1. Mrs. Cavanaugh set a record by running 200m in 21.34s. What was her average speed? 2. What is the speed of a truck that travels 12 kilometers in 15 minutes?
13.33 m/s
3. A sprinter runs 100m in 10 seconds. Find the speed of the runner.
100/10 is 10 m/s
4. Sound travels at a speed of 330 meters per second. How long does it take for the sound of thunder to travel 30 meters?
5. Sound travels at a speed of 330m/s. If a lightning bolt strikes the ground 10km away from you, how long will it take for the sound to reach you?
6. A cyclist leaves home and rides east for a distance of 45km. She returns home on the same bike path and the entire trip takes 4 hours. What was the average speed of her trip?
7.A cyclist must travel 800 kilometers. How many hours will the trip take if the cyclist travels at an average speed of 16km/hr?
8. A wooden 64 cm3 block has a density of 0.20 g/cm3. What is its mass?
9.Find the density of butter if 272g occupies 312cm3.
10.Find the density of balsa wood if 171g occupies 4.65cm3.

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

the answer is a. the yacht traveled from the dock north to the 200-meter marker in the bay in less than 5 minutes, giving the passengers several more hours to fish.

im doing peak rn so sry if its wrong

1 the 4 is sig