Recent content by Jtappan

Some one please help! Pressure Amplitude Homework Statement (a) What is the pressure amplitude of a sound wave with an intensity level of 124.5 dB in air? _____ N/m2 (b) What force does this exert on an eardrum of area 0.520 10-4 m2? _____ mN 3. The Attempt at a Solution...

1. Homework Statement (a) What is the pressure amplitude of a sound wave with an intensity level of 124.5 dB in air? _____ N/m2 (b) What force does this exert on an eardrum of area 0.520 10-4 m2? _____ mN 3. The Attempt at a Solution if P is amplitude of pressure, then...

Homework Statement During a rehearsal, all eight members of the first violin section of an orchestra play a very soft passage. The sound intensity level at a certain point in the concert hall is 32.0 dB. What is the sound intensity level at the same point if only one of the violinists plays...

1. Homework Statement The sound level 24 m from a loudspeaker is 66 dB. What is the rate at which sound energy is produced by the loudspeaker, assuming it to be an isotropic source? ____W 2. Homework Equations ? Something to do with Intensity? 3. The Attempt at a Solution...

Homework Statement The sound level 24 m from a loudspeaker is 66 dB. What is the rate at which sound energy is produced by the loudspeaker, assuming it to be an isotropic source? ____W Homework Equations ? Something to do with Intensity? The Attempt at a Solution I don't...

Homework Statement The Sun emits electromagnetic waves (including light) equally in all directions. The intensity of the waves at the Earth's upper atmosphere is 1.4 kW/m2. At what rate does the Sun emit electromagnetic waves? (In other words, what is the power output?) ____ W Homework...

I have another quick question that you may be able to answer... The Sun emits electromagnetic waves (including light) equally in all directions. The intensity of the waves at the Earth's upper atmosphere is 1.4 kW/m2. At what rate does the Sun emit electromagnetic waves? (In other words, what...

Yea thank you so much for your help! I was doing my math wrong a few times and that's where i got confused. I was doing 2piR instead of pi R^2.

so it is the area of jupiter? and is it assumed that we know the radius of Jupiter to figure out the problem?

does this depend on the area of Earth and jupiter?

Homework Statement The intensity of sunlight that reaches the Earth's atmosphere is about 1500 W/m2. What is the intensity of the sunlight that reaches Jupiter? Jupiter is 5.4 times as far from the sun as Earth. [Hint: Treat the Sun as an isotropic source of light waves.] ____ W/m2...

Homework Statement A clock has a pendulum that performs one full swing every 1.2 s (back and forth). The object at the end of the pendulum weighs 12.0 N. What is the length of the pendulum? ____ m Homework Equations ?? The Attempt at a Solution What is the equation i would use...

Homework Statement An ideal spring has a spring constant k = 29 N/m. The spring is suspended vertically. A 1.4 kg body is attached to the unstretched spring and released. It then performs oscillations. (a) What is the magnitude of the acceleration of the body when the extension of the...

got it.. thanks everyone for the help!

ahh i just was not converting right thanks for the help!