Two electrons are separated by a distance of
3.00 × 10^−6 meter. what are the magnitude and
direction of the electrostatic forces each exerts
on the other?
(1) 2.56 × 10^−17 n away from each other
(2) 2.56 × 10^−17 n toward each other
(3) 7.67 × 10^−23 n away from each other
(4) 7.67 × 10^−23 n toward each other

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Argon is adiabatically compressed from an initial volume of 16 liters to a final volume of 2 liters. by what factor do the following quantities change? do they increase or decrease? (a) the rms speed (b) the thermal energy of the gas (c) the molar specific heat cv (d) the pressure

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine