- The sum of electrostatic and magnetic forces acting on an object is called:
- If charge is moving parallel or antiparallel to magnetic field vector, it will experience...
- When a source is moving at or above the speed of sound, what can form?
- For points in space relatively distance from the dipole, what does the product of r1 and r2 approximate? What about r1-r2?(need clarification?)
- Not only are moving charges affected by magnetic fields, they can also create them. Magnetic fields only exert force on other moving charges. Explain what this exactly means.
- If source and detector are moving toward each other, what are the consequences? Hint: Doppler effect
- A datum is a "ground" or zero gravitational potential energy (U) position. Assuming surface of water is datum, what is U when diver of 80kg is 2m below the water.
- Give the formulas for kinetic, gravitational potential, and elastic potential energy.
- Suppose we have a two-pulley system in translational equilibrium, such that the weight of object is equal to twice the tension of rope. Hence, each rope supports half of the object's total weight. If I want to lift the object 3m above the ground (load distance), I must pull length of rope 6m (effort distance). Why is length of rope twice the displacement?
- If I triple the mass of an object, what happens to gravitational potential energy?
- Efficiency in conserving energy output to input gives a measure of amount of useful work generated by machine given amount of work put into system. How do you calculate efficiency?
- Are the magnetic field configurations for long, straight wire and a circular loop of wire the same?
- a measure of the average kinetic energy of the particles in an object
- What two types of energy transfer happens when you heat water on a stove?
- Temperature is directly proportional to the...
- At 20 degrees C, sound travels at velocity...
- Water is most dense as a liquid at...
- A spaceship traveling very fast relative to you fires a stream of photons at speed c away from you. You measure the photons' speed to bea) less than cb) more than cc) equal to c
- As a spaceship moving toward you at 0.6 the speed of light fires a probe toward you, relative to itself at 0.8 the speed of light, you see the probe approaching at about …a) 0.89cb) 0.94cc) 0.91cd) 0.87ce) 0.70c
- The length of a 100-meter long spaceship passing by you at 0.87c is seen to be …a) 50 mb) 87 mc) 100 m d) 125 me) 150 m