Apiece of copper at 10 °c is dropped into a glass of water at 35 °c. which statement is correct?

heat will flow from the copper to the water in the glass until both reach the same temperature.
heat will flow from the water in the glass to the copper until both reach the same temperature.
the final temperature of the water in the glass and the copper will be 10 °c.
the final temperature of the water in the glass and the copper will be 35 °c.

i know the answer is either a or b. i am 100% sure that c and d are incorrect.
i'm thinking the answer is b, but i need some reassurance.

Plss anybody know how to do this? ? i need the answers from a through d

Abeam of electrons with of wavelength of 7.5 x 10-6 m is incident on a pair of narrow rectangular slits separated by 0.75 mm. the resulting interference pattern is projected onto a screen 10.0 m from the slits. what is the separation of the interference maxima in the resulting interference pattern?

You and a friend (alex) are at a a tree-top adventure park .. . part of the course requires you to climb up a rope. you both climb the same rope in the same amount of time. however, the tension in the rope is greater when alex climbs. who did the most work? alex did - more tension means more force - more force means more work was done you did - less tension means less force - less force means more work was done to find the work done, the force exerted and distance moved are multiplied. a couch is moved twice before you are happy with its placement. the same force was used to move the couch both times. if more work is done the first time it is moved, what do you know about the distance it was moved? when more work was done, the couch was moved less. when more work was done, the couch was moved further. when more work was done, the couch wasn't moved at all. when more work was done, the couch was moved the same distance.