Shelly starts from rest on her bicycle at the top of a hill. After 6.0s she has reached a final velocity of 14m/s. what is shellys acceleration.

Machines A, B, and C do the same amount of work, but they each take a different amount of time. Machine A takes more time as compared to machine C. Machine B takes the maximum time to do the same amount of work.

Lucas has been challenged to increase the efficiency of a device he is redesigning. His goal is 90 percent efficiency. The work input of the device is fixed at 10 J, so Lucas is trying to improve work output.

A solid-propellant rocket has chamber pressure of 6.35 atm with propellant density of 3.8 g/cm3 and burn area of 975 cm2. Find the total burn time (in seconds) if the propellant mass is 320 kg.

A person wearing a shoulder harness can survive a car crash if the acceleration is smaller than - 300 m/s. assuming constant acceleration how far must the front end of the car collapse if 2 it crashes while going 101 km/hr?

Elements heavier than hydrogen are formed when light elements undergo nuclear fusion. Fusion takes place within stars at temperatures nearing 108K. Explain why this high energy is required for fusion to occur.

Which type of orbital will be occupied by the electrons of highest energy for the In + ground-state ion?

Consider a "crystal" consisting of two nuclei and two electrons. (a) Taking into account all the pairs of interactions, find the potential energy 1 of the system as a function of d.

jason hits a baseball off a tee toward right field. the ball has a horizontal velocity of 10 m/s and lands 5 meters from the tee. what is the height of the tee? show your work, including formula (s) and units.

What is the average amount of energy of motion in the particles of a substance

A race car is traveling at 76 m/s when it slows down at 9 m/s^2 for 4 seconds. What is his new velocity