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Juliette [100K]
3 years ago
8

3. | Amanda has just entered an elevator. The elevator rises and

Physics
1 answer:
rjkz [21]3 years ago
7 0

Answer:

The speed of elevator fast and slows down shows through the diagram.

Explanation:

Given that,

Amanda has just entered an elevator. The elevator rises and  stops at the third floor.

Let us consider the elevator at rest then the speed will be zero.

When elevator start from rest then the speed increases with constant acceleration and near the third floor it slow down with constant deceleration and finally becomes at rest at third floor.

We need to draw the diagram distance and time

Using given data,

First, the displacement A to B will be increases fastly and B to C the displacement increases slowly slowly.

Hence, The speed of elevator fast and slows down shows through the diagram.

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Find the time t2 that it would take the charge of the capacitor to reach 99.99% of its maximum value given that r=12.0ω and c=50
defon

Answer:

Explanation:

Given that, .

R = 12 ohms

C = 500μf.

Time t =? When the charge reaches 99.99% of maximum

The charge on a RC circuit is given as

A discharging circuit

Q = Qo•exp(-t/RC)

Where RC is the time constant

τ = RC = 12 × 500 ×10^-6

τ = 0.006 sec

The maximum charge is Qo,

Therefore Q = 99.99% of Qo

Then, Q = 99.99/100 × Qo

Q = 0.9999Qo

So, substituting this into the equation above

Q = Qo•exp(-t/RC)

0.9999Qo = Qo•exp(-t / 0.006)

Divide both side by Qo

0.9999 = exp(-t / 0.006)

Take In of both sodes

In(0.9999) = In(exp(-t / 0.006))

-1 × 10^-4 = -t / 0.006

t = -1 × 10^-4 × - 0.006

t = 6 × 10^-7 second

So it will take 6 × 10^-7 a for charge to reached 99.99% of it's maximum charge

8 0
3 years ago
10x2poooop11111111qq64
yulyashka [42]

Answer:

10×2=20

10×2÷64=??

I am not sure what you are trying to say...

7 0
3 years ago
Read 2 more answers
What impulse must be applied to a 25.0-kg cart to cause a velocity change<br> of 12.0 m/s?
klio [65]

Answer:

Impulse of force = 300Ns

Explanation:

Given the following data;

Mass = 25kg

Change in velocity = 12m/s

To find the impulse;

Impulse is given by the formula;

Impulse \; of \; force = mass * change \; in \; velocity

Substituting into the equation, we have;

Impulse \; of \; force = 25 * 12

Impulse of force = 300Ns

8 0
3 years ago
A 6.00 kg object is lifted vertically through a distance of 5.25 m by a light string under a tension of 80.0 N. Find: (2 marks)
jeka57 [31]

Explanation:

It is given that,

Mas of the object, m = 6 kg

It is lifted through a distance, h = 5.25 m

Tension in the string, T = 80 N

(a) By considering the free body diagram of the object, the forces can be equated as :

T-mg=ma

a=\dfrac{T-mg}{m}

a=\dfrac{80-6\times 9.8}{6}

a=3.33\ m/s^2

Work done by tension, W_t=F\times h

W_t=80\times 5.25

W_t=420\ J

(b) Work done by gravity, W_g=mgh

W_g=6\times 9.8\times 5.25

W_g=308.7\ J

(c) Let v is the final speed of the object and u = 0

v=\sqrt{2ah}

v=\sqrt{2\times 3.33\times 5.25}

v = 5.91 m/s

Hence, this is the required solution.

7 0
4 years ago
An overabundance of ________ is linked to schizophrenia and may be the cause of delusions and hallucinations.
erik [133]

Answer:

Dopamine

Explanation:

schizophrenia is caused by an overactive dopamine system in the brain

3 0
4 years ago
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