1. Identify the force acting as the centripetal force when a car circulate
around a flat circular track.
O Friction
Gravitation
Normal
O Tension
2. Identify the force acting as the
centripetal force when a bucket is tied
to a string and swung around in a
circle over your head.
O Friction
Gravitation
Normal
Tension
3. Identify the force acting as the
centripetal force when the earth
orbits the sun
O Friction
Gravitation
Normal
Tension
4. Identify the force acting as the
centripetal force when a matchbox
car drives around a loop-the-loop on
its race car track

Modern physics a photon emitted from an excited hydrogen atom has an energy of 3.02 electron volts. which electron energy-level transition would produce this photon? a. n=1 to n=6 b. n=2 to n=6 c. n=6 to n=1 d. n=6 to n=2 i chose b but the correct answer is d can someone tell me why? and what's the difference?

While studying chemical reactions and conservation of matter, sarah's class conducted a variety of experiments. sarah and her lab partner found the mass of a wax candle and placed the candle in a flask. the students lit the candle and let it burn to completion. all that was left was wax and charred candle wick. per their teacher's instructions, the students found the mass of the products. their data can be seen in the data table. formulate a hypothesis the students could test to explain why the experiment did not support the law of conservation of matter. a) the students could repeat the experiment using different candles; there might have been a flaw in the candle. b) the experiment should be repeatable. the students should run several trials and then take an average of the after mass in each trial. c) the students should have someone in the class check their measurement skills as they repeat the experiment. they may have made an error using the balance. d) the students should burn the candle in a container that has some type of lid so that any gas that is a product of the reaction can be contained and massed. submit

Atelevision set that has been running for a while heats up even the air around it. which two laws of thermodynamics could be used to analyze this scenario