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Q1. Assuming biological substances are 98 percent water, estimate the masses of a cell with a diameter of 0.7 µm, a human kidney, and a fly. Take a kidney to be roughly a sphere with a radius of 5.0 cm and a fly to be roughly a cylinder 4.90 mm long and 2.50 mm in diameter.
Q2. A golf ball is struck with a five iron on level ground. It lands 90.80 m away 4.7 s later. What was the direction of the initial velocity? Give an angle counter clockwise relative to the horizontal.
Giancoli, page 30 --when they say that x-xo increases with the square of the initial speed. Why do they say square of initial speed only, what about square of final speed? And why do they ignore that the distance also decreases by a factor of 2.
The coefficient of expansion of iron and zinc
The sun falls on a concave mirror and forms an image 4.5 cm from the mirror. If an object 22 mm high is placed 12.7 cm from the mirror, where will its image be produced.
The angular momentum of the electron as it moves around the center of the circle is 1.40 × 10-25J•s.Find the radius of the circular path.
A good model for a radio antenna is a dipole. P1 is on the perpendicular bisector of the dipole, and P2 is along the axis of the dipole in the direction of dipole vector ˆp. P1 and P2 are both a distance 100m from the center of the dipole.
A particle has initial velocity 5 m/s due east and acceleration 2 m/s^2 due west. Find the distance traveled during 3rd second of the motion.
Sketch a principle ray diagram showing the formation of the image. compute the position, size, orientation (erect or inverted), and nature (real or virtual) of the image.
How close to the edge of the 28.0 kg table, that is 2.2m with legs 1.2m apart, can a 62.0 kg person sit without tipping it over.
You are driving home from school steadily at 80 for 150. It then begins to rain and you slow to 50. You arrive home after driving 3 hours and 20 minutes.
A 21 g bullet travelling at 255 m/s is fired into a 0.452 kg wooden block anchored to a 100 N/m spring. How far is spring compressed to the nearest thousandth of a meter.
What is phase change as the light is reflected from the top
A cube of ice is taken from the freezer at -8.4^circ C and positioned in a 114 g aluminium calorimeter filled with 322g of water at room temperature of 20.0 C. The final situation is observed to be all water at 15.0C.
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