The table shows the changes in velocity for several different cars. Each change takes place over a 10-second interval. Which cars are either speeding up or slowing down?

Technician A says that a crankshaft determines the stroke of an engine. Technician B says that the length of the connection rod determines the stroke of an engine. Which technician is correct? A. A only B. B only C. Both D. Neither

How many electrons in Cu

The national grid supplied a house with 18000000 J of energy in 1 hour. What was the average current supplied to the house in that hour? Write any equations that you use.

An air mass gets its temperature and humidity characteristics from

Which of these follows from Newton's laws about the energy of a moving object? A) The total mechanical energy of an object is always constant. B) The kinetic energy of an object remains the same if friction is absent.

A tradesman sharpens a knife by pushing it against the rim of a grindstone. The 35 cm diameter stone is spinning at 200 rpm and has a mass of 28 kg. The coefficient of kinetic friction between the knife and the stone is 0.20.

What is the unit for force we use when calculating F=ma?

A vector of magnitude 20 is added to a vector of magnitude 25. The magnitude of this sum. might be:. A. zero. B. 3. C. 12. D. 47. E. 50

Calculate the gravitational potential energy of a 10kg box on the top shelf of a closet, 2m above the floor

In late adulthood, changes in memory may bot be inevitable however, any decline in memory tends to invite