Major-league pitcher can throw a baseball
A major-league pitcher can throw a baseball in excess of 40.8 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches the catcher who is 17.4 m away from the point of release?
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Suppose that two balls of mass 2.5 x 10^-4 kg each carry equal charges and are suspended by identical threads of length 13 cm anchored 24cm apart. If each thread makes and angle of 20 degrees with the vertical, what is the charge on each ball?
In the instructor's answer book for a mathematics text, 8% of the answers are incorrect. Use the Poisson approximation to express the probability that there are exactly 2 incorrect answers for a homework set with 50 problems.
The iron block eventually reaches thermal equilibrium with the lake water. Assuming an average specific heat of 0.45 kJ/(kg-K) for the iron, determine the entropy change of the iron block?
The activation energy for a reaction is changed from 241 kJ/molto 55.5 kJ/molat 641 K by the introduction ofa catalyst. If the uncatalyzed reaction takesabout 2890 years to occur, about how long will the catalyzed reaction take?
In a certain town, 70 % people support the construction of a new ballpark. If 5 people are randomly selected, what is the probability exactly 2 of them supported it?
What is the heat transfer rate through conduction in Watts. The walls are 9 ft hight and the room has the dimension of 16 ft by 19 feet and the walls.
The following summary table presents the results from a repeated-measures ANOVA comparing three treatment conditions, each with a sample of n = 12 participants. Fill in the missing values in the table. (Hint: start with the df values)
If the surface of the tower is normally kept at 23 Celcius at night and has a emissivity of 0.64, what is the amount of heat loss due to radiation?
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