100g of water (specific heat=4.184j/g*c) and 100g of a metal sample (specific heat= 0.397j/g*c) are heated from 25c to 75c. which substance required more thermal energy to reach 75c? (explain your reasoning).

An airplane flies eastward and always accelerates at a constant rate. at one position along its path it has a velocity of 34.3 m/s, it then flies a further distance of 40100 m and afterwards its velocity is 47.5 m/s. find the airplane\'s acceleration and calculate how much time elapses while the airplane covers those 40100 m.

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

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?