Meg runs a 10km race in 45 minutes (0.75 hours). What was her speed in kilometers per hour?

a. 22 km/hr

b. 7.5 km/hr

c. 4.5 km/hr

d. 13 km/hr

What happens when the temperature of a substance is slightly decreased? A) the atoms within the substance move more rapidly. B) the atoms within the substance stop moving. C) the atoms within the substance move more slowly.

Which is a part of a vacuum? a) inclined plane b) block and tackle c) wedge d) lever

Crystal can ride her bike 10 miles in 2.1 hours. What is her velocity

A series circuit has a 100-Ω resistor, 4.00-mH inductor and a 0.100-μF capacitor connected across a 120-V rms ac source at the resonance frequency. What is the power dissipated by the circuit

A hurricane sweeps across the ocean and damages the houses of people living along the coast. Which of these does not play any role in this interaction? air water glaciers living things

Two copper wires with different diameters are joined end to end. If a current flows in the wire combination, what happens to electrons when they move from the larger-diameter wire into the smaller-diameter wire?

A baseball player is warming up and tosses a ball straight up into the air. The ball travels up until it reaches some maximum height, and then falls back down to the player/'s hand.

Volume can be measured in liters or cubic meters. a. T b. F

A spring with a spring constant of 1200 N/m has a 55-g ball at its end. The energy of the system is 5.5J. What is the amplitude of vibration?

Force F1 acts on a particle and does work W1. Force F2 acts simultaneously on the particle and does work W2. The speed of the particle does not change. Which one of the following must be true? a. W1 is zero, and W2 is positiveb. W1 = - W2c.