Atoms of element A decay to atoms of element B with a half-life of 20,000 years. If there are 10,000 atoms of A to begin with (and 0 atoms of B), how long will it take for there to be 2,500 atoms of A?

If the Net Force of the object is 30 N to the left, and mass is 3 kg what is the objects acceleration?

Technician A says some compressor service procedures can be performed on the vehicle if space permits. Technician B says modern compressors can be removed and reinstalled without discharging the rest of the system. Who is correct?

Whether calculating speed or acceleration, this data is required

If KE becomes less than IF, what phase change occurs? gas to liquid solid to liquid plasma to gas liquid to solid

What is the biggest barrier to the use of renewable energy in the United States? Reliability and consistency Citizen opposition to negative environmental impact Limited transmission capacity to deliver the energy to the consumer Limited renewable

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.