When Bob needs to send Alice a message with a digital signature, whose private key is used to encrypt the hash?

Two very quick questions! 1) If a pulley system with an actual mechanical advantage of 2 is used in lifting a 2,000 lb.

A plaintiff sued an auto manufacturer for negligence after a car accident involving the plaintiff's car that was made by the auto manufacturer.

An EM wave has a wavelength A 500 nm and a peak electric field Eo 100 i. The wave propagates along the z axis.

Distance and amount of charge are factors that determine which of the following quantities?

How much heat is givne out when 6.0g of water freezes at 0 degrees celcius the heat of fusion of water is 80.0 cal/g?

A flash of white light containing all the colors of the visible spectrum in air shines straight down on the surface of a pool.

A car accelerates uniformly from 0 to 15m/s in 5 s. Calculate acceleration.

Which device would a sleep researcher use to monitor a sleeping person's brain waves?

An experiment is performed to obtain the value of a physical property. If the true (i. e., correct) value of the property is 50 and the measured (i. e., experimental) value is 32, the percent error of the experimental result is:

White moths were found in huge numbers in the city of Birmingham. These moths could be easily camouflaged by the trees. Because of sudden industrial development, the trees in the city were covered with soot.