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3 years ago

One of the major differences between our common Physics models of energy change and realistic models of them is:

Physics

2 answers:

Vitek1552 [10]3 years ago

6 0

Answer:

In the Physics models, we do not take into account the energy change by the friction of moving components

Oksana_A [137]3 years ago

5 0

Answer:

In the Physics models, we do not take into account the energy change by the friction of moving components

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What is the frequency of a wave having a period equal to 18 seconds

Orlov [11]

Frequency is 1 over the period. Hence, the frequency is 1/18.

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3 years ago

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Which is occurring when work is being done?

sineoko [7]

Answer:

When work is being done, the practie of labor is being performed. When work isn't being completed, this is a sign of procrastination.

Explanation:

In the answer.

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3 years ago

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7. You start to walk toward the east towards home at a constant speed of 4 km/hr. At the same time, Someone else leaves your hom

amm1812

A) position time graph for both is shown

here one of the graph is of lesser slope which means it is moving with less speed while other have larger slope which shows larger speed

At one point they intersects which is the point where they both will meet

B) Let the two will meet after time "t"

now we can say that

if they both will meet after time "t"

then the total distance moved by you and other person will be same as the distance between you and home

so it is given as

$v_1t + v_2t = d$

$4*t + 28*t = 3.2 km$

$t = \frac{3.2}{32} = 0.1 hr$

so they will meet after t = 6 min

so from position time graph we can see that two will meet after t = 6 min where at this position two graphs will intersect

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4 years ago

a 25 kg object is pushed with a horizontal force of 5 N esat across a table. If the force of friction is 2 N, what is the accele

Julli [10]

Answer:

Apply Newton's second law in the moving direction.

Explanation:

$\begin{aligned}F &= ma\\5N-2N &= 25kg\times a\\a & = \frac{3N}{25kg}\\&= 0.12ms^{-2}\end{aligned}$

Friction force applies in the opposite direction of motion; as a restriction.

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3 years ago

Reflected waves change their wavelength by ______ when reflected.

natita [175]

Answer:

i think its c

Explanation:

trust me

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2 years ago