You are 15.0m from the source of a sound. At that distance, you hear it at a sound level of 20.0dB. How close must you move to the sound to increase the sound level to 60dB?

I think its 45.0cm?

15.0cm

45.0cm

55.0cm

60.0cm

85.0cm

Which one of these is a chemical change? A.) Melting Ice B.) Making powdered juice C.) Cutting paper D.) Burning a log

Which of the following is true of machines? A. Machines increase the amount of force required to do a task. B. Machines reduce the total amount of work required to do a task. C. Machines increase the total amount of work required to do a task. D.

How long does it take an object thrown in the air with a velocity of 4.5m/s to reach its maximum height

A ceiling fan draws a current of 0.625 A and has a voltage of 120 V. The resistance of the ceiling fan, to the nearest whole number, is ___ Ω.

What effects a materials resistance

Hat is a scientific theory? Make up your own scientific theory.

Which of the following is an example of a velocity? O A. 12 m/s O B. 45 km/hr south O C. 55 km/hr D. - 5 m/s2 east

What was the total weight (lbf) of chocolate in the vat? the specific gravity of chocolate is approximately 1.24?

You are in the lab and are given two rods set up so that the top rod is directly above the bottom one. The two straight rods 50-cm long are separated by a distance of 1.5-mm each with 15 A of current passing through them.

What is the explanation for feather beds being warm