When analyzing a system in physics, what must be included next to measurable quantities?

Which of the following are true for E = mc2? a. developed by John Dalton b. implies that a small change in mass produces a great deal of energy c. mainly used for nuclear reactions d. shows the relationship between meters and energy

Which of the following is an example of biotechnology? A. Bacteria are grown in a Petri dish in a lab B. A student traces their family tree C. DNA samples are compared and used to identify suspects in a crime D.

Two insulated wires, each 2.50 m long, are taped together to form a two-wire unit that is 2.50 m long. One wire carries a current of 7.00 A; the other carries a smaller current I in the opposite direction.

The outer ring of a wheel and axle is called a? A. axle B. wheel C. pulley D. lug

What two forces affect the level of an objects acceleration?

If many household substances classify as acids or bases what is the ph scale

A protostar forms once the nebular cloud condenses and the core begins

How do whales bats and dolphins use echolocation? A To scare away predators B To attract mates C To orient them selves and find food D To tell animals of there species where they are

How much force would be needed to move a car with the mass of 100kg to an acceleration of 5m/s/s?

A pendulum bob is made from a sphere filled with water. What would happen to the frequency of vibration of this pendulum if the sphere had a hole in it that allowed the water to leak out slowly?