Describe two forms of energy-efficient transportation.

What is the kinetic energy in joules of a 0.05. kg bullet traveling 310 m/s

What does it mean when work is positive? Velocity is greater than kinetic energy. Kinetic energy is greater than velocity. The environment did work on an object. An object did work on the environment.

Which one of the following bodies has only potential energy? a. A ball rolling downhill b. A cat sitting on the fence c. A dog running after a car d. A stone falling from a cliff

True or false: dimensional analysis can give you the numerical value of constants of proportionality that may appear in an algebric expression

Consider two waves X and Y traveling in the same medium. The two carry the same amount of energy per unit time, but X has one-seventh the amplitude of Y. What is the ratio of their wavelengths? (λY/λX=?)

What is a lenticular (S0) galaxy? A galaxy with a disk and central bulge like a spiral galaxy, but with no spiral arms A galaxy with a smooth brightness profile, lacking the central bulge and disk of a spiral galaxy A spiral galaxy with fuzzy and

Which process causes wells on land to become saline, making them unusable for drinking water? A. Erosion B. Echo sounding C. Eutrophication D. Groundwater infiltration

A farmer uses a tractor to pull a 150 kg bale of hay up a 15∘ incline to the barn at a steady 5.0 km/h. The coefficient of kinetic friction between the bale and the ramp is 0.40. Part A What is the tractor's power output?

Identify the conditions for an elastic collision in a closed system. Check all that apply. Energy is conserved. Velocities may change. Momentum is conserved. Kinetic energy is conserved. Objects stick together after the elastic collision.

When the velocity of a mass on a spring is zero, the acceleration is at