Aball is thrown horizontally from the top of a upward to be in the y direction) and lands 121.8 m from the base of the building o n ce me the bathrown in the direction and (a) how long (ins) is the ball in the air (b) what must have been the initial horizontal component of the velocity (in m/s)? (indicate the direction with the sign of your answer.) (c) what is the vertical component of the velocity (in m/s) just before the ball hits the ground (indicate the direction with the sign of your answer.) (d) what is the velocity (in m/s) (including both the horizontal and vertical components) of the ball just before it hits the ground magnitude direction counterclockwise from the x-axis

Use the table to answer question 22 23 and 24.

Electroplating is a way to coat a complex metal object with a very thin (and hence inexpensive) layer of a precious metal, such as silver or gold. in essence the metal object is made the cathode of an electrolytic cell in which the precious metal cations are dissolved in aqueous solution. suppose a current of 480.ma is passed through an electroplating cell with an aqueous solution of agno3 in the cathode compartment for 46.0 seconds. calculate the mass of pure silver deposited on a metal object made into the cathode of the cell. round your answer to 3 significant digits. also, be sure your answer contains a unit symbol. ×10μ

Explain the difference between each pair of concepts. a. frequency and relative frequency b. percentage and relative frequency a. select the correct choice below. a. frequency is the total number of observations in a data set. relative frequency is the number of times a particular distinct value occurs. b. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of a value to the total number of observations. c. frequency is the total number of observations in a data set. relative frequency is the ratio of the number of times a particular distinct value occurs to the frequency. d. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of two different values.