Which reaction is a single replacement reaction?

A. 2H2+O2-2H20

B. 2H202-2H20+O2

C. KOH+HCI+H2O

D. Cu + 2AgNO3 - 2Ag + Cu (NO3) 2

The threshold of hearing is defined as the minimum discernible intensity of the sound. It is approximately 10âˆ'12w/m2. Find the distance d from the car at which the sound from the stereo can still be discerned.

A 1200-kg car moving at 14 m/s collides completely inelastically with a 4500-kg truck at rest. Since the collision is completely inelastic, the car and the truck stick together and move as a single object after the collision.

What is the absolute pressure of the air in your car's tires, in psi, when your pressure gauge indicates they are inflated to 39.0 psi? assume you are at sea level?

Can each rock type can follow only one specific path in the rock cycle

What is the frequency of a wave if the wave speed is 24 m/s and the wavelength is 2m?

What has become an important alternative to Piagetian approaches?

How would life on earth be different if earth's axis were not tilted with respect to its orbit? A. There would be no seasons. B. There would be no day and night. C. All places would have the same climate. D. The seasons would be much shorter.

What will a spring scale read for the weight of a 75.0-kg woman in an elevator that moves upward with constant speed of 5.8 m/s?

What's the definition of: • cellular respiration • photosynthesis

What are the steps that are important to take for your safety during an earthquake? a. stay away from walls and windows c. stay away from electrical and gas lines b. get under a desk or table d. all of the above