Physics

If a book is moved around the edge of a table (physics help)

If a book is moved across the edge of a table and ends up at its initial position, its displacement would be zero, right?Because it started and ended at the same place?-Correct! Distance is a measure

Physics homework problem. polar bear on ice.

A polar bear of mass 510 kg is floating on an iceberg in the ocean. As the ice melts, how small can the iceberg get before the bear gets wet feet? (Your answer should be the volume of the iceberg).

Need help with a physics problem (displacement and velocity)

We just started this new chapter on displacement and velocity and Im already a little lost.This is the problem: Heather and Matthew walk eastward with a speed of 0.98 m/s.If it takes them 34 min. to

Physics Question! easy points!

Calculate the instantaneous speed (m/s) at the 10-second mark for a car that accelerates at 2 m/s^2 from a position of rest. Best explanation of answer gets easy points!!! Thank you in advance-The eq

Calculate the instantaneous speed and distance fallen for an object that falls freely from rest for 15 seconds

please explaIN-t= 15; u=0; a=g v =u +at v = 0 + 9.81 * 15 = 147.15 m/s answerinstantaneous speed s=ut + 0.5 at^2 s = 0 + 0.5 * 9.81 * 15^2 = 1103.625m answer distance fallen-v = u + at v = 0 +g(15)

Balloon Drop Physics problem

Roger sees water balloons fall past his window. He notices that each balloon strikes the sidewalk 0.84s after passing his window. Rogers room is on the fourth floor, 20mabove the sidewalk. A. How fas

Relativity and quantum gravity

Hello 5 stars if someone answer well and extended explaining the circumstances where general relativity and quantum gravity depart from Newton’s theory, giving one example of an effect or prediction f

If atoms are not solid, then why is most things solid

i punch the wall and OUCH it hurts! damn those fake atoms!-The atoms are moving much slower than those of water or gas.So not moving as fast makes them allot more solid.If you keep punching you will c

Could I get some help with this friction problem please

Here is the problem: http://i55.tinypic.com/5zpjbb.jpg If blocks A and B of mass 10 kg and 4 kg, respectively, are placed on the inclined plane and released, determine the force developed in the link.

What is this frequency of this sound wave

The period of this sound wave is 0.02 seconds (1/50th of a second). Show that the frequency of the sound produced is 100Hz. Is there a mistake with this question? Especially where it says 100Hz.-The f

Questions regarding an electron trapped in an infinitely deep potential well of width 0.500 nm

An electron is trapped in an infinitely deep potential well of width 0.500 nm. 1. If the electron is in its ground state, draw a careful diagram to show the probability function for the electron. (Wo

Which combinations of colours produce white light

+ What do you call such combinations? Thanks! I mostly just need to the second question but the first one would help me as well-Complementary colours-white light is made up of all visible wavelength

Physics Stop light problem

An inattentive driver is traveling 20.0 m/s when he notices a red light ahead. His car is capable of decelerating at a rate of 3.33 m/s^2 . If it takes him 0.250sto get the brakes on and he is 78.0mf

Are things heavier when they are hot or cold? Why

Strictly, and I mean super super super de duper strictly speaking,an object will be heavier when it is hotter.But this will not be by any means you can practically measure. Even if you do not change

Physics help? Can't figure it out

When two vectors sum to zero, how must they be related? 1. The magnitudes are different; the directions are opposite. 2. The magnitudes are the same; the directions are opposite. 3. Both magnitude and