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g100num [7]
4 years ago
12

How do instantaneous speed and average speed differ

Physics
1 answer:
Citrus2011 [14]4 years ago
6 0

Average speed is the speed averaged over a span of time. Usually the total distance covered divided by the total time span. Instantaneous speed would be the speed any any given instant within that span of time, measured with a realtime speedometer.

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What is the average velocity of a car that travels 450 km north in 9.0 hours?
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The average velocity of a car that travels 450 km north in 9.0 h is 5.0 x 10 km/h

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Planet with the Great Red Spot
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Answer: jupiter

Explanation:

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The two-second rule applies to any speed __________ A. in all weather conditions. B. in ideal weather and road conditions. C. in
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Answer:

The answer is A

Explanation:

A large risk of tailgating is the collision avoidance time being much less than the driver reaction time. Driving instructors advocate that drivers always use the "two-second rule" regardless of speed or the type of road. During adverse weather, downhill slopes, or hazardous conditions such as black ice, it is important to maintain an even greater distance.

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3 years ago
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How many turns are in its secondary coil, if its input voltage is 120 V and the primary coil has 210 turns
Tasya [4]

Complete Question

How many turns are in its secondary coil, if its input voltage is 120 V and the primary coil has 210 turns.

The output from the secondary coil is  12 V

Answer:

The value  is  N_s  =  21 \  turns

Explanation:

From the equation we are told that

   The input voltage is  V_{in}  = 120 \ V

   The number of turns of the primary coil is N_p =  210 \  turn

    The output from the secondary is V_o =  12V

From the transformer equation

   \frac{N_p}{V_{in}}  =\frac{N_s}{V_o}

Here N_s is the number of turns in the secondary coil

=> N_s  =  \frac{N_p}{V_{in}}  *  V_s

=>N_s  =  \frac{210}{120}  *  12

=>N_s  =  21 \  turns

4 0
4 years ago
While on a moving elevator during a certain perfod or time, Frank's apparent weight is 620 N. If Frank's mass is 70 kg, what is
MakcuM [25]

Answer:

0.94 m/s^2 downwards

Explanation:

m = 70 kg, m g = 70 x 9.8 = 686 N

R = 620 N

Let the acceleration be a, as the apparent weight decreases so the elevator is moving downwards with an acceleration a.

mg - R = ma

686 - 620 = 70 x a

a = 0.94 m/s^2

7 0
3 years ago
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