Which pair of sentences is describing the same velocity? a)a car is parked. a car is moving in circles. b)a bus drives 40 miles per hour north. a truck drives 50 miles per hour north. c)a boy walks east at 6 kilometers per hour. a girl walks west at the same speed as the boy. d)valerie rides her bike south at 8 kilometers per hour. owen jogs south at 8 kilometers per hour.

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Why do different substances have diffrent properties

The starship enterprise is caught in a time warp and spock is forced to use the primitive techniques of the 20th century to determine the specific heat capacity of an unknown mineral. the 125-g sample was heated to 96.3°c and placed into a calorimeter containing 85.9 g of water at 20.0°c. the heat capacity of the calorimeter was 14.2 j/k. the final temperature in the calorimeter was 24.5°c. what is the specific heat capacity (in j/g°c) of the mineral? enter to 4 decimal places.