In a machine, work output is less than work input because some energy is converted into thermal energy. true or false.

Which subatomic particles each have a positive electrical charge? a. protons b. neutrons c. electrons

A ball thrown horizontally with speed vi = 23.0 m/s travels a horizontal distance of d = 59.0 m before hitting the ground. from what height h was the ball thrown?

What is speed in science

10. A car moving at 18 m/s accelerates at - 2.5 m/s² as it approaches a stop sign. a. How long does it take the car to come to a complete stop? b. What distance does the car travel as it is breaking?

Why does the reading on hydrometer increase towards the bottom?

Regarding perspectives on abnormality, what is the common ground between the medical and psychoanalytic perspectives? a. Both view abnormal behaviors as symptoms of underlying problems. b.

The force in Newtons on a particle directed along the x-axis is given by F (x) = exp ( - (x/5) + 5) for x≥0 where x is in meters. The particle is constrained to move along the x-axis.

What are electromagnetic waves? what are its characteristics? how do we classify them?

A gas is collected from a radioactive material; upon inspection, the gas is identified as helium. The presence of the helium indicates the radioactive sample is most likely decaying by: A). alpha B). beta + C). beta - D). gamma

Is 30 minutes to nine the same as 30 minutes after 8 in life