It happens all the time, but make sure you're hydrated enought so you don't get sick.
It depends what the weight reading was originally measuring. If it was measuring the weight of the experimenter and the rock they were holding, and the water is not being held by them, then the weight will decrease by the weight of the rock. If it was measuring the weight of the water into which the rock it dropped, then it will increase by the weight of the rock. If it was measuring the weight of something totally unrelated to the experiment, then dropping the rock will have no measurable effect on the reading of the weight. Context needs to be given for the weight reading for a proper answer to be given.
no
10.34
An old chestnut this one. Whilst in the boat, the anchor displaces its weight in water, when under the water and lying on the bottom, it only displaces its volume. As it is made from iron which is much denser than water, its volume is much less than the volume of water which equals its weight. So it will displace less water than before it is dropped.
The water flows over a water fall
All these actions produce waves. Musical instruments produce sounds waves in air. Dropping a pebble in water produces waves on the surface of the water.
Sedimentary rock is formed by suspended solids dropping to the bottom and building layers that will compress down under the weight of water and go hard after the water source has disappeared, and the moisture has evaporated out of the silt left behind.
yes it is a physical change !
It is called deposition.
Dropping a pencil in the water will produce ripples.
longitudinal wave
No. That is you dropping a pound or two of water weight and then gaining back that and more due to the drop in your metabolism from not eating for two days.