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3 years ago

What are two ways electromagnetic waves are used in a home computer scanner?

Physics

2 answers:

miss Akunina [59]3 years ago

8 0

Answer:

A and B

Explanation:

lilavasa [31]3 years ago

3 0

Answer:

A and B

Explanation:

A P E X , just took the quiz and got it right

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The distance between a proton and an electron is cut in half. How does the force of attraction change?

miv72 [106K]

According to Coulomb’s Law, the force will quadruple.

However…

Let’s assume, for the sake of argument, that both proton and electron behave entirely like particles.

The trajectory of the electron will stretch, and its distance from the nucleus will oscilate until is estabilizes again at the original value.

4 0

3 years ago

Read 2 more answers

A spaceship travels at a constant speed from earth to a planet orbiting another star. When the spacecraft arrives, 12 years have

tigry1 [53]

Answer:

$7.2878\times10^{16} m$

Explanation:

Time elapsed on Earth $d_{t}$ = 12 years

Time elapsed on board the ship $d_{t_o}$ = 9.2 years

now r= $\frac{d_{t} }{d_t_o}$ = 12/9.2= 1.3043

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

$v= 3\times10^8 \sqrt{1-\frac{1}{1.3043^2}}$

v= $1.9258\times10^8$

therefore distance L= $d_{t}\times v$

putting value we get

= $12\times\times1.9258\times10^8$

= $12\times\times365\times24\times3600\times1.9258\times10^8$

= $7.2878\times10^{16} m$

4 0

3 years ago

Do you have to use significant figures in converting temperatures

schepotkina [342]

Not only in converting temperatures I think, we always use significant figures every time we want to make some experimental report using the exact data from our experiment. If that isn't experimental report ( some exercise/questions from your textbook) it's not necessary

4 0

3 years ago

Rubbing your hands together warms them by converting work into thermal energy. If a woman rubs her hands back and forth for a to

KATRIN_1 [288]

Answer:

0.178 °C

Explanation:

Given:

The frictional force, F = 48 N

Number of rubs, n = 18

Distance covered per rub, d = 7.16 cm = 0.0716 m

Total distance covered in 18 rubs, D = 0.0716 × 18 = 1.288 m

mass of the tissues warmed, m = 0.1 kg

Now,

Work done, W = Force × Displacement

W = 48 × 1.288 = 61.8624 J

Now,

Work done is the change in heat

W = ΔQ = 61.8624 J

also,

ΔQ = mCΔT

where, C is the specific heat

for human tissue, C = 3470 J/kg°C

thus,

61.8624 J = 0.1 × 3470 × ΔT

ΔT = 0.178 °C

Hence, the change in temperature is 0.178 °C

6 0

4 years ago

Where is the distance on a position time graph

S_A_V [24]

Answer:

The distance represents the difference of the first position and last position of the body.

Explanation:

For example, if y axis represents the position axis, and the first position is 3, second 9 we can see that the distance is a (positive) projection of one position into another. 9-3=6

Hope this helps.

4 0

3 years ago