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sasho [114]
4 years ago
13

12. According to Aristotle, a rock falls faster in water (more dense) than air (less dense).

Physics
2 answers:
belka [17]4 years ago
8 0

Answer:

False

Explanation:

It's false. When a rock falls in the water, it experiences the upthrust force which is much greater than that of air resistance in the air.

Jet001 [13]4 years ago
3 0

Answer:

false

Explanation:

took the test and got it right

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When light generated by a lamp in a light microscope passes into a lens, the speed of the light _______ because the glass lens h
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Answer:

the answer is slows and greater

Hopes it helps!

6 0
3 years ago
Determine the field strength, E, experienced by a test charge, q, if a charge of 7.0 × 10-5 coulombs is placed on q and a force
kkurt [141]
Formula for feild strength= F/q
q=7.0^10-5 coulombs
F=5.2 N
E=5.2 / 7.0^10-5
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7 0
3 years ago
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A 120 V potential difference is applied to a space heater that dissipates 674 W during operation. (a) What is its resistance dur
Annette [7]

Answer:

(a) 21.36 ohms

(b) 5.62 A

Explanation:

Parameters given:

Potential difference, V = 120 V

Power, P = 674 W

(a) Power is given as:

P = V²/R

Where R is resistance

=> R = V²/P

R = 120²/674

R = 14400/674

R = 21.36 ohms

(b) Power is also given as:

P = I*V

Where I = Current (time rate of flow of Electric charge)

=> I = P/V

I = 674/120

I = 5.62 A

6 0
3 years ago
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A dentist’s drill starts from rest. After 4.28 s of constant angular acceleration it turns at a rate of 28940 rev/min. Find the
mylen [45]

Answer:

Angular acceleration, is 708.07\ rad/s^2

Explanation:

Given that,

Initial speed of the drill, \omega_i=0

After 4.28 s of constant angular acceleration it turns at a rate of 28940 rev/min, final angular speed, \omega_f=28940\ rev/min=3030.58\ rad/s

We need to find the drill’s angular acceleration. It is given by the rate of change of angular velocity.

\alpha =\dfrac{\omega_f}{t}\\\\\alpha =\dfrac{3030.58\ rad/s}{4.28\ s}\\\\\alpha =708.07\ rad/s^2

So, the drill's angular acceleration is 708.07\ rad/s^2.

4 0
3 years ago
In this ecosystem, squirrels find and eat acorns from trees. What would happen to the balance of the ecosystem if populations of
Marizza181 [45]

<em><u>Answer</u></em>

The answer would be B.

7 0
4 years ago
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