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qwelly [4]
3 years ago
10

Which tool would you use to measure how long it takes a toy car to go down a ramp?

Physics
2 answers:
Arturiano [62]3 years ago
7 0

Answer:

Option C only measures time, option C is the correct answer.

Explanation:

Here we need to find which tool would you use to measure how long it takes a toy car to go down a ramp.

Here the unknown is time.

In the given options let us find what they measures.

  a) Ruler - Measures distance

  b) Scale - Measures distance

  c) Stopwatch - Measures time

  d) Meter stick - Measures distance

So option C only measures time, option C is the correct answer.

Ratling [72]3 years ago
4 0
The answer will be C, a stopwatch :)
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To determine the distance of the light that has traveled given the time it takes to travel that distance, we need a relation that would relate time with distance. In any case, it would be the speed of the motion or specifically the speed of light that is travelling which is given as 3x10^8 meters per second. So, we simply multiply the time to the speed. Before doing so, we need to remember that the units should be homogeneous. We do as follows:

distance = 3x10^8 m/s ( 8.3 min ) ( 60 s / 1 min ) = 1.494x10^11 m

Since we are asked for the distance to be in kilometers, we convert

distance = 1.494x10^11 m ( 1 km / 1000 m) = 149400000 km
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3 years ago
Water is different from other substances because:a it is more dense as a solid than a liquidb it is less dense as a solid than l
alexgriva [62]
B is correct. Ever wondered why ice floats in water?
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A converging lens of focal length 20 cm is used to form a real image 1.0 m away from the lens. How far from the lens is the obje
Galina-37 [17]

Answer:

0.25 m

Explanation:

We can solve the problem by using the lens equation:

\frac{1}{f}=\frac{1}{p}+\frac{1}{q}

where

f is the focal length

p is the distance of the object from the lens

q is the distance of the image from the lens

In this problem, we have

f = +20 cm=+0.20 m (the focal length is positive for a converging lens)

q = +1.0 m (the image distance is positive for a real image)

Solving the equation for p, we find

\frac{1}{p}=\frac{1}{f}-\frac{1}{q}=\frac{1}{0.20 m}-\frac{1}{1 m}=4 m^{-1}\\p=\frac{1}{4 m^{-1}}=0.25 m

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3 years ago
How much of Earth's surface is dry, ice-free land? *
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Answer:

Less than a quarter of Earth's surfaces are dry, ice free lands

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2 years ago
The points plotted on a graph represent the actual data recorded by an experiment.
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Read 2 more answers
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