The average speed of a person in driving to school is 30 km/h. on the return trip along with the same route, the average speed is 25km/h. what is the average speed for the round trip to the school

the statement, "energy can neither be created nor destroyed, but can change from one form to another," is blank. the first law of thermodynamics

A car possesses 20,000 units of momentum. what would be the car's new momentum if ... its velocity was doubled?

A 600 N force is developed in the braking system of a car to bring it to rest over a horizontal distance of 80.0 m. What work is done by the braking system?

Describe the force/distance trade off. Why is this trade off described as an inverse relationship?

Two electromagnets are running with equal amounts of electric current. Electromagnet A uses a piece of iron as its metal core, while electromagnet B uses a piece of silver. Which one would have a stronger magnetic field?

A projectile is launched over a horizontal surface in such a manner that its maximum height is 3/5 of its horizontal range. Determine the launch angle.

Two identical capacitors are arranged in a circuit. What is the ratio of the equivalent capacitance of the circuit when the capacitors are in series to that when they are in parallel?

A car's position in relation to time is plotted on the graph. What is the car's average velocity for segment C? A) - 4 m/s B) - 0.25 m/s C) 0.25 m/s D) 4 m/s

What percent of my Iodine-131 sample will be left after 7 half-lives?

A 58.0 kg snow skier is on the top of 351 m high hill. After she has gone down a vertical distance of 142 m, what is her mechanical energy? Explain your answer (CER) !