Which of the following machines most likely has the greatest efficiency?

a

A. Airplane

B. Automobile

C. Bicycle

D. Human body

a car travelled 60 km west in 1.33 h along straigt line, then returned back east for 40 km in 0.67 h. its average velocity

Whats the difference between ionization energy and excitation energy?

Describe a life cycle of a star

What is the magnitude of the instantaneous velocity (speed) of a freely falling object 13 s after it is released from a position of rest? Consider the acceleration of gravity to be 10 m/s2.

An astronaut weighs 104N on the moon and the strength of gravity is 1.16N/kg What is her mass on the moon What is weight on Earth? (g=10N/kg) What would she weigh on Mars? g=3.7N/kg) Also, I need to show work for all these ...

Which practice fits the definition of conservation? using more of a mineral resource than needed not using a necessary mineral resource at all mining a mineral without regard to the surface soil and vegetation above it recycling cans that contain a

The word family implies that the elements in a family have like properties. What property do the elements of the noble gas family all share?

What is the energy of an object because of its potential and kinetic energies? A.) chemical energy B.) electrical energy C.) nuclear energy D.) mechanical energy

If the volume of a hot air balloon remains constant, what happens as the temperature of the air inside the balloon increases?

What is the correct formula for electrical power? l