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3 years ago

What does the slope of a position time graph determine?

1 answer:

3 0

The slope of a position/time graph is the speed of the motion.
(The slope doesn't 'determine' the speed; it only displays it.)

The slope of a speed/time graph is the acceleration of the motion.

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Wire 1 has a resistance R1. Wire 2 is made of the same material, with length 1/2 as long and diameter 1/4. What is the resistanc

hodyreva [135]

-- reduce the length of a wire to 1/2 . . . cut the resistance in half

-- reduce the diameter to 1/4 . . . reduce the cross-section area by (1/4²) . . . increase the resistance by 16x .

-- R2 = (R1) · (1/2) · (16) = 8 · R1

5 0

2 years ago

State newtons second law of motion from the equation f: ma

ANEK [815]

Answer:

wut goes up must come down i dunno lol

Explanation:

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2 years ago

PLEASE HELP! thxssss<br>

Cerrena [4.2K]

Answer:

D is correct

Explanation:

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2 years ago

Copy and Complete the Sentence

max2010maxim [7]

Answer:

When something happens, energy is changed from one form into another.

Explanation:

correct me if I'm wrong

4 0

2 years ago

A portable x-ray unit has a step-up transformer. The 120 V input is transformed to the 100 kV output needed by the x-ray tube. T

slega [8]

Answer:

$N_s\approx41667 \hspace{3}lo ops$

Explanation:

In an ideal transformer, the ratio of the voltages is proportional to the ratio of the number of turns of the windings. In this way:

$\frac{V_p}{V_s} =\frac{N_p}{N_s} \\\\Where:\\\\V_p=Primary\hspace{3} Voltage\\V_s=V_p=Secondary\hspace{3} Voltage\\N_p=Number\hspace{3} of\hspace{3} Primary\hspace{3} Windings\\N_s=Number\hspace{3} of\hspace{3} Secondary\hspace{3} Windings$

In this case:

$V_p=120V\\V_s=100kV=100000V\\N_p=50$

Therefore, using the previous equation and the data provided, let's solve for $N_s$ :

$N_s=\frac{N_p V_s}{V_p} =\frac{(50)(100000)}{120} =\frac{125000}{3} \approx41667\hspace{3}loo ps$

Hence, the number of loops in the secondary is approximately 41667.

3 0

3 years ago