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Minke whales (Balaenoptera acutorostrata) are relatively small baleen whales which feed on krill. Given the picture below and the information that whale is 6 m long, and has an average diameter of 1.0 m, form a model for the whale which allows you to estimate its mass. Select the answer closest to your estimate.
The number of radioactive nuclei in a particular sample reduces over a period of 10 d to one-sixteenth the original number. What is the half-life of these nuclei?
Speedboat A negotiates a curve whose radius is 150m. Speedboat B negotiates the curve whose radius is 190m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB of the speeds of boats.
two tanks are engaged in a training exercise on level ground. the first tank fires a paint-filled training round with a
It is difficult to understand where a majority of the numbers are derived from in step 3. First where was the 288R derived from? Secondly where was the 615.38 R derived from?
A sample containing beryllium (atomic mass 9 u), aluminum (27 u), and an unknown element is placed in a mass spectrometer. What is the mass of the unknown element
A helium ion (Q = +2e) whose mass is 6.6×10?27kg is accelerated by a voltage of 3700V, What is its speed? Express your answer to two significant figures and include the appropriate units
a carnot engine absorbs 53.2 kj as heat and exhausts 33.0 kj as heat in each cycle. calculate a the engines efficiency
a laser beam passes through a converging lens with a focal length of 19cm... at what distance past the lens has the
A 10-? reistor is connected to a 120-V ac power supply. What is the peak current through the resistor
Determine the magnitude of the force on an electron traveling 4.15×105m/s horizontally to the east in a vertically upward magnetic field of strength 0.37T
A slit of width 0.19mm is illuminated with monochromatic light of wavelength 632.8 nm. At what angle will the first minimum occur
A speeder is pulling directly away and increasing his distance from a police car that is moving at 25 m/s with respect to the ground. Find the speeder's speed with respect to the ground
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