3 years ago

I need this quick!!!! In middle of a quiz

Physics

1 answer:

RUDIKE [14]3 years ago

6 0

Inelastic would be the answer to this question

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3. Nearsighted people can undergo a medical procedure called keratotomy to produce normal (or at least more-normal) vision. In t

Mademuasel [1]

Answer:

P= -1.83D

Explanation:

Given,

u=-6 m

v=-50 cm = - 0.5 m

the power of the lens

P = 1/f = 1/v = 1/u

P = 1/ -0.50 + 1/6

P = -1.83D

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3 years ago

Examine the scenario.

frutty [35]

I Think The answer is d I hope it helps My friend Message Me if I’m wrong and I’ll change My answer and fix it for you

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3 years ago

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The term used to describe the quantity of matter that a body possesses is:

barxatty [35]

The term used to describe the quantity of matter that a body possesses is mass.

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3 years ago

A police car on the side of the road (at rest) uses a radar gun to catch speeders as they approach it. The frequency the radar g

oee [108]

Answer:

$\Delta f = 1.49 \times 10^9 Hz$

Explanation:

Apparent frequency that is received to the speeder is given as

$f_1 = f_0\frac{v + v_o}{v}$

$f_1 = (8 \times 10^9)\frac{340 + v_o}{340}$

here we know that

$v_o = 65 mph = 29 m/s$

now we have

$f_1 = (8 \times 10^9)\frac{340 + 29}{340}$

$f_1 = 8.68 \times 10^9 Hz$

now the frequency that is received back from the speeder is given as

$f_2 = f_1\frac{v}{v- v_o}$

$f_2 = (8.68 \times 10^9}\frac{340}{340 - 29}$

$f_2 = 9.49 \times 10^9 Hz$

So difference is the frequency is given as

$\Delta f = 9.49 \times 10^9 - 8 \times 10^9$

$\Delta f = 1.49 \times 10^9 Hz$

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3 years ago

When an earthquake occurs, two types of sound waves are generated and travel through the earth. The primary, or P, wave has a sp

Zielflug [23.3K]

Answer: $d=7.94\times 10^5\ m$

Explanation:

Given

Speed of Primary wave $v_1=8\ km/s$

Speed of secondary wave $v_2=4.5\ km/s$

difference in timing of two waves are $77.2\ s$

Suppose both travel a distance of d km then

$t_1=\frac{d}{8}\quad \ldots (i)$

$t_2=\frac{d}{4.5}\quad \ldots (ii)$

Subtract (ii) from (i)

$\frac{d}{4.5}-\frac{d}{8}=77.2$

$d[\frac{1}{4.5}-\frac{1}{8}]=77.2$

$d[0.0972]=77.2$

$d=794.23\ km$

$d=7.94\times 10^5\ m$

7 0

3 years ago