A car travels from Boston to Hartford in 4 hours. The two cities are 240 kilometers apart. What was the average speed of the car during the trip?

A. 4 km/hour

B. 36 km/hour

C. 960 km/hour

D. 60 km/hour

A person jumps forward off the front of a stationary boat floating on a lake. Identify the reaction force in this case, between the person and the boat.

It takes a truck 3.56 seconds to slow down from 112km/h to 87.4km/h what is it's average acceleration?

What is the source of the electrical potentials recorded from the scalp of a human subject?

Consider two planets A and B. The mass of planet B is 0.012 times the mass of planet A and its radius is 0.3 times the radius of planet A. If the acceleration due to gravity at the planet A is 10 m/s2, calculate the corresponding value at planet B.

A material used for electrical wiring must have? A. low malleability B. high viscosity C. high conductivity

Which of the following elements is the most reactive? Beryllium Calcium Magnesium Barium

A flash of white light containing all the colors of the visible spectrum in air shines straight down on the surface of a pool.

A car accelerates uniformly from 0 to 15m/s in 5 s. Calculate acceleration.

Which device would a sleep researcher use to monitor a sleeping person's brain waves?

An experiment is performed to obtain the value of a physical property. If the true (i. e., correct) value of the property is 50 and the measured (i. e., experimental) value is 32, the percent error of the experimental result is: