An engineer drops a penny into a wishing well and measures the time for the sound or a splash to return a. Without considering the speed of sound, how far is the water surface if the sound returns after 2 s. b. What about if the speed of sound is 332 m/s

1) If the speed of sound @ 20°C is 343 m/s, what is that equivalent to in miles per hour? CON Vert

1. Answer question throughly with detailed steps since I don’t understand the problem.

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2. The position of a drone as a function of time is given by *(t) = ( 8 i + 1.5 k) + (-3 î + 2 j) t – 0.5 t2 j The units are missing in the constant coefficients above, i.e., "0.5" should be "0.5 m/s2". Include the correct units on all the constant coefficients in your answers below. a. What is the x-position of the drone as a function of time? b. What is the y-position of the drone as a function of time? c. How far away is the drone from its starting position at t = 3s? d. What is the acceleration vector? е. What is the velocity vector as a function of time? (One way to do this is to take the time derivative of the position vector.) f. Make a sketch of the x, y, and z positions of the drone as function of time. You just need the general shape. time time time

A stone is dropped into a well and 4.5 seconds later the sound of the splash is heard. Then asecond stone is thrown downward into the well with an initial velocity Vo and the sound of thesplash is heard in 4 seconds. If the velocity of sound is constant at 1120 fps, determine the initialvelocity of the second stone.a. Identify the type of motion defined in the problem. b. Set up the equations of motion that is required to solve the problem. c. Solve for the unknown variables by substituting the given in the equations of motionthat has been set up previously.

How LONG will it take a ship traveling at a constant velocity of 100 m/s to travel 800 meters?   a. 8 seconds.   b. 20 seconds.   c. 50 seconds.   d. 4 seconds.

6. A train is moving with a constant speed. The train moves 60 meters for every 1.5 seconds that elapses. a. Assume that we get 40 by dividing 60 by 1.5. What is the name that is commonly given to a quantity represented by this number 40? b. To denote the quantity completely, what additional information must be given besides the number 40? c. How would you interpret the number 40 in this instance? Your answer should mention distance and time. d. Use your interpretation (not algebra) to find the distance the train moves in 2.5 seconds.

9.  Tectonic plates are large segments of the Earth’s crust that move slowly. Suppose that one such plate has an average speed of 4.0 cm/year. (a) What distance does it move in 1 s at this speed? (b) What is its speed in kilometers per million years?   15.  (a) Suppose that a person has an average heart rate of 72.0 beats/min. How many beats does he or she have in 2.0 y? (b) In 2.00 y? (c) In 2.000 y?   19.  (a) If your speedometer has an uncertainty of 2.0km/hsize 12{2 "." 0" km/h"} {} at a speed of 90km/hsize 12{"90"" km/h"} {}, what is the percent uncertainty? (b) If it has the same percent uncertainty when it reads 60km/hsize 12{"60"" km/h"} {}, what is the range of speeds you could be going?

In the past, ships often carried small cannons that were used when approaching shore in dense fog to estimate the distance to the hidden land. Explain how this might have been done.