You are a scientist trying to develop a technology that uses the electromagnetic spectrum that can be used to power wrist watches. you need to have a part of the spectrum that carries enough energy to power the watch and is abundant in the environment and is safe

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.