Which of the following electron configurations for neutral atoms is correct?

helium: 1s1, 1p1

nitrogen: 1s2, 2s2, 2p3

silicon: 1s2, 2s2, 3s2, 2p63p2

the third sub-level

Li

Two masses are connected by a string which passes over a pulley with negligible mass and friction. One mass hangs vertically and one mass slides on a frictionless 30.0-degree incline. The vertically hanging mass is 6.

An electric field exerts a force of 3.00 E - 4 N on a positive test charge of 7.20 E-4 C. The magnitude of the field at this location of the charge is a) 0.24 N/C b) 0.417 N/C c) 15.6 N/C d) 21.6 N/C e) 2.4 N/C

A jogger in a race ran 30 kilometers in 2 hours. What was the average speed of the jogger?

4) A motorcycle travels at a constant 90 km per hour in the positive direction down a straight line highway. What is the displacement, in standard units, of the car 75 seconds later?

A box has a mass of 5.8kg. The box is lifted from the garage floor and placed on a shelf 2.5m off the ground. How much gravitational potential energy does the box have before it falls off the shelf? A. 142.1 m/s B. 14.5 J C. 142.1 J D. 18.13 J

Which statements accurately describe the Doppler effect?

Describe how mass and distance affect gravitational force.

a bike can climb the inclined road at uniform speed of 72 km/hr by applying force 500N what will be the power applied by the bike?

A wave has a wave length of 2 m and a frequency of 500 Hz, what is its speed?

Can anything block a magnet's force feild?