A roast is taken from the refrigerator (where the temperature is 40 degree F) and put in a 350 degree F. One hour later, the meat thermometer shows a temperature of 90 degree F. If the roast is done when its temperature reaches 140 degree F, what is the total time the roast should be in the oven?Newton's Law of cooling says that the rate of change of temperature is proportional to the difference between the temperature of the object and the temperature of the surrounding air.

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?

Two manned satellites approaching one another at a relative speed of 0.550 m/s intend to dock. the first has a mass of 2.50 ✕ 103 kg, and the second a mass of 7.50 ✕ 103 kg. assume that the positive direction is directed from the second satellite towards the first satellite. (a) calculate the final velocity after docking, in the frame of reference in which the first satellite was originally at rest.(b) what is the loss of kinetic energy in this inelastic collision? (c) repeat both parts, in the frame of reference in which the second satellite was originally at rest. final velocity(d) loss of kinetic energy = ?

The particles that are found in the nucleus of an atom are