What is percent error in the students mass determination
A student uses a balance to determine the mass of an object as 12.28 grams. The correct mass of the object is 12.45 grams. What is percent error in the student's mass determination?
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A supply plane needs to drop a package of food to scientists working on a glacier in Greenland. The plane flies 158 m above the glacier at a speed of 169 m/s. How far short of the target should it drop the package?
An experimenter has prepared a drug dosge level that she claims will induce sleep for 80% of the people suffering from insomnia. After examining the dosage, we feel that her claim regarding the effectiveness of the dosage is inflated.
How many grams of PBr5 is formed from 31.0 grams of phosphorus and 154 mL of bromine? Density of Br2 = 3.12 g/ ml? How many grams of the excess reactant will be left over?"
King Arthur's knights fire a cannon from the top of the castle wall. The cannonball is fired at a speed of 42 m/s and an angle of 26°. A cannonball that was accidentally dropped hits the moat below in 1.2 s. How far from the castle wall does t
When given a molecule, how do you draw the Fisher projection? How do you know which atoms (or groups) should go back and come out?
A rocket launched vertically upward is being monitored by a radar located at a distance 1.2 km from the launch pad. Compute the velocity and acceleration vector at this position.
A piggy bank contains one penny, one nickel, one dime, and one quarter. It is shaken until two coins fall out at random. What is the probability that at least $0.30 fall out?
Suppose an astronomer decides he wants to know the average orbital speed of Eris the dwarf planet. Using mechanical and astrophysical theories as well as observations, he determines that is average orbital speed is 3.32 ± 0.221 km/s.
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