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?

Scientists believe that there are three genes that contribute to skin color in humans. Which of these best describes the inheritance pattern of skin color?

A wheel with rotational inertia i is mounted on a fixed, frictionless axle. the angular speed ω of the wheel is increased from zero to ωf in a time interval t. what is the average net torque τ on the wheel during this time interval?

How does weathering affect statues?

Assuming that the bohr model is valid, what is the kinetic energy of a photoelectron liberated by a photon with a the given wavelength from a state with given z and n

After the discovery of Uranus, astronomers calculated its orbit and predicted its position in the sky using Kepler's laws of planetary motion, which had been known since the early 17th century.

Do you think an observer on another planet in the solar system might see eclipses

A. A vector is any element of a vector space. Is this statement true or false? A. True by the definition of a vector space B. False; not all vectors are elements of a vector space. C. False; a vector space is any element of a vector.

19 Which gas is the most abundant greenhouse gas? A. ozone B. chlorofluorocarbon C. carbon dioxide OD. methane E. water vapor Reset Next

The plates of a parallel-plate capacitor are maintained with a constant voltage by a battery as they are pushed together, without touching. How is the amount of charge on the plates affected during this process? a.

Which of the following creates a longitudinal wave? A. striking a gong B. turning on a flashlight C. shaking a rope up and down D. dropping a stone into a pond