Solenoids are often used to operate the starter switch in a car engine. When a car is turned on, electric charges flow through the solenoid. The magnetic field that the solenoid generates causes a switch to move and close. The closed switch starts the engine. What does this tell you about the material of the switch?

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

Sound travels slower in colder air that it does in warmer air. make a claim about the effect of air temperature on the speed of sound. support your claim with evidence

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?