Mary and her younger brother Alex decide to ride the carousel at the State Fair. Mary sits on one of the horses in the outer section at a distance of 2.0 m from the center. Alex decides to play it safe and chooses to sit

A line charge with a variable linear charge density lambda(x) = cx stretches along the x-axis from x=0 to x=L. The total charge is Q.

A sphere of radius R has a radius dependent charge density p = B · r3 in terms of R and B.

Two 2.0-cm-diameter-disks spaced 1.5 mm apart form a parallel-plate capacitor. The electric field between the disks is 5.0×10 5 V/m .

An electric charge Q is uniformly distributed over a semicircle with radius R. Calculate the electric potential at the center of curvature if the potential is assumed to be zero at infinity.

An apparatus similar to the one used in the electric field mapping lab is used to find the electric field between two parallel conducting plates. The electric potential difference between the plates is 57.7 0.2 V and the distance spearating the plates is 8.3 0.1

A 50.7-g golf ball is driven from the tee with an initial speed of 53.5 m/s and rises to a height of 30.8 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed

What is the average kinetic energy of a particle of air at standard conditions?

A proton moves through a region of space where there is a magnetic field B⃗ =(0.50i+0.40j)T and an electric field E⃗ =(2.8i−4.0j)×103V/m. At a given instant, the proton’s velocity is v⃗ =(6.1i+2.8j−4.8k)×103m/s.

Estimate what Earth’s rotational acceleration would be in rad/s2 if the length of a day increased from 24 h to 48 h during the next 100 years.