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Andreyy89
3 years ago
7

Drop your username for whatever socials for a follow FREE 30 POINTS

Physics
2 answers:
Inga [223]3 years ago
8 0

Answer:

1233

Explanation:

PIT_PIT [208]3 years ago
7 0

Answer:

olaosebikan faruk...fb

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The voltage across a 5-uF capacitor is: v (t )equals 10 cos open parentheses 6000 t close parentheses space straight V. What is
mamaluj [8]

Answer:

- 0.3sin6000t A

Explanation:

Voltage, v = 10 cos 6000t V

Capacitance = 5-uF

Current flowing through, i(t)

i(t) = c * d/dt (V)

c = 5-uF = 5 * 10^-6 F

i(t) = (5 * 10^-6) * d/dt(10 cos 6000t)

d/dt(10 cos 6000t) = (10 * 6000) * (-sin 6000t)

Hence,

i(t) = (5*10^-6) * (10*6000) * (-sin 6000t)

i(t) = 5*10^-6 * 6*10^4 * - sin6000t

i(t) = 30 * 10^-2 * - sin6000t

i(t) = 0.3*-sin6000t

i(t) = - 0.3sin6000t Ampere

4 0
3 years ago
Which argument(s) for the increasing use of solar energy is/are valid? I. Solar cells are becoming cheaper and increasingly more
Tanya [424]

Answer:

The correct one is (III)

Explanation: Limited and uncertain supply and the increasing requirements for pollution control are raising the cost of using fossil fuels.

This is because fossil fuels emit green house gases that are causing global warming. As a result more awareness have been drawn towards the harmful use of fossil fuels, and international bodies are starting to form regulations on the use of fossil fuels. These above reasons has made fossil fuels though abundant, very expensive to use.

This make the usage of greener sources of energy like solar energy desirable. The only challenge solar is facing is on the area of efficiency, but scientists are constantly researching to make it more efficient.

5 0
3 years ago
If the position of a particle on the x-axis at time t is −5t2, then the average velocity of the particle for 0 ≤ t ≤ 3 is
Drupady [299]

Answer:

v = 15 m / s

Explanation:

In this exercise we are given the position function

          x = 5 t²

and we are asked for the average velocity in an interval between t = 0 and t= 3 s, which is defined by the displacement between the time interval

          v= \frac{v_{f} - v_{o} }{t_{f} - t_{o} }

let's look for the displacements

        t = 0     x₀ = 0 m

        t = 3     x_{f} = 5 3 2

                     x_{f} = 45 m

 

we substitute

           v = \frac{45 -0}{3 - 0}

           v = 15 m / s

3 0
3 years ago
Is Mia right and did you show a lot of work?​
mylen [45]

Answer:

Mia is correct, but did not show a lot of work.

Explanation:

Mia must explain her answer and give reasoning by using what knowledge she has on the subject.

3 0
3 years ago
A toy car is given a quick push so that it moves up an inclined ramp. After it is released, it moves up, reaches its highest poi
Alexeev081 [22]

Answer:

7. Net constant force down the ramp

Explanation:

After the car is released and starts moving up the ramp, the only force that is applied on the car is weight because of the gravity, we were told that the friction force is neglected. the force because of the weight is given by:

F=m*g*sin(\theta)

where θ is the angle of the ramp.

as you can see those values won't change, so the force remains constant down the ramp.

4 0
3 years ago
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