s byt time cannot be negative so t = 5.69s

So this is the total time it takes for the ball to reach the ground from the height it was thrown.

The distance traveled by the woman is

s = vt

Given the speed of the woman v = 6.00m/s

Therefore

s = 6.00×5.69 = 34.14m

Approximately 34.1m to 3 significant figures.

3 0

3 years ago