When a plastic rod is rubbed with a wool cloth, the wool acquires a positive charge. What is the best explanation for this effect?

Nearly monochromatic light of wavelength 420 nm is split in two beams. The first beam traveled 105 nm to the screen more than the second beam, thus yielding a path difference of 105 nm. A) Calculate the phase difference between the two beams.

Objects on the moon's surface have an acceleration due to gravity one-sixth that on the earth's. What would the 5 0 kg boy weigh on the moon?

What is the purpose of a liner in a sanitary landfill? A. To prevent leachate from seeping into groundwater. B. To leach contaminants from dolid waste. C. To increase the rate of incineration. D. To collect natural gases and generate electricity.

What types of scientific claims should be verified

Measurements of the earth's magnetic field have been recorded since?

A car is traveling at vx = 20 m/s. The driver applies the brakes and the car decelerates at ax = - 4.0 m/s2. What is the stopping distance? A car is traveling at = 20. The driver applies the brakes and the car decelerates at = - 4.0.

Most earthquakes occur along or near the edges of the earth's

What can we say about the rock as it falls to Earth? A) It accelerates as it falls. B) It falls at a constant rate of speed. C) It is at a constant velocity as it falls. D) It accelerates until it reaches a peak velocity, then decelerates.

What is true about the nodes and antinodes of a standing wave?

A large truck loaded with scrap Stella weights 14 metric tons and is traveling north on the interstate heading for Chicago. It has been averaging 48km/h for the journey and has traveled over the 1450 km so far. It has just stopped to refuel.