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...
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...
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...
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...