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3 years ago

4.

Physics

1 answer:

k0ka [10]3 years ago

5 0

Magnitude is the absolute max velocity a person can reach while falling ⇒ answer D

Explanation:

Terminal velocity is the maximum velocity attainable by an object

as it falls

An object dropped from rest will increase its speed until it reaches terminal velocity
terminal velocity is the point at which the velocity is no longer getting greater
At terminal velocity air resistance force and weight are equal so speed is constant

Example:

A falling person at low altitude will reach terminal velocity after about 12 seconds, falling some 450 m in that time. He will then maintain this speed without falling any faster

Absolute value means the non-negative value

That means the magnitude of the value without its direction

The answer of the question is:

Magnitude is the absolute max velocity a person can reach while falling

Learn more:

You can learn more about terminal velocity in brainly.com/question/7150553

#LearnwithBrainly

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Problem 1. Cylinders and a pendulum A uniform solid cylinder of radius r and mass m can roll inside a hollow cylinder of radius

Nataliya [291]

Answer:

The two answers are in the explanation

Explanation:

Please find the attached files for the solution

7 0

4 years ago

The friends are ready to try a problem. A battery has an emf of 12.0 V and an internal resistance of 0.05 Ω. Its terminals are c

Zanzabum

Answer:

Terminal voltage = 11.5 V

Power across load = 119.7 W

Power across internal resistance = 5.4 W

Power delivered by battery = 125.2 W

Explanation:

The current in the circuit is given by

$I=\dfrac{E}{R+r}$

where E is the emf of the battery, R us the load resistance and r is the internal resistance.

$I=\dfrac{12}{1.1+0.05} = 10.43 \text{ A}$

The terminal voltage is the potential difference across the load resistor.

V = I × R = 10.43 A × 1.1 Ω = 11.5 V

The power across any resistance is given by $I^2R$

For the load resistor,

$P_L=10.43^2\times1.1 = 119.7 \text{ W}$

For the internal resistance,

$P_r=10.43^2\times0.05= 5.4\text{ W}$

The power delivered by the battery is

$P = P_L + P_r = 119.7 + 5.4 = 124.1 \text{ W}$

This could also be found by

$P = IE = 10.34\times12 = 125.2 \text{ W}$

The discrepancy in both answers is due to the approximations. The second answer is better.

4 0

4 years ago

I need to speak with zuka

Alex787 [66]

Answer:

DMs are not accessible anymore. I assume Zuka is a staff member? the only way to talk to a staff member anymore is to report something, but even then, the probably won't even look at what they're deleting :/

May I have brainliest please? :)

3 0

3 years ago

Calculate the energy and power required for a student to bike their way to college from home. The student bikes from home for 0.

gregori [183]

Answer:

Check the explanation

Explanation:

To solve the problem, we need to analyze all forces acting on a bicycle individually. In question, student bikes on flat terrain so gravity force doesn't affect the road load. This is the case of uniform acceleration and deceleration so need to calculate average velocity to find Air resistance.

Kindly check the attached images below to see the step by step explanation to the question above.

8 0

3 years ago

a brand of a lightbulb has a power of 55w and an efficiency of 1.6% how much power is wasted as heat by this lightbulb

Maru [420]

98.4% of the power turns into heat.

If the bulb consumes 55 watts,
then it "wastes"

(0.984) x (55w) = 54.12 watts

5 0

3 years ago