A silver piece of metal is thrown put into some water. Information on water
Mass of water= 1 kg
Initial Temperature of water = 295 K
Final Temperature of water =303 K
Cwater=4180 J/kg K
How many Joules of heat are added to the water?

Q = 33440 Joules.

Explanation:

Given the following data;

Mass of water= 1 kg

Initial Temperature of water = 295 K

Final Temperature of water =303 K

C of water=4180 J/kg K

To find the quantity of heat;

Heat capacity is given by the formula;

Where,

Q represents the heat capacity.

m represents the mass of an object.

c represents the specific heat capacity of water.

dt represents the change in temperature.

dt = T2 - T1

dt = 303 - 295

dt = 8K

Substituting into the equation, we have

Q = 1*4180*8

Q = 33440 Joules.

russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.

if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have

where is unknown. because the position is parabolic, there is symmetry about the midpoint at , and we know that

so that the position function is

which means the velocity is

then the total distance traveled is

so the total distance traveled is 20 m.

on the other hand, if you want to find displacement: the particle starts at and ends at , so its displacement is 0.

the answer is the index of refraction of the second medium is higher. i just took the test.