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4 years ago

What is the frequency of a clock waveform whose period is 750 microseconds?

1 answer:

6 0

The frequency f of a wave is defined as the inverse of the period T:
$f= \frac{1}{T}$
The clock in the problem has a waveform with period $T=750 ms=0.750 s$ . Therefore, its frequency is
$f= \frac{1}{0.750 s}=1.33 Hz$

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Which statement describes the relationship of resistance and current ? Resistance is directly proportional to current because R=

joja [24]

Answer:resistance is inversely proportional to current.since r=v/I

Explanation:

resistance(r) is inversely proportional to current.

Since r=v/I

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4 years ago

Which is an example of something heated by conduction

hodyreva [135]

An example would be a pot on a stove. The radiation from the source of the heat (the stove) would make the handle hot by conduction from heat through contact.

Another example could be a metal spoon in a hot cup of coffee. The coffee itself is hot, but since the spoon is in the coffee and making contact, part of the spoon will become hot from the radiation of the source of heat (the hot coffee). Thus, conduction.

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3 years ago

A tennis ball with a speed of 11.3 m/s is moving perpendicular to a wall. after striking the wall, the ball rebounds in the oppo

Arlecino [84]

To calculate the average acceleration of the ball we use the formula,

$a= \frac{v_{f} -v_{i}}{t}$

Here, $v_{f}$ is the final velocity of the ball and $v_{i}$ is the initial velocity of the ball t is the time in contact with the wall.

Given $v_{i} = 11.3 m/s$ towards the wall and $v_{f} = 7.2207 m/s$

away from the wall and $t=0.00803 s$ .

Substituting these values in above formula , we get

$a=\frac{(-7.2207 m/s)-11.3 m/s}{0.00803 s}$

Here $v_{f}$ is negative because ball is moving away from the wall.

$a= - 2306 .4 \ m/s^{2}$

Therefore, average acceleration of the ball is $- 2306 .4 \ m/s^{2}$ (away from the wall).

4 0

4 years ago

A 2.6 kg rock is dropped from a height of 10 m. With what speed will it strike the ground. Ignore air resistance. Solve using co

timurjin [86]

Answer:

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3 years ago

give an example of how someone may be misjudged about their athletic ability due to diversity in sports (age,ethnicity,gender et

Ipatiy [6.2K]

Here is just a few:

1. white guys cant jump like black guys therefore white guys shouldn't play basketball
2. men are stronger than women so men should weight lift
3.football is a manly sport therefore woman should not play it

*hope this helps(these are just examples I am not expressing my beliefs

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4 years ago