a piece of stone with its volume 400cm³and density 7.8x10³kg/m³. calculate the weight of the stone in air and the upthrust of water.​

What is the relationship between the wavelength of a wave and it's energy?

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.

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.