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3 years ago

When designing an experiment how do you choose a system to investigate

1 answer:

4 0

You pick a system for which no control sample exists, so that no one can show that the alleged causal relationships you assert do not, in fact, lead to the phenomenon you claim to have observed.

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Which of the following is an example of an electromagnetic wave?

PtichkaEL [24]

Answer:

red light light is an electromagnetic wave thats whyy

hope it helped

Explanation:

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2 years ago

Urgent help for a physics exercise!

Zigmanuir [339]

Amplitude of wave is given as maximum displacement from mean position

So here amplitude is 1.25 cm

Wavelength is the length of the wave that it travels in one time period

From graph we can say the wavelength is given as 3cm

PART C)

Time period of wave is the time after which it repeats its shape

Speed of the wave = 21 cm/s

time period = wavelength / speed

$T = \frac{3}{21}$

$T = \frac{1}{7} s$

Now frequency is

$f = \frac{1}{T}$

$f = 7 Hz$

PART D)

Time period = \frac{1}{f}[/tex]

$T = 0.143 s$

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4 years ago

Can someone teach me how to do free fall in physics. A soccer ball is dropped from the top of a building. It takes 5.8 seconds t

castortr0y [4]

Answer:

H=gt^2 /2=(10)(5.8)^2=168.2 m

5 0

3 years ago

Please help with some/all questions on this worksheet

Roman55 [17]

A. Yes electricity is a fuel this is because protons are being displaced threw currents of electricity that are the used too charge a coil witch spins causing rotationional force And power too appropriate machine
B. Octane
C.one advantage is more power since octane is more combustable than electricity it makes gas or Diesel engines more powerful as too why there are no semi trucks being powered by electricity.
D. One disadvantage is effectively how well its fuel is spent gas is 69.78% less efficient

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2 years ago

Scanned with CamScanner

baherus [9]

The answer is c to take a pictures with the camera in the metal hall

8 0

3 years ago