Scientists describe any substance that shatters or breaks easily as being

A ball is thrown directly downward with an initial speed of 8.00 m/s, from a height of 30.0m. After what time interval does it strike the ground?

a custodian pulls a vacuum 13.5 m with a 33.9 N force at a 55.0 degree angle, against a 14.2 N friction force. find the work done by the friction force

How do I convert from mi/hr to m/s?

Find the velocity, acceleration, and speed of a particle with the given position function. r (t) = t i + t2 j + 2 k v (t) = Incorrect: Your answer is incorrect. a (t) = Incorrect: Your answer is incorrect.

Let v (t) = t^2-3t be the velocity, in feet per second, of an object at time t, in seconds. a) What is the initial velocity? ___ ft/sec b) When does the object have a velocity of zero?

A tube, open at only one end, is cut into two shorter (nonequal) lengths. The piece that is open at both ends has a fundamental frequency of 422 Hz, while the piece open only at one end has a fundamental frequency of 666 Hz.

Table tennis the path of a table-tennis ball after being hit and hitting the surface of the table can be modeled by the function h=-4.9t (t-0.42) where h is the height in meters above the table and t is the time in seconds.

A coat rack weighs 65.0 lbs when it is filled with winter coats and 40.0 lbs when it is empty. The base of the coat rack has an area of 452.4 in2.

An initially stationary object experiences an acceleration of 6 m/s2 for a time of 15 s. How far will it travel during that time?

How was helium first discovered? mining of the radioactive element uranium using spectral analysis of the Suns' emission spectra o hubble obtaining samples from explosions off the surface of the sun deep sea mining off the coast of Texas