What is a system in science this is my last question

Jermaine runs exactly 2 laps arounda 400 meter track. What is his distance traveled?

Particle A and particle B are held together with a compressed spring between them. When they are released, the spring pushes them apart and they then fly off in opposite directions, free of the spring. The mass of A is 2.

A 2200 kilogram car is accelerating at 3.4 m/s/s. what is the NET force?

Alex tested a substance that has a pH of 2. Which of the following could alex have tested? A) base B) salt C) water D) acid

some blind cave salamanders have eyes. how might this be evidence that cave salamanders evolved from sighted ancestors'

One watt is equal to which of these values? 1 joule/hour 1 joule-hour 1 joule/second 1 joule-second

What are some of the benefits of learned optimism that have been found in research? O A. Fewer health problems O O B. All of these C. Making more money O D. A lower divorce rate

Katie runs 6 km in 0.6 hour, then 5 km in 0.5 hour. Katie's average speed is __ per hour.

A derived unit is a combination of fundamental units. Which of the following is an example of a derived unit? a) centimeter (used to measure distance) b) gram (used to measure mass) c) cubic centimeter (used to measure volume)

Technician A says that a heater core leak can be the result of the coolant wearing a hole through the core. Technician B says that a core leak can be caused by chemical action eating a hole through the core. Who is correct?