A 2.5 box that is sliding on a frictionless surface with a speed of 13 approaches a horizontal spring. The spring has a spring constant of 2100 N/m .(a) If… Click here to read more
Welcome to Physics Homework - Questions & Answers
This site was started back in 2008, and features, among others, a collection of physics homework exercises and tutorials for all levels of physics students (high school and college).
We hope our site will help you advance in your studies and make it easier to understand physics, hence the world that surrounds us!
All the contents of this site were written by Valentin Bogatu (Physics, PhD).
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During the Apollo lunar explorations of the late 1960s and early 1970s, the main section of the spaceship remained in orbit about the Moon with one astronaut in it while… Click here to read more
A radio antenna broadcasts a 1.0 MHz radio wave with 30 kW of power. Assume that the radiation is emitted uniformly in all directions What is the wave intensity 27… Click here to read more
What are the frequencies of the first four harmonics of middle C (261.6Hz)? Approximately how many times louder is a 110 dB sound than a 80 dB sound? a) $F1… Click here to read more