Spherical napthalene ball of mass 4 gm is kept suspended in a
large
volume of stagnant air at 318 K and 1 atm pressure. If the
naphthalene ball gets
sublimated directly into the dry air, calculate the time required
for the reduction in
the mass of ball from 4 gm to 3 gm. Derive the expression for
calculation of time
required. Data: DAB = 6.92 × 10-6 m2/s, sublimation pressure of
naphthalene at 318 K is 0.8654 mm Hg and...
A solid spherical ball of radius 4 meters has a charge of 8
nC.
a) Calculate the electric potential at r = 2, r = 4, and r = 6
meters away from the center of the ball if it is a conducting
sphere.
b) Calculate the same things if it is an insulating sphere of
uniform charge density.
c) Calculate the same things if it is an insulating sphere of
non-uniform charge density, ρ = kr2
Answers should be:...
A solid spherical ball of radius 4 meters has a charge of 8
nC.
a) Calculate electric flux through the sphere at r = 2, r = 4,
and r = 6 meters away from the center of the ball if it is a
conducting sphere
b) Calculate the same things if it is an insulating sphere of
uniform charge density.
c) Calculate the same things if it is an insulating sphere of
non-uniform charge density, ρ = kr2
A Spinning Ball: What is the magnetic field inside and outside a
uniformly charged solid ball (total charge ?, radius ?) spinning
about its axis with angular velocity ? ̂?? Do this three ways:
(a) Set up a Biot-Savart-style integral to determine the field
at any location. (Do not solve this integral, but make all
quantities explicit.)
(b) Simplify your integral using a location along the axis of
rotation: ? = ? ̂? or ? = 0. Solve for ?...
A solid metal ball is thrown from the top of a building at an
angle of 30° above the horizontal with an initial speed of 13 m/s.
The ball lands on the ground 3.4 s after it is thrown.
What is the height of the building (in m)?
A solid bowling ball with a radius of 10.9 cm and a mass of 7.3
kg rolls along a bowling alley at a linear speed of 2.6
m/s.
What is its translational kinetic energy? What is its rotational
kinetic energy
Calculate the mass of solid sodium acetate and how much of 1.0 M
of acetic acid required to mix with 100.0 mL to prepare a pH 4
buffer and total common ion concentration= 0.200 M (Show all work).
1. How many grams of solid sodium acetate is needed? 2. How much mL
of 1.0 M acetic acid is needed?
A hollow ball and a solid sphere are released from rest and roll
down an inclined plane. Both have a mass of 1 kg, a radius of 5 cm,
and experience a torque of 0.01 N m. Assume both balls roll without
slipping. What is the difference in their linear velocities after
the balls have both lost 4 m of elevation? I’d like you to use
energy to solve this problem.