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- Calculations Involving Significant Figures [02/22/2002]
My physics class is having a fair amount of trouble with significant
- Carbon Dating [05/27/1999]
Bones A and B are x and y thousands of years old, respectively. Bone A
contains three times as much Carbon 14 as bone B. What can you say about
x and y?
- Carbon Dating the Shroud of Turin [05/16/2000]
In 1988, scientists found that the Shroud of Turin contained 91% of the
amount of carbon-14 contained in freshly made cloth of the same material.
How old is the Shroud according to the data?
- Card Stacking Problem [06/10/2006]
Is it possible to stack a deck of cards so that the top card on the
stack does not overlap the bottom card at all?
- Center of Mass of a Disk with a Hole [02/19/2001]
A circle of radius R with center (0,0) has a smaller circle of radius R/2
and center (R/2,0) removed from its side. Where is the center of mass of
the remaining piece?
- Centripetal Acceleration [05/05/1997]
When a vehicle is going around a curve, are the forces balanced?
- Centroid - Center of Gravity [03/25/2002]
Can a triangle have a unique centre of gravity?
- Chaos Theory and the Pendulum [12/31/2001]
How is chaos theory related to physics?
- Circular Motion and Acceleration [12/03/1999]
How can an object experiencing circular motion always be accelerating
toward the center if the distance from the center is constant?
- Coefficient of Friction [10/17/1997]
An explanation of static and kinetic friction.
- Colliding Balls [04/28/1998]
A 5 kg ball attached to a pendulum is let go from a 45 degree angle
causing the 5 kg ball to collide with an adjacent 3 kg ball...
- Collision of Two Circular Objects [02/02/2002]
If I have two coins moving across a frictionless surface, knowing their
velocity and angles, how can I find the angle of each object after they
- Combining Multiple Signals in Data Transmission [02/18/2001]
How can a cable carry so much information? How can data carriers compress
multiple signals and then pull them apart again?
- Combining Ohm's Laws Formulas [04/12/2001]
In electronics, there are two main formulas, V = I*R and P = V*I. How can
I combine these to get formulas like P = I^2*R?
- Comparing Collisions [05/20/2002]
How does a head-on collision between two cars moving at 35 mph
compare to a collision between a wall and a car moving at 70 mph?
- Compressing a Spring - Hooke's Law [08/09/1999]
What work is required to compress a spring from a natural length of 4m to
2m if a force of 6N is required to compress it to 3.5m?
- Computing Apparent Mass From Rest Mass and Speed [05/27/2002]
How can I compute the change in mass for a moving object? And why
does the change appear to be zero for speeds like 20 mph?
- Converting Fluid Velocity [09/08/2002]
I have to convert fluid velocity, m^3/s, to linear velocity, m/s, but I
don't know how to convert m^3 to m.
- Converting mW to dB [06/14/2001]
I found this equation during a radio receiver discussion: 4x10-12mW = -
114dBm. How does it equate?
- Convex Lens Algebra [11/09/1998]
A focused image from a convex lens is projected on a screen at 3x
magnification. What is the focal length of the lens?
- Correcting a Speedometer for a New Wheel Diameter [11/28/2000]
A speedometer was designed for a wheel diameter of 65 cm. When a 75 cm
wheel is used, the information from the road speed sensor is wrong. How
must the input frequency to the sensor be adjusted for accuracy?
- Coulomb's Law and Particle Repulsion [09/26/2004]
Two electrons are located 0.08 picometers from each other. Calculate
the force of repulsion between them.
- Curl of a Vector Field [05/22/1999]
What does the term curl mean in math, and how do we define it in terms of
- Cylinder on an Inclined Plane [12/17/1997]
Is there a formula to determine the time it will take for a uniform
cylinder to travel a distance along an incline of varying degrees?
- Daylight Hours and Latitude [1/9/1995]
How does the number of daylight hours on a given day of the year depend
- Degrees of Freedom [12/17/2002]
What is meant by 'degrees of freedom'?
- Density of a Stone [09/14/2002]
A stone having a mass of 160 g displaces the level of water in a
cylinder by 30 mL. Find the density of the stone.
- Deriving Distance from the Energy Conservation Law [7/6/1995]
How do we get S = So+0.5*v*t^2+Vo*t, for a free-falling object, from the
energy conservation law?
- Deriving the Arcsin Formula [01/24/1999]
Why is the arcsin(A) = pi/2 + bi, for some b? How can you derive the
inverse sine formula (i.e.: arcsin)?
- Development of Einstein's Equation [06/02/1999]
What equations and principles did Einstein use to come up with the
equation e = mc^2?
- Difference in Radius, Difference in Speed [06/25/2002]
What is the difference in speed between a point on the tread of a tire
and another point closer to the center, if the tire is rotating at
- Differentiation Problem [11/15/1997]
A light shines from the top of a pole 50 ft. high. A ball is dropped from
the same height at a point 30 ft. away from the light...
- Digital Compass [08/23/2002]
How does a digital compass work?
- Distance to the Sun [04/16/1999]
Find the distance from Earth to the sun when t = 90 days...
- Doppler Effect and Math [6/1/1996]
How is the Doppler Effect related to mathematics?
- Earth's Balance [12/20/2001]
Why would Earth change its orbit and turning if something as heavy as the
Ross Iceshelf moved up some amount of miles?
- Earth's Rotational Speed [6/24/1996]
Should the earth's rotational speed be referred to in revolutions per...
or in miles per hour?
- Effective Force Exerted by a Moving Mass [08/23/2001]
Determine how much force a mass of 1000 lbs. moving at 50 inches/sec will
exert on an object in its path about 0.1 inches from where it started
(assuming it was moving at the specified velocity throughout the 0.1"
- Effect of Gravity on a Stalled Jet [09/05/1997]
If a 747 jet is flying at 30,000 feet and the engines stop working, will
it glide to a reasonably safe landing? Or will it fall straight down?
- Eigenvalues [12/18/1998]
What is an eigenvalue and how is it used?