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3 years ago

2. Which of the following wavelength properties would require a stopwatch to measure?

Physics

2 answers:

Ede4ka [16]3 years ago

4 0

Question : Which of the following wavelength properties would require a stopwatch to measure ?

A - wavelength

B- amplitude

C- frequency

D- height

MY ANSWER : C- FREQUENCY

MWAHHH LOVE - HAVE A RESTFUL NIGHT !

katovenus [111]3 years ago

3 0

Answer:

<u><em>A. wavelength</em></u>

Explanation:

The others are about sound and how high it is. That has nothing to do with time.

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How much power is needed to lift the 200-N object to a height of 4 m in 4 s?

Vitek1552 [10]

Answer: 2000 watts

Explanation:

Given that,

power = ?

Weight of object = 200-N

height = 4 m

Time = 4 s

Power is the rate of work done per unit time i.e Power is simply obtained by dividing work by time. Its unit is watts.

i.e Power = work / time

(since work = force x distance, and weight is the force acting on the object due to gravity)

Then, Power = (weight x distance) / time

Power = (200N x 4m) / 4s

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Power = 2000 watts

Thus, 2000 watts of power is needed to lift the object.

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4 years ago

The pressure in an automobile tire depends on the temperature of the air in the tire. When the air temperature is 25°C, the pres

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Answer:0.0704 kg

Explanation:

Given

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$T_2=50^{\circ}\approx 323 K$

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$P_2=337.44 KPa$

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Read 2 more answers

Suppose you run into a wall at 4.5 meters per second (about 10 mph). Let's say the wall brings you to a complete stop in 0.5 sec

STatiana [176]

Answer with Explanation:

We are given that

Initial velocity,u=4.5 m/s

Time=t =0.5 s

Final velocity=v=0m/s

We have to find the deceleration and estimate the force exerted by wall on you.

We know that

Acceleration= $\frac{v-u}{t}$

Using the formula

Acceleration= $a=\frac{0-4.5}{0.5}$

deceleration=a= $-9m/s^2$

We know that

Force =ma

Using the formula and suppose mass of my body=m=40 kg

The force exerted by wall on you

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3 years ago