An 18-karat gold necklace is 75% gold by mass, 16% silver, and 9.0% copper. What is the mass, in grams, of the necklace if it contains 0.28oz of silver?

Which coefficient of O2 is needed to balance the equation C3H8 + O2 → 3CO2 + 4H2O? a. 2 b. 3 c. 5 d. 6

A circular loop of wire is held in a uniform magnetic field, with the plane of the loop perpendicular to the field lines.

When a car accelerates gradually (no squealing tires), is the friction between tires and road kinetic or static? When a car accelerates gradually (no squealing tires), is the friction between tires and road kinetic or static?

A radio wave has a frequency of 3.60 * 108 hz. what is the energy (in j) of one photon of this radiation? enter your answer in scientific notation.

These mystery elements are at the top of their families on the periodic table. An element that is in the same family as element C is likely to have which properties?

particle is projected from the surface of the planet Krypton with a speed equal to 3.6 times the escape speed from that planet's surface.

Does the box contain positive charge, negative charge, or no charge? Does the box contain positive charge, negative charge, or no charge?

How does acceleration affect speed and velocity

What will not result in acceleration

Magma from a volcano is considered a fluid because it can flow and it exhibits viscosity true or false