D1-1.
An object has a net charge of 25 C. Does it have more electrons or
protons and how many more?
[1.5625x1014 more electrons]
D1-2.
An object has a net charge of +4 nC. Does it have more electrons or
protons and how many more?
[2.5x1010 more protons]
D
(Rotational Motion with Uniform Acceleration)
After final exams, you hop into your car and speed away from CBU. Assuming
that you accelerate uniformly from rest at t=0 to a speed of 15 m/s in 5 seconds and
that the diameters of your tires are 60 cm, answe
You should know how to do the following:
1. Find how many extra electrons or protons an object has if its net charge is given.
2. Find the net electric force exerted on a point charge by one or more other point
charges.
3. Find the net electric field at a
Test 1 :
1. Convert a quantity from one set of units to another set of units.
2. Convert a 2-D vector from rectangular form (components) to polar form
(magnitude and angle), or from polar form to rectangular form.
3. Add or subtract two or more vectors.
4
You should know how to do the following:
1. Find the work done by a force in moving an object through a displacement.
2. Know that power is the rate at which work is done (or the rate at which energy is delivered or
used). Find the power delivered or used
1. A capacitor is made out of two round plates separated by 0.5 mm. Each plate
has a radius of 5 mm. The space between the plates is filled with Teflon, which has
a dielectric constant of 2.1. Find the capacitance of the capacitor.
[2.9 pF]
2. 2.2 F capac
(The Rolling Yo-Yo)
A yo-yo has an inner radius of 0.5 cm, an outer radius of 3 cm, a mass of 0.5 kg,
and a moment of inertia of 1.85 kg cm2 about an axis through its center. We saw in
class that the yo-yo will roll to the right regardless of whether the
You should know the answers to the following questions and know how to do the
following tasks:
1. Find the total power emitted by an object using Stefans Law or find the total
power absorbed by an object from its surroundings. Find the peak wavelength in
You should know how to do the following:
1. Know the free-space wavelength range of the visible spectrum.
2. Use the Law of Reflection and Snells Law at an interface between two media.
Find the critical angle and understand what happens in TIR.
3. Tell if
You should know how to do the following:
1. Be able to sketch the field lines for a bar magnet.
2. Find the direction of the magnetic field at points in space due to current flowing
in a straight wire (Field RHR #1). Recall that the size of the field is d