when 12 is added to a certain number and the result is multiplied by 4. the final result is 60. find the number.

How long does it take light to travel between earth and the nearest star?

Calculate the amount of hcn that gives the lethal dose in a small laboratory room measuring 14 * 15 * 8.0ft. the density of air at 26∘c is 0.00118g/cm3.

A 0.100-kilogram white ball moving with a velocity of 5 meters/second along the positive x-axis hits a stationary blue ball of the same mass. Energy is not necessarily conserved, but momentum is.

What should happen to the demand for speed (measured by the average speed on highways) once airbags are included on cars?

How is it possible for a single sedimentary rock to contain rock particles animal shells and minerals that crystallized from water?

At t = 19.8 seconds an object with mass 2.0 kg was observed to have a velocity of m/s. At t=20.02 seconds its velocity was m/s. What was the average (vector) net force acting on the object?

How do you get over a break up? (I know this has nothing to do with school work but I really need some advice.)

Suppose you have a hypothesis you believe to be correct what should you do to make you become a theory A. Write a letter to the noble prize committee B. Do the same experiment over and over again C.

What method of heat transfer does heat energy use to reach earth from the sun?

What is the spring constant (in n/m) of a spring that stores 100 J of elastic potential energy when it is stretched 5 m?