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nignag [31]
3 years ago
8

Choose all the answers that apply. Power is calculated using ___.

Physics
1 answer:
antiseptic1488 [7]3 years ago
5 0

Time , Work, Horsepower

Explanation:

In General, Power is defined as rate of doing work in physics.

1.) By work and Time, we can calculate power as follows,

                 Power = Work done per unit Time

                              = Work done / time

2.) From Horsepower we can directly get the power.

Horsepower (hp) is a unit to measure the  power, or the rate at which work is done, usually in  the output of engines or motors. There are many  types of horsepower. Two common ways of defining horsepower is being used today are the mechanical horsepower (or imperial horsepower), which is about 745.7 watts, and the metric horsepower, which is approximately 735.5 watts.

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Two capacitors are connected in series and the combination is charged to 120V. There's 90.0V across one capacitor, whose capacit
IgorC [24]

Answer:

0.84μF

Explanation:

Charge is same through both the capacitors since they are in series. Total voltage is the sum of the voltages of the individual capacitors.. So voltage across the 2nd capacitor is 120- 90 =30 V.

Charge across first capacitor is Q = C₁V₁ = 90 x0.28 = 25.2μC

Therefore capacitance of 2nd capacitor =

C₂ = Q÷V₂ = 25.2÷30 = 0.84 μF

                                                     

4 0
3 years ago
Need help with number 1
Margarita [4]
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3 0
3 years ago
Can you answer These questions?
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8 0
3 years ago
A person slaps her leg with her hand, which results in her hand coming to rest in a time interval of 2.25 ms2.25 ms from an init
Aliun [14]

Answer:

The force is 3305.6 N.

Explanation:

Final velocity, v = 0

time, t = 2.25 ms

initial velocity, u = 4.25 m/s

mass, m = 1.75 kg

Let the acceleration is a.

Use first equation of motion.

v = u + a t

0 = 4.25 + a x 0.00225

a = - 1888.9 m/s^2

The force is

F = ma

F = 1.75 x 1888.9

F = 3305.6 N

4 0
3 years ago
1. An automobile traveling at 25 km/hour has kinetic energy equal to 1x 10^4J.
aleksandrvk [35]

Explanation:

It is given that,

Speed of an automobile is 25 km/h or 6.95 m/s

Kinetic energy of the automobile is 10^4\ J

(a) Kinetic energy of automobile s given by :

K=\dfrac{1}{2}mv^2\\\\m=\dfrac{2K}{v^2}\\\\m=\dfrac{2\times 10^4}{(6.95)^2}\\\\m=414\ kg

(b) If the velocity of the car is increased to 45 km/hour or 12.5 m/s, new kinetic energy becomes :

K=\dfrac{1}{2}\times 414\times (12.5)^2\\\\K=32343.75\ J

(c) If the velocity is increased to 80 km/hour, 22.23 m/s, So

K=\dfrac{1}{2}\times 414\times (22.23)^2\\\\K=102293.79\ J

Hence, this is the required solution.

3 0
4 years ago
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