Exam 8: Time and Time-Related Parameters

The speed of sound in air is approximately $340 ~ { \mathrm { m } } / \mathrm { s } \text {. }$ .The speed of light in air is approximately $3 { \times } 10 ^ { 8 } \mathrm {~m} / \mathrm { s }$ .If a lightning strike occurs 3 km away, how much time elapses before you hear the thunder?

A car starts from rest and 5 seconds later it is going $20 \mathrm {~m} / \mathrm { s } .$ .What is the car's average acceleration? a. $1.25 \mathrm {~m} / \mathrm { s } ^ { 2 }$ b. $4 \mathrm {~m} / \mathrm { s } ^ { 2 }$ c. $5 \mathrm {~m} / \mathrm { s } ^ { 2 }$ d. $20 \mathrm {~m} / \mathrm { s } ^ { 2 }$

A car starting from rest has a constant acceleration of 4 meters per second per second.How fast will it be going in 5 seconds? a. $1.25 \mathrm {~m} / \mathrm { s }$ b. $4 \mathrm {~m} / \mathrm { s }$ c. $5 \mathrm {~m} / \mathrm { s }$ d. $20 \mathrm {~m} / \mathrm { s }$

Time is a fundamental dimension.

A car starting from rest has a constant acceleration of 4 meters per second per second.How long will it take to reach a speed of $20 \mathrm {~m} / \mathrm { s }$ ?

If you pull a pendulum back and let it go, the time required for it to return to approximately the same place from which it was released is called

A slightly eccentric engineering professor rides a motorcycle whose front wheel has a diameter of $60 \mathrm {~cm}$ .While riding the motorcycle he notices that the front wheel is rotating at 220 Rpm)How fast is the motorcycle going?

The "pitch" of a musical note is most closely associated with a sound wave's

While in the stands at a soccer game you notice a player kick a soccer ball.If the player is $300 \mathrm {~m}$ away from you when he kicks the ball, how much time transpires between the kick and your visual perception of the kick? (The speed of light is approximately $\left. 3 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } \right)$

The frequency of "concert A" on a typical musical instrument is $440 \mathrm {~Hz}$ .What is the time for one complete oscillation?

While in the stands at a soccer game you notice a player kick a soccer ball.If the player is $300 \mathrm {~m}$ away from you when he kicks the ball, how long does it take the sound of the "kick" to reach your ears? Assume the speed in air is $340 \mathrm {~m} / \mathrm { s } .$ a. $1 / 2 ~\mathrm { sec }$ b. $5 / 8 ~\mathrm { sec }$ c. $3 / 4 ~\mathrm { sec }$ d. $7 / 8 ~\mathrm { sec }$

Comparing average velocity and instantaneous velocity,

A car traveling at constant speed as it rounds a curve is not accelerating.

While filling up your car with gasoline, you notice that it takes 90 seconds to dispense 15 liters of gasoline through the 2.5-centimeter diameter hose.What is the average speed, in meter Per second, of the gasoline inside the hose?

You are at a large outdoor concert, seated 300 meters from the speaker system.The concert is also being simulcast live via satellite.A friend of yours is listening to the broadcast from a Total of $5000 \mathrm {~km}$ away (distance to-and-from the satellite).Who hears the concert first?

The speed of sound in air is approximately $340 \mathrm {~m} / \mathrm { s } .$ .The speed of light in air is approximately $3 ^ { \times } 10 ^ { 8 } \mathrm {~m} / \mathrm { s }$ If 8.8 seconds elapses between seeing a lightning strike and hearing the thunder, how far away was the lightning strike?

A car travels along a certain road at an average speed of 60 kmph and returns along the same road at an average speed of 20 kmph.Calculate the average speed for the round trip.

The translational speed of a motorcycle is 20 mph.What is the rotational speed of the $63.5 -$ cm-diameter front wheel?

Considering the equation $v = r \omega$ , explain why a tennis racquet moves much faster than your hand when you hit a tennis ball.

Period and frequency mean the same thing.