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3 years ago

Which of the following is an example of an indirect observation?

Physics

2 answers:

Ganezh [65]3 years ago

7 0

Answer:

Explanation:

The other two choices are exact. B is estimating and giving an indirect observation.

chubhunter [2.5K]3 years ago

7 0

b. scientist traps fish and

estimates the population of male and female fish based on the ratios of fish he trapped.

The key word is estimate. Estimate means that he gives a rough number. There aren't exactly that number of fish.

A. and C. are both exact numbers because the scientists manually count each one. This means these are direct observations, and therefore not the answer.

Hope this helped!

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Dana has a sports medal suspended by a long ribbon from her rearview mirror. as she accelerates onto the highway, she notices th

Dominik [7]

Refer to the diagram shown below.

m = the mass of the medal
T = the tension in the string
g = 9.8 m/s²

Part (a)
The inertial force, F, tends to move the medal away from the windshield when the vehicle accelerates to the right.

Answer: The medal leans away from the windshield.

Part (b)
For force balance,
T cos(15°) = mg
0.9659 T = 9.8m
T = 10.1457m N

Also,
F = Tsin(15°) = 10.1457m*0.2588 = 2.6257m N
The inertial force is equal to the accelerating force, therefore
the acceleration, a, is given by
(2.6257m N) = (m kg)*(a m/s²)
a = 2.6257 m/s²

Answer: 2.626 m/s²

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4 years ago

Which statement is true about the scientific method?

dsp73

Answer: A. It follows one prescribed sequence of steps.

Explanation:

A scientific method can be define as the procedure which is required to be followed so as to prove the cause of a scientific phenomena. The scientific method usually consist of steps of experimentation procedures which are performed under controlled conditions so as to avoid any error in the observation as well as in the results. The scientific method is necessary to relate the experimental conditions with the nature.

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4 years ago

What happens when the temperature of a substance decreases significantly?

Alexxx [7]

It all combines together and it freezes

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3 years ago

Pls help waves for physics

djverab [1.8K]

Answer:

b) 252 Hz or 260 Hz

c) 0.25 s

Explanation:

b) The frequency of the beats is 4 Hz, and one tuning fork has a frequency of 256 Hz. Therefore, the second tuning fork is either 4 Hz lower or 4 Hz higher.

f = 252 Hz or 260 Hz

c) Period is the inverse of frequency.

T = 1/f

T = 1 / (4 Hz)

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3 years ago

The spheres are connected by a uncharged teflon rod. what is the charge on the left sphere after the charged plastic rod touches

vodomira [7]

The charge on the left sphere negatively charged.

<h3 /><h3>What is charge?</h3>

Due to the physical property of electric charge, charged material experiences a force when it is subjected to an electromagnetic field. You might be electrically positive or negative. While similar charges repel one another, opposite charges attract.

In order for the neutral metal sphere and negatively charged metal rod to have the same potential, some negative charge must flow from the rod to the sphere in order for them to both have negative charges.

The sum of the negative charges in them would be equal to the initial negative charge in the rod since the entire charge is preserved.

to learn more about charge go to -

brainly.com/question/18102056

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2 years ago