Homework Statement
What is the mass defect of the 7Li nucleus (A = 7)?
Homework Equations
mass of 7Li nucleus per atomic table is 7.016004 u
N = A-Z or #neutrons = 7-3 = 4
computed mass of proton and neutrons in nucleus = 3 p*mass of p + 4n *mass of n
mass of proton = 1.00726 u
mass of...
Homework Statement
Roger in ship offshore listening to baseball game on his radio. He notices there is destructive interference when seaplanes from nearby Coast Guard station fly directly overhead at elevations of 777 m, 970 m, and 1163 m. The broadcast station is 98 km away. Assume there is...
Homework Statement
A microscope has an eyepiece that gives an angular magnification of 5.25 cm for a final image at infinity and an objective lens of focal length 1.45 cm. The tube length is 16.1 cm.
a - What is the transverse magnification due to the objective lens alone?
b - what is the...
Homework Statement
Equilateral triangle prism (angles all 60 degrees) made of crown glass. Index of refraction ranges from 1.486 for longest visible wavelengths to 1.556 for the shortest. What is range of refraction angles for the light transmitted into air through the right side of the...
Homework Statement
A circular conducting coil of radius 2.8 cm is placed in a uniform magnetic field of .900 T with the plane of the coil perpendicular to magnetic field. Coil rotated 180 degrees about the axis in .222 seconds. If the coil is made of copper with a diameter of .900 mm, what...
Homework Statement
. Suppose a monatomic ideal gas is changed from state A to state D by one of the processes shown on the PV diagram below, in which each interval on the vertical (P) axis corresponds to 2 atm, and the values of the lines on the horizontal (V) axis equal 1 L, 2 L, and 4 L...
Homework Statement
The volume of air taken in by warmblooeded vertebrate is 250 L/day at standard temperatutre and pressure (0 Degrees C and 1 atm). If air in lungs is at 43 degrees C under pressure of 440 mm HG and we assume vertebrate takes in average volume of 100cm cubed per breath at...
Homework Statement
An intensity level change of +2.00 dB corresponds to what percentage change in intensity!
Homework Equations
B = dB = 10 log (I/Io)
The Attempt at a Solution
2.00 dB = 10 log (I/Io)
0.2 = log (I/Io)
I/Io = 10e0.2 = 1.585
Assuming Io = 1, then percentage...
Homework Statement
In a factory, 3 machines produce noise with intensity levels of 76 dB, 82 dB, and 85 dB. With all three running, what is the intensity level?
Homework Equations
B = 10 log (I/Io)
The Attempt at a Solution
B = 10 log (10e7.6 + 10e8.2 + 10e8.5)
I do not know...
Homework Statement
A bat emits a chirping sounds of frequency 67 kHz while hunting for moths to eat. Suppose the bat emits a chirp that lasts for 1.00 ms adn then is silent while it listens for the echo. If the beginning of the echo returns just after the outgoing chirp is finished, how...
Homework Statement
By what percentage does the density of water increase at a depth of 3.7 km below the surface?
(change in p/p)
Homework Equations
P = pgh where p = density
p of water = 1000 kg/m cubed
h = 3.7 km = 3700 m
bulk modulus of water (b) = 2 e 9
The Attempt at a Solution
b = -...
Homework Statement
What is the pressure difference required to make blood flow through an artery of inner radius 2.0 mm and length 0.18 m at a speed of 5.6 cm/s?
Homework Equations
P1-P2 = Q8nL/pi*r fourth
or P1-P2 = velocity*8*viscosity of blood*L/rsquared
viscosity of blood = 4 x 10e-3
r =...
Homework Statement
Blood flowing thru aorta (radius 1.2 cm) enters aneurysym of radius 3.1 cm. How much on average is blood pressure higher inside the aneursym than the pressure in the unenlarged part of aorta? Average flow rate of blood thru aorta is 110 cm cubed/sec
Homework Equations
Q...
Homework Statement
What is the approximate decrease in pressure in going 31 m above the surface of the lake? Air at 20 degrees C has density of 1.2 kg/mcubed. The pressure at the surface of the lake is 104 kPa
Homework Equations
Pressure = F/Area
Force = density*area*height*g...
Homework Statement
What is the blook pressure difference required to make blood flow thru a capillary of radius 3.0 um and length 1.1 mm at a rate of 0.56 mm/s?
Homework Equations
P1 - P2 = ave speed (8nL) /r squared
The Attempt at a Solution
n of blood = 4 x 10 e-3 m/s
ave...
Homework Statement
A mountain climber is rappelling down a vertical wall. The rope attaches to a buckle strapped to the climber's waist 15 cm to the right of his center of gravity and makes an angle of θ = 23° with the wall. The climber weighs 616 N. The distance from his center of gravity to...
Homework Statement
A 0.15 kg baseball is pitched with a speed of 23 m/s. When the ball hits the catcher's glove the glove moves back by 0.044 m as it stops the ball. Assuming a constant acceleration of the ball, what was the average force applied by the catcher's glove?
Homework Equations
p...
Homework Statement
If the maximum tension in the Achilles tendon when the foot is sent down is 4.5 kN and the tendon's spring constant is 360 kN/M, calculate how much elastic energy is stored in it.
Homework Equations
F = kx
Hookes Law: Energy = 1/2*k*x squared
The Attempt at a Solution...