2 years ago

If the change in kinetic energy of a tennis ball hit by the racket

Physics

1 answer:

Marrrta [24]2 years ago

5 0

Answer: .36 m

Explanation:

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A 120 resistor a 60 ohm resistor and a 40 ohm resistor are connected in parallel to a 120 volt power source. what is the current

larisa [96]

Answer:

6 A

Explanation:

First of all, we need to calculate the equivalent resistance of the circuit. The three resistors are connected in parallel, so their equivalent resistance is given by:

$\frac{1}{R_T}=\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}=\frac{1}{120 \Omega}+\frac{1}{60 \Omega}+\frac{1}{40 \Omega}=\frac{3+2+1}{120 \Omega}=\frac{6}{120 \Omega}\\R_T = \frac{120}{6} \Omega$

And now we can use Ohm's law to find the current in the circuit:

$V=R_T II=\frac{V}{R_T}=\frac{120 V}{\frac{120}{6}\Omega}=6 A$

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3 years ago

Water is a compound because it A. cannot be broken down into simpler substances. B. always has two hydrogen atoms for each oxyge

hjlf

I'm almost positive it's b

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2 years ago

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Lin suffers from pain in her right wrist. Several doctors check her wrist regularly over a period of time. Doctors' notes and

FromTheMoon [43]

Answer:

Explanation:

They looked at her hand and made a formal conclusion from that

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3 years ago

Why is it important to warm up your muscles before a workout?

slava [35]

Answer: So that you don't have a cramp

Explanation: Muscles can cramp up if not stretched becuase it keeps the muscles flexable and strong and to maintain the range of motion a person has.

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What is capacitance?

WARRIOR [948]

capacitance of any given capacitor is given by the formula,

C=Q/V

where C=capacitance,Q= charge and V=voltage

therefore from the formula capacitance is charge per unit voltage.

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3 years ago