What is the efficiency of a tractor that has a work output of 300j and a work input of 400j

Consider a solid cylinder disk rotating on an through its center. if the angular momentum of the disk increases, what can you conclude

What is the process called when the moon begins to fade from a full moon to the new moon?

Multiple Select Which of the following discoveries are attributed to Johannes Kepler? Select all that apply. The orbits of the planets are ellipses. The earth is round. Gravitational forces govern planetary motion.

Light bulb 1 operates with a filament temperature of 2800 K, whereas light bulb 2 has a filament temperature of 1700 K. Both filaments have the same emissivity, and both bulbs radiate the same power.

A horse has an acceleration of 2 m/s. of it starts from rest. how fast is it going after 1.7 seconds

What is the primary function of the small intestines

A nuclear power plant generates a total of 150mw of power and 45% of this power is wasted heat that is discharged on the cooling water of a river. the river flows at 660.43 gal/s and has an upstream temperature of 64.4 ⁰f.

The universe is believed to have been form from a very dense fireball billions of years ago.

What does the slope of the line on this velocity versus time graph represent? A. positive deceleration B. zero acceleration C. positive acceleration D. negative acceleration

Which of the following objects has the greatest kinetic energy? a baseball flying through the air at 90 miles per hour a baseball flying through the air at 45 miles per hour a baseball flying through the air at 20 miles per hour a baseball sitting