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zhuklara [117]
3 years ago
13

A car starts from rest. 900 s later it is traveling at a velocity of 30 m/s north. Which of the following equations should you u

se to solve for the car's acceleration?
Physics
1 answer:
gogolik [260]3 years ago
4 0
(vx)f=(vx)i + a(t)
 since it starts from rest the initial velocity is zero so you can do some algebra and get your (a).
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In what direction does the medium move relative to the direction of the wave? Explain.
Artyom0805 [142]

As we can see that the boy is moving his hand up and down while producing the wave in the string.

Here we can see that the source of disturbance or source of wave here in this example is the boy who is holding the string at one end.

So here the motion of the hand of boy is representing the motion of medium molecules in the medium always

So here the disturbance of wave is travelling in the string to the right direction while if we see the direction of medium molecules then it is moving perpendicular to the string i.e. up and down

This type of wave is known as transverse waves in which medium molecules moves perpendicular to the direction of wave

8 0
3 years ago
A 12.0 μF capacitor is charged to a potential of 50.0 V and then discharged through a 265 Ω resistor. A)How long does the capaci
larisa [96]

(a) The time for the capacitor to loose half its charge is 2.2 ms.

(b) The time for the capacitor to loose half its energy is 1.59 ms.

<h3>Time taken to loose half of its charge</h3>

q(t) = q₀e-^(t/RC)

q(t)/q₀ = e-^(t/RC)

0.5q₀/q₀ = e-^(t/RC)

0.5 = e-^(t/RC)

1/2 =  e-^(t/RC)

t/RC = ln(2)

t = RC x ln(2)

t = (12 x 10⁻⁶ x 265) x ln(2)

t = 2.2 x 10⁻³ s

t = 2.2 ms

<h3>Time taken to loose half of its stored energy</h3>

U(t) = Ue-^(t/RC)

U = ¹/₂Q²/C

(Ue-^(t/RC))²/2C = Q₀²/2Ce

e^(2t/RC) = e

2t/RC = 1

t = RC/2

t = (265 x 12 x 10⁻⁶)/2

t = 1.59 x 10⁻³ s

t = 1.59 ms

Thus, the time for the capacitor to loose half its charge is 2.2 ms and the time for the capacitor to loose half its energy is 1.59 ms.

Learn more about energy stored in capacitor here: brainly.com/question/14811408

#SPJ1

6 0
2 years ago
Noah drops a rock with a density of 1.73 g/cm3 into a pond. Will the rock float or sink? Explain your answer
stealth61 [152]

Answer:

Sink

Explanation:

Water has a density of 1 g/cm³.  Since the density of the rock is greater than the density of water, the rock will sink.

4 0
3 years ago
Read 2 more answers
The weight of a 100 N laser printer is spread over 0.5m2. What is the pressure it exerts?
Marizza181 [45]

The answer is b brainlistt plz

5 0
4 years ago
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Sally accelerates a 250 kg cart at 3 m/s/s. What must be the net force?
Vlad1618 [11]
750 N is what I got...
7 0
3 years ago
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