Engine 1 takes in 100 J of heat from a hot reservoir and does 20 J of work. Engine 2 takes in 600 J of heat from
the hot reservoir and does 60 J of work. Is the efficiency
of engine 1 greater than, less than or equal to the
efficiency of engine 2? Explain.

What are atoms of the same element with varying number of neutrons

An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?

The electric potential v is constant everywhere within a certain region of space. which statement below is true? the choices are: the electric field is also constant (but not zero) within the region. a charged particle placed within the region will experience an electric force. the electric field is zero everywhere within the region. the electric field varies from place to place within the region.