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bulgar [2K]
3 years ago
5

A car starts from rest and accelerates for 5.2 s with an acceleration of 2.8 m/s 2 . How far does it travel? Answer in units of

m.
Physics
1 answer:
Mumz [18]3 years ago
5 0
The final velocity is 5.2^2. The initial velocity is 0 . You are using Kinematic equation 3. (V^2=Vo^2+2a(x)) . (5.2^2=2(2.8)x)
27.04=5.6x
27.04/5.6=5.6/5.6x
4.83=x
The answer is 4.83m:)
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Three resistors, A, B, and C, are connected in parallel and attached to a battery, with the resistance of A being the smallest a
FromTheMoon [43]

Answer:

Resistor A

Explanation:

Resistors A, B and C are connected in parallel to a battery of voltage represented by V.

Since they are in parallel, the same voltage, V, passes across the three of them.

And from Ohm's law, the voltage (V) through a resistor is the product of the current (I) flowing through it and the resistance (R) of the resistor. i.e

V = I x R

=> I = \frac{V}{R}

Therefore, assuming the values of the resistances of resistors A, B and C are A, B and C respectively,

(i) the current, I_{A} through A is

I_{A} = \frac{V}{A}

(ii) the current, I_{B} through B is

I_{B} = \frac{V}{B}

(iii) the current, I_{C} through C is

I_{C} = \frac{V}{C}

From the foregoing, it can be deduced that the current is inversely proportional to the resistance. Therefore, the higher the resistance, the lower the current. Consequential of this, the resistor that carries the highest current is the one with the smallest resistance, which is A

5 0
3 years ago
A shuttle bus slows down with an average acceleration of -2.4 m/s2. How long does it
olganol [36]

Answer:

\boxed {\boxed {\sf 3.75 \ seconds }}

Explanation:

Average acceleration is found by dividing the change in acceleration by the time.

a=\frac{ v_f-v_i}{t}

The shuttle bus has an acceleration of -2.4 meters per square second. It slows from 9.0 meters per second to rest, or 0 meters per second. Therefore:

a= -2.4 \ m/s^2 \\v_f= 0 \ m/s \\v_i= 9 \ m/s

Substitute the values into the formula.

-2.4 \ m/s^2=\frac{0 \ m/s - 9 \ m/s}{t }

Solve the numerator.

-2.4 \ m/s^2 = \frac{-9 \ m/s}{t}

We want to solve for t, the time. We have to isolate the variable. Let's cross multiply.

\frac{-2.4 \ m/s^2}{1} = \frac{-9 \ m/s}{t}

-9 \ m/s *1= -2.4 \ m/s^2 *t

-9 \ m/s=-2.4 m/s^2*t

t is being multiplied by -2.4. The inverse of multiplication is division, so divide both sides by -2.4

\frac{-9 \ m/s }{-2.4 \ m/s^2} =\frac{ -2.4 \ m/s^2*t}{-2.4 \ m/s^2}

\frac{-9 \ m/s }{-2.4 \ m/s^2} =t

3.75 \ s=t

It takes <u>3.75 seconds.</u>

4 0
3 years ago
GIZMO
CaHeK987 [17]
It is A or D but I believe A
5 0
3 years ago
What is the effect of load resistor on ripple factor
Zolol [24]
<span>ripple factor can be reduced by increasing the value of the load resistor (which means reducing the load of the circuit)</span>
7 0
3 years ago
A swimming pool is 4.0 m in depth; a swimmer at this depth feels discomfort in the ear. Calculate the net force on a 0.50-cm-dia
Mashcka [7]

The net force on a 0.50-cm-diameter eardrum is mathematically given as

F= 0.76969 N

<h3>What is the net force on a 0.50-cm-diameter eardrum?</h3>

Generally, the equation for Pressure is  mathematically given as

P = ρgh

Therefore

P= 1000*9.8*4

P= 39200 Pa

Where

A= pi*(0.005/2)^2

Generally, the equation for Net force is  mathematically given as

F = PA

F= 39200 *( pi*(0.005/2)^2)

F= 0.76969 N

In conclusion, The net force is

F= 0.76969 N

Read more about Pressure

#SPJ1

5 0
2 years ago
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