Compared to the total mass and total charge at the beginning of a redox reaction, the total mass and total charge upon completion of the reaction is

1. Less

2. Dependent on what the reaction is

3. Greater

3. The same

A cello string is 0.695 m long and plays a 98.0 Hz note. What is the speed of the waves in the string? (Unit = m/s)

A light bulb is 4.1 m from a surface. how much luminous flux must the bulb produce if the illuminance required is 22 lx?

If you have a 60 g egg dropped from a height of 10 m with cushioning material that delays the impact by 2 seconds what was the force exerted on the egg by the floor?

A string with a length of 4.00 m is held under a constant tension. The string has a linear mass density of μ = 0.006 kg/m. Two resonant frequencies of the string are 400 Hz and 480 Hz. There are no resonant frequencies between the two frequencies.

Define scalar and vector

Two very small spheres are initially neutral and separated by a distance of 0.30 m. Suppose that 2.50 1013 electrons are removed from one sphere and placed on the other. (a) What is the magnitude of the electrostatic force that acts on each sphere?

Why is it important to balance a chemical equation? A. It is not important to balance a chemical equal B. To make sure you have the correct products C. To make sure you have the correct reactants D. To obey the law of conservation of mass

The presence of icicles hanging off the eaves of a wood-framed structure is most likely due to: heavy snow followed by a thaw. improper insulation in wall cavities. use of a poor-quality roof sheathing material. lack of proper roof ventilation.

Both gravitational potential energy and kinetic energy depend on

How much work is done when a 105 g tomato is lifted 19.2 m?