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A stockroom worker pushes a small crate with a mass of 9.40 kg on a horizontal


surface at constant speed. The coefficient of kinetic friction between the crate and


the surface is 0.20. What horizontal force is required to maintain the motion?

Find these values.

a) ⌈ 3/4⌉

b) ⌊ 7/8⌋

c) ⌈−3/4⌉

d) ⌊−7/8⌋

e) ⌈3⌉

f ) ⌊−1⌋

g) ⌊ 1/2 + ⌈ 3/2⌉ ⌋

h) ⌊ 1/2 ⋅ ⌊ 5/2⌋ ⌋


A wave is modeled by the wave function y(x,t) = (0.51m) sin[(2π/7.9m)(x-(14.3m/s)t)]. What is the period of the wave?



Round your answer to 2 decimal places.


Pls do not forget the unit

What is the wavelength of the waves you create in a swimming pool if you splash your hand at a rate of 1.41 Hz and the waves propagate at a wave speed of 5.54 m/s?



Round your answer to 2 decimal places.


Pls do not forget the unit

A surface ocean wave has an amplitude of 0.60 m and the distance from trough to trough is 8.00 m. It moves at a constant wave speed of 1.50 m/s propagating in the positive x-direction. At t=0, the water displacement at x = 0 is zero, and vy is negative. Assuming the wave can be modeled as a sine wave, write a wave function to model the wave in 3 ways.

Pls do not forget the unit


A pendulum that has a period of 7.01 s and that is located where the acceleration due to gravity is 9.44 m/s2 is moved to a location where the acceleration due to gravity is 9.31 m/s2. What is its new period?


Round your answer to 5 decimal places.

Pls do not forget the unit


Find the frequency of a tuning fork that takes 5.15 ms to complete one oscillation.

Round your answer to 2 decimal places.

Pls do not forget the unit


If your heart rate is 182 beats per minute during strenuous exercise, what is the time per beat in units of seconds?


Pls do not forget the unit



Write a program that first reads in the name of an input file and then reads the input file using the file.readlines() method. The input file contains an unsorted list of number of seasons followed by the corresponding TV show. Your program should put the contents of the input file into a dictionary where the number of seasons are the keys, and a list of TV shows are the values (since multiple shows could have the same number of seasons).

Sort the dictionary by key (least to greatest) and output the results to a file named output_keys.txt. Separate multiple TV shows associated with the same key with a semicolon (;), ordering by appearance in the input file. Next, sort the dictionary by values (alphabetical order), and output the results to a file named output_titles.txt.


Write a program for sorting an array. Declare a single dimensional array and accept 5 integer values from the user. Then sort the input in ascending order and display the output.


In C# Windows form




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