How many protons and electrons are present in a vanadium atom?

When 7.9*1014 Hz light shines on a plate of unknown material, it is determined that the stopping potential is 1.1 V. Determine the work function (in eV) & the cutoff frequency. Wo = eV fo =

What is another name for kepler's second law? a. law of periods b. law of ellipses c. law of harmonies d. law of equal areas in equal times

If two teams play tug of war and neither team can move the rope, is the rope experiencing balanced forces or action and reaction forces? how do you know?

Toasting bread involves the transformation of 1. electrical energy into mechanical energy 2. electrical energy into thermal energy 3. thermal energy into electrical energy

A vector A of magnitude 6 and another vector B have a resultant magnitude 12. The vector B: a. must have a magnitude of at least 6 but no more than 18 b. may have a magnitude of 20 c. cannot have a magnitude greater than 12 d.

Un móvil parte del reposo y, al cabo de 5 s, alcanza una velocidad de 5 m/s; a continuación, se mantiene con esa velocidad durante 4 s, y en ese momento frena uniformemente y se detiene en 3 s.

A 2.0-kilogram mass is located 3.0 meters above the surface of Earth. What is the magnitude of Earth's gravitational field strength at this location? (1) 4.9 N/kg (3) 9.8 N/kg (2) 2.0 N/kg (4) 20. N/kg

How long did the astronauts stay on the moon?

Brenda is standing on the beach; the sea is choppy. she observes that the crests of distant waves appear not only smaller, but also closer together than do the crests of waves nearer the beach. this example illustrates a depth cue known as:

If two waves in the same space interfere completely destructively, which of the following occurs? A. The amplitude decreases. B. The amplitude increases. C. The wave speed increases. D. The wave speed decreases.