A heat brick is heated and then allowed to cool. In 2 hours, the brick transfers 82000J of energy to the surroundings.
The mass of the brick is 2kg.
The specific heat capacity of the brick is 600 J/kg°C.
The brick is heated to an initial temperature of 150°C.
Calculate the temperature of the brick after 2 hours.

(Include working out)

Imagine that you have two balloons (or, better yet, actually inflate two balloons, if possible). create static electricity around one of the balloons by rubbing it against your hair or your sweater and then bring that balloon close to the other balloon, which has not been charged. try this with at least one other object—and for variety in the discussion, avoid using an object already described by your classmates. then, for your initial post to the discussion, answer the following questions: what happened with the two balloons?

What causes the formation of ocean currents?

The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?