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1. Mass Defect of 7Li Nuclues

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...
3. Compound Microscope

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...
4. Prism Optics Range of Refraction Angles

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...
5. Average Current in Coil Rotated in Magnetic Field

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...
6. Monatomic Gas and Isotherm - W, U Calculations

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...
7. Vertebrate and Number of Breaths - Ideal Gases

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...
8. Percentage Change in Sound Intensity - Help

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...
9. Sound Intensity Problem of 3 Machines

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...
10. Chirping Bat and Distance to Moth - Sound Waves

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...
11. Change in density of water with depth

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 = -...
12. Pressure Difference to Make Blood Flow Thru Artery

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 =...
13. Blood Pressure Difference between Aorta and Aneurysym

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...
14. Decrease in Pressure Above a Lake

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...
15. Blood pressure to make Blood Flow Thru Artery

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...
16. Mountain Climber Rope Tension

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...
17. Determine average force applied by glove to baseball

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...
18. Elastic Energy of Tendon

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...