The label has been scratched off a tuning fork and you need to know its frequency. from its size, you suspect that it is somewhere around 250 hz. you find a 250-hz tuning fork and a 270-hz tuning fork. when you strike the 250-hz fork and the fork of unknown frequency, a beat frequency of 5 hz is produced. when you strike the unknown with the 270-hz fork, the beat frequency is 15 hz. what is the unknown frequency?

How many hydrogen (h) atoms are in one molecule of sulfuric acid, h2so4? (1 points) 1 2 4 7

Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.

In a system, when potential energy decreases, then entropy also decreases. true false