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## Physics Resources

How can you manage to skip a flat stone over water? How can you increase the number of skips? Explain how this works and how it was used in WW2 in a squadron called the Dam Busters?

When a ball moves slowly is experiences laminar flow but when it moves fast there is turbulent airflow. What does this mean? What is the Reynolds number? Why are their dimples on a golf ball...

Mud is thrown off the rim of a wheel of radius a, on a car travelling with speed v. Show that if v2 ≥ ga then no mud can be thrown higher than  a + v2 / 2g +ga2/2v2

object distance u=(50±0.5) cm and images distance v=(20.1±0.2)cm.    to obtain central value is easy. but how to obtain final error in focal lenght.   in the book where...

Physics students make up the lion's share of my current teaching efforts here at Wyzant. I've stuck mostly to AP and the first-year undergraduate level of physics, specifically in the non-calculus-based version of physics.   For non-calc physics, the mathematical skills required are surprisingly low. Since students at that level are rarely (if ever) asked to derive or define equations,... read more

Jimmy is sitting in a box on wheels at the top of a hill. If Jimmy and the box both have a mass of 246 kg and the the hill at location A is 97m high. When Jimmy gets to the bottom of the first...

Suppose that by stirring 495 g of water you are able to increase its temperature from 19.0° C to 21.0° C. Find the increase in the water's entropy. answer in J/K