A delivery van drives for 30 minutes and travels 50 miles. The delivery van turns around and drives 20 miles in 15 minutes. The van waits at this location for 5 minutes. Turns around again and drives another 100 miles for 65 minutes.
What is the displacement?

Which of the following represents an upside-down image?

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples

How many neutrons does plutonium -196 with an atomic number of 78.