Students of different ages were given the same puzzle to assemble. The puzzle assembly time was measured. The puzzle is meant for ages 5-8. What's the hypothesis?

What caused Hurricane Sandy to weaken on October 30th and October 31st?

Which of these is an example of a mechanical wave? A. Light from a flashlight B. Police siren. C. Sunlight D. Microwaves used to heat food.

How will you define motion?

Stars only emit light within the visible spectrum of the electromagnetic spectrum. A. True B. False

How many 90-W, 120-V light bulbs can be connected to a 20-A, 120-V circuit without tripping the circuit breaker?

A bird has a kinetic energy of 3 J and a potential energy of 25 J. What is the mechanical energy of the bird?

Material A has a higher thermal conductivity than Material B. Which material will transfer energy by conduction faster?

an electrical iron box having power 400w is operated in 10hours. what will be the energy consumed by the device in commercial unit?

True or False: If your gas pedal jams, you should turn the key to lock to lock the steering wheel.

Pylon cables in the National Grid have some resistance. Power (watts) = Current2 (amperes) x Resistance (ohms) Looking at the power equation above, can you explain why transmitting electricity at a very high voltage is beneficial?