Which definition of speed (average speed, constant speed, instantaneous speed) did we use in this investigation? why?

If an object with an initial temperature of 300 k increases its temperature by 1°c every minute, by how many degrees fahrenheit will its temperature have increased in 10 minutes? (a) 6°f (b) 10°f (c) 18°f (d) 30°f

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire

Suppose you increase your walking speed from 7 m/s to 13 m/s in a period of 2 s. what is your acceleration?