A device that starts or stops the flow of current

If a wave has a wavelength of 9 meters and a period of 0.006, what is the velocity of the wave? A. 1,285 m/s B. 1,200 m/s C. 1,800 m/s D. 1,500 m/s

True or false a force cannot set a motionless object in motion

The mass of a string is 5.40 10-3 kg, and it is stretched so the tension in it is 215 N. A transverse wave traveling on this string has a frequency of 260 Hz and a wavelength of 0.60 m. What is the length of the string

According to the kinetic theory of gases, the kinetic energy of molecules is proportional to which factor? A. Concentration in moles/liters B. temperature in kelvin

True or false: all atoms of an element have the same number of protons in the nucleus?

Inert gas used to make bright city lights True or False

A boulder on top of a cliff has a potential energy of 12400J. How high above is the boulder?

If the graph represents speed what is measured on the x and y axes

It is difficult to lift a heavy stone than the lighter one on the earth, why?

The vapor pressure of ethanol at 25 degrees C is 7.83 kPa. Calculate the vapor pressure in atm. Round answer to 3 significant digits.