If two firecrackers produce a combined sound level of 85 dB when fired simultaneously at a certain place, what will be the sound level if only one is exploded?

Fine grains of beach sand are assumed to be spheres of radius 38.9 µm. These grains are made of silicon dioxide which has a density of 2600 kg/m3 . What is the mass of each grain of sand? Answer in units of kg. ... ?

A wheel that was initially spinning is accelerated at a constant angular acceleration of 5.0 rad/s^2. After 8.0 s, the wheel is found to have made an angular displacement of 400 radians.

What factors define an object's motion

The gravitational force between two objects increases as mass A. decreases or distance decreases. B. decreases or distance increases. C. increases or distance decreases. D. increases or distance increases.

Humidity is to blame for that muggy, steamy feeling you experience on some hot summer days. What gas in the atmosphere causes humidity? A) oxygen B) hydrogen C) nitrogen D) water vapor

What type of energy is formed when chemical bonds are broken? A. Chemical energy B. Thermal energy C. Radiant energy D. Light energy

The liquid contained in batteries that conducts electric charge is called the: solution, electrolyte, suspension, colloid

Someone jumped from a high altitude at 31,000m above the earth. he freefalled for 4 min and 36 secs with top speed of 988 mph

What does the law of reflection mean?

Compared with the peak wavelength given off by the sun, what is the peak wavelength given off by a hotter star? A.) shorter in wavelength and higher in energy B.) shorter in wavelength and lower in energy C.