Blog

Chad is willing to pay $4.00 to get his first cup of morning coffee. He buys a cup from a vendor selling coffee and gets $1.75 of consumer surplus. Chad paid ______ for the cup of coffee. 

Two point charges are on the x-axis.  Charge q1 = 5.00 uC is at the origin and q2 = -3.00 uC is at x = 0.350 m.  b)  Find the direction of the electric field at a distance of 0.450 m directly above q2.

Two point charges are on the x-axis.  Charge q1 = -4.00 uC is at the origin and q2 = 3.00 uC is at x = 0.500 m.  a)  Find the magnitude of the electric potential at a distance of 0.350 m directly above q2.

A 3.00 uC point charge is released from rest 0.450 m away from a 5.00 uC point charge.  If the 3.00 uC point charge has a mass of 0.002 kg,  what is its initial acceleration? Ignore gravity.

A proton having a speed of 3.0 × 10^6 m/s in a direction perpendicular to a uniform magnetic field moves in a circle of radius 0.20 m within the field.  What is the magnitude of the magnetic field? (e = 1.60 × 10^-19 C, mproton = 1.67 × 10^-27 kg)

An electron moves with a speed of 8.0 × 10^6 m/s along the +x-axis.  It enters a region where there is a magnetic field of 2.5 T, directed at an angle of 60° to the +x-axis and lying in the xy-plane.  Calculate the magnitude of the acceleration of the electron. (e = 1.60 × 10^-19 C, me1 = 9.11 × 10^-31 kg)  

A ball is thrown straight upwards with a speed of 15.0 m/s and is caught when it comes back to the same point.  a) How long does it take the ball to reach its maximum height?  

Which change in the price index shows the greatest rate of inflation: 30 to 40, 80 to 100, 100 to 125, or 150 to 180?

A speed boat traveling at 19.5 m/s is 36.0 m from a no-wake buoy.  The boat immediately begins to slow down at the rate of 3.60 m/s^2.  How long does it take the boat to reach the buoy?

Find the magnitude of the resultant of the vectors shown if: V1 = 38, V2 = 19, and V3 = 10