3. How many valence electrons are in the outermost energy level of each of the following elements?

a. Helium

b. Lithium

c. Nitrogen

d. Magnesium

Find the equivalent capacitance of a 4.20 uf capacitor and an 8.50 uf in parallel and in series

A farmer uses a tractor to pull a 150 kg bale of hay up a 15∘ incline to the barn at a steady 5.0 km/h. The coefficient of kinetic friction between the bale and the ramp is 0.40. Part A What is the tractor's power output?

The club was in contact with a ball, initially at rest, for about 0.0052 s. If the ball has a mass of 55 g and leaves the head of the club with a speed of 2.4 ✕ 102 ft/s, find the average force (in kN) exerted on the ball by the club.

Electric energy is generated at a nuclear power plant using which type of nuclear reaction? A. A nucleus splitting to form two or more smaller nuclei B. Two nuclei giving off alpha particles C. Two nuclei joining to form a larger nucleus D.

For a line on a graph to represent an object increasing its speed, the line must show A) an increasingly steeper slope B) a negative slope C) a positive slope that is becoming more horizontal D) a positive slope

What is concave mirror

Two boxes are suspended from a rope over a pulley. each box has weight 50 n. what is the tension in the rope

What happens when you put a galvanized zinc nail in copper solution for an hour? Does is rust or turn different color? What is the outcome? What happens after an hour in vinegar?

Psuedopod in a sentence

Study the scenario. As a spacecraft moves beyond Pluto, its thrusters are turned on for a short time to boost its speed to approximately 32,500 mi/h. The thrusters are then turned off.