In most four-stroke internal combustion engines, when does the piston move upward?

A. during the compression stroke only

B. during the compression and exhaust strokes

C. during the intake and exhaust strokes

D. during the power and intake strokes

To introduce you to the concept of escape velocity for a rocket. the escape velocity is defined to be the minimum speed with which an object of mass m must move to escape from the gravitational attraction of a much larger body, such as a planet of

Ron oxide reacts with aluminum to give aluminum oxide and iron. What kind of chemical reaction is this? combustion decomposition replacement synthesis

In a population of seals, most of the seals have similar coloring. However, one seal has albinism. This seal is white and is almost completely blind.

A waterwheel is an example of:

6) Two small balls, A and B, attract each other gravitationally with a force of magnitude F. If we now double both masses and the separation of the balls, what will now be the magnitude of the attractive force on each one?

What is the purpose of draeing a free-body diagrams

Two flywheels of negligible mass and different radii are bonded together and rotate about a common axis (see below). The smaller flywheel of radius 30 cm has a cord that has a pulling force of 50 N on it.

How does hypersensitive response differ from systematic acquired resistance?

4. A latch holding a cart in place, hanging high above the ground, breaks and the cart falls. The cart started from rest and is in free fall until it hits the ground. a. What is the velocity after 3.2 s? b. How far has the cart fallen at 3.2 s?

A ball is moving across a level platform 1.6m above the floor. After rolling off the ball hits the floor 20 from the base of the platform.