Recent content by eagles12

I already have velocity, I am looking for speed

Homework Statement A typical Arteriole has a diameter of .030 mm and carries blood at the rate of 5.5* 10^-6 cm^3/s. What is the speed of the blood in an arteriole? Homework Equations s=P/vρ The Attempt at a Solution Blood is made of mostly water, so I used the same ρ as water...

but i don't know anything about the mercury other than the density, so how do i find the volume of the displaced mercury

For fluids in motion, how do I find speed using velocity and diameter or velocity and pressure? Like in a pipe or other cyllinder type thing

Homework Statement A piece of lead has the shape of a hockey puck, with a diameter of 7.5 cm and a height of 2.9 cm. If the puck is placed in a mercury bath, it floats. How deep below the surface of the mercury is the bottom of the lead puck? Homework Equations ρhg=13534 plead=11340...

Homework Statement A 72 kg person sits on a 4.0 kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.1 cm in diameter. Find the pressure exerted on the floor by each leg of the chair, assuming the weight is equally distributed. Homework Equations P=F/A...

Homework Statement A brother and sister try to communicate with a string tied between two tin cans. If the string is 9.5m long, has a mass of 55g and is pulled taut with tension 6N, how much time does it take for a wave to travel from one end of the string to the other? Homework Equations...

so it would be (27+343)/(12-343)*502 f=-561.15

Homework Statement A motorcyclist and a police car are moving toward one another. The police car emits a sound with frequency of 502 Hz and has a speed of 27m/s. The motorcycle has a speed of 12 m/s. What frequency does the motorcyclist hear? Homework Equations f=1/T f'=f(1+v/vs)...

Homework Statement Sound 1 has an intensity of 39.0 W/m^2. Sound 2 has an intensity level that is 2.5 dB greater than the intensity level of sound 1. What is the intensity of sound 2? Homework Equations I=energy/area*time β=(10dB) logI/Io Io=10^-12 W/m^2 The Attempt at a Solution...

Homework Statement If the string is mass 9.5 m long, has a mass of 55g and is pulled taut with a tension of 6N, how much time does it take for a wave to travel from one end of the string to the other? Homework Equations v=√(T/M) M=mass/length The Attempt at a Solution First I...

Homework Statement An Atwood's machine consists of two masses, m1 and m2, connected by a string that passes over a pulley. If the pulley is a disk of radius R and mass M, find the acceleration of the masses. Express your answers in terms of variables m1,m2, M, R, and appropriate constants...

I am still having trouble figuring out how to use the M (mass of the pulley) because i need it in my equation. i tried a=g m1-m2/m1+m2

Well i found that equation from a similar problem in my textbook and then altered it for my problem

Homework Statement An Atwood's machine consists of two masses, m1 and m2, connected by a string that passes over a pulley. If the pulley is a disk of radius R and mass M, find the acceleration of the masses. Express your answers in terms of variables m1,m2, M, R, and appropriate constants...