2 If the mass of a proton Y's 1:67X10-2759 and the mass of an election is altx 1034
Calculate the force of gravitation between
i a protron and an election
two electrons
in two protrons
Take G= 6.67X 10" N m² kg , distance
between the protrons = 4.0m, distance
between the electrons = 2x 102m,
distance between the electrons ex 10²m
distance between the proton and the
electron -
5.4 x 10-11 m

If you mix chlorine lithium in nickel together which two elements would be the most reactive

(2) (a) you have a simple circuit that consists of only a battery (δvbat=1.5v) and two resistors with resistance r1=10ω and r2=5ω, connected in series with each other. what is the current running through the battery? (b) you re-arrange your circuit so now r2 is attached in parallel to r1 rather than in series. what is the current running through the battery? (c) you add an additional resistor r3=7ω on the same branch as r2. what is the current running through the battery? (d) what is the power dissipated in r3?

What is friction? how does it affect the motion of an object?