Can i put stamps on the bottom of a lette

How can someone predict where light will go when it comes in contact with different types of transparent materials?

Does spilled milk have higher or lower entropy

I'm kinda confused, I understand what came first in the formation but how do we know which part came first in the formation of our solar system?

a hot metal bolt of mass 0.05 kg and specific heat capacity 889 joules per kg degree celsius is dropped into a calorimeter containing 0.15 kg water at 21 degrees celsius. the bolt and water resch a final temperature of 25 degrees celsius.

A thermometer reads 25∘C. If the temperature in the room is then increased by 16 K, what temperature will the thermometer read, in degrees Celsius?

Basic of Archimedes's principle of how fluid can make body to float and sink.

A bullet is accelerated down the barrel of a gun by hot gases produced in the combustion of gun powder. What is the average force (in N) exerted on a 0.0500 kg bullet to accelerate it to a speed of 625 m/s in a time of 1.10 ms (milliseconds)

Your boss at the Cut-Rate Cuckoo Clock Company wants to save money on materials. You are asked to reduce the balance wheel, which is cylindrical, dimensions to one-third their original values.

Which of the following conditions is not necessary to observe an interference pattern between two sets of waves? A) The waves must have the same wavelength. B) The waves must have a constant phase difference.

Calculate the change in velocity of 70 kg object being pulled with 1000N force force 10 s