A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 3.9 s later Part A If the speed of sound is 340 m/s, how high is the cliff? Express your answer using two significant figures. ΜΕ ΑΣΦ h= Submit Request Answer ?

A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 3.9 s later Part A If the speed of sound is 340 m/s, how high is the cliff? Express your answer using two significant figures. ΜΕ ΑΣΦ h= Submit Request Answer ?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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solving for b. Oil explorers often set off explosives to make loud sounds, then listen for the echoes from underground oil deposits. Geologists suspect that there is oil under 520-m-deep Lake Physics. It's known that Lake Physics rests on top of solid granite. The speed of sound in water is 1480 m/s and the speed of sound in granite is 6000 m/s. a. If an explosion is created at the surface of the lake, what time after the explosion do the explorers expect to hear an echo from the bottom of the lake in seconds? t bottom = 0.703 sec. b. In addition to the expected echo from the bottom of the lake, explorers also detect a faint echo 0.960 s after exploding the dynamite at the lake surface. If it's really oil, how deep will they have to drill through the granite to reach it in meters?
An osprey's call is a distinct whistle at 2200 Hz. An osprey calls while diving at you to drive you away from its nest. You hear the call at 2300 Hz. Part A How fast is the osprey approaching? Express your answer with the appropriate units. v= μA Value Units ?
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
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.
A weight is oscillating up and down on spring. It's displacement from rest is given by the function d(t)=sin6t-4cos6t, where d is in centimetres and t is time in seconds. a. what is the rate of change of the displacement after 1s b. Determine the maximum and minimum displacements and when they first occur.
You're driving down the highway late one night at 20 m/s when a deer steps onto the road 35 m in front of you. Your reaction time before stepping on the brakes is 0.50 s, and the maximum deceleration of your car is 10 m/s². Part A How much distance is between you and the deer when you come to a stop? Express your answer in meters. ΨΗ ΑΣΦ 340 EPPINE ? Previous Answers Request Answer Submit X Incorrect; Try Again. m 27
An object moves 60.0 m [E 75.0° N] and then 50.0 m [E 45.0° S].a. Determine the object’s total displacement using graphing scaled diagram.b. Determine the object’s total displacement using component methodc. Determine the object’s total displacement using sine and cosine law.
Question 4 A stretched string of length 50 cm is plucked a quarter of the way along its length to give an initial velocity of 10 m/s. Find expressions for the coefficients an and bn. a. an = 0 bn = 0 -0.5 b. an = 0.25 y(x,0) sin(kx)dx, b₁ = 0 4 0.5 = c. an = 0, bn foy(x,0) sin(kx) dx @n 4 -0.5 d. an = So y(x,0) sin(kx) dx, y(x,0)sin(kx)dx Wn b₁ =0.255 0
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15.C. Suppose that a car moves one-dimensionally along the x-axis and has position equation given by x = 15-2t², velocity equation v = -4t, and acceleration equation a = -4 all in the standard metric units. = a. Compute its position, velocity and acceleration at 2s b. If the positive direction of the axis is to the right, then state if the car is moving toward increasing position (right) or decreasing position (left) at 2s. c. Draw the car below and draw three vectors: position, velocity, and acceleration at 2s -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 →→→meter 6
A particle's acceleration is described by the function a = (10 -t) m/s², where t is in s. Its initial conditions are xo = 260 m and vox = 0 m/s at t = 0 s. Part A At what time is the velocity again zero? Express your answer with the appropriate units. t = Submit Part B Value x = Request Answer What is the particle's position at that time? Express your answer with the appropriate units. Units Value Units ?
A hypnotist's watch hanging from a chain swings back and forth every 0.84 s. What is the frequency (in Hz) of its oscillation? Hz