A solution with a pH of seven must be

A. An acid

B. A base

C. neutral

D. water

A listener increases his distance from a sound source by a factor of 4.49. Assuming that the source emits sound uniformly in all directions, what is the change in the sound intensity level in dB?

If a car goes around a corner at a constant 20 miles/hour, does its velocity change?

What nonliving materials are important to living things?

Which term describes the forces acting on the car? A. inertial B. buoyant C. balanced D. unbalanced

A quarterback throws a football with angle of elevation 40degrees and speed 60ft/s. Find the horizontal and vertical components of the velocity vector

If the photon scatters in the backward direction, what is the magnitude of the linear momentum of the electron just after the collision with the photon

A car speeds up from 15 m/s to 30 m/s in 12 seconds. What is the acceleration of the car?

These examples include learned and innate behavioral adaptations of animals. Which statement describes a learned behavioral adaptation of an animal? A. Your knee j e r k s when it is hit by a doctor. B. A dog shakes water from its fur. C.

Vitellium (Vi) has the following composition:Vi-188: 187.9122 amu; 10.861%Vi-191: 190.9047 amu; 12.428%Vi-193: 192.8938 amu; 76.711%Based on this data, what can you predict about the average atomic mass of vitellium?

if you have an experimental setup which has three unknowns, how many linearly independent equations do you need to determine the unknowns to find one unique solution?