For 12 V lines, three consecutive LEDs and a resistor are used for lighting. The voltage drop across each LED is 3 V. What is the resistance of the resistor if a current of 50 mA flows through the circuit?

Which 3 components must be used in order for a light bulb to light? a. Battery b. Fuse c. Light Bulb d. Switch e. Wire

Which of the following can be natural sources of water pollution? a. volcanic activity b. earthquakes c. algae blooms d. all of the above

An Archer shoots an arrow horizontally at 250 feet per second. The bullseye on the target and the arrow are initially at the same height.

Of the solar radiation entering the atmosphere, about ___% reaches the surface directly as direct radiation.

Odor is a physical property of a substance and is detected by the sense of smell.

What is the Z number of an atom with 9 protons, 8 neutrons, and 7 electrons? 7 8 9 16 17

What is the most dense crust

V is the velocity of a particle moving along the x axis as shown. If x = 2.0 m at t = 1.0 s, what is the position of the particle at t = 6.0 s?

A compound consisting of atoms of small atomic mass is more likely to require

Wave can be described as A. a continuous transmission of energy from one location to the next B. The disturbance of particles in an area C. The transmission of energy through individual particles D. The motion of particles in a medium