Answer:
True - Archimedes Principle states that the buoyant force on an object is equal to the weight of the liquid displaced.
Answer:
Explanation:
Momentum is equal to mass times velocity in kg and m/s, respectively. Therefore,
p = 100(15) so
p = 1500 
Anything that has mass has weight and anything that has weight has mass simple.
The best answer is b) <span>Method 1 and Method 3
Method 2, which is part of every other options, does involve using extra water because the dishwasher will necessarily use extra water, even if it is full when you use it.
On the other hand, fixing leaky faucets requires no extra water and the recycled water used to wash your car has already been used. </span>
Answer:
1280 mg
Explanation:
Radioactive decay is a phenomenon that occurs when a certain isotope of an element, said to be radioactive, decays, turning into a lighter nucleus and emitting radiation + energy in the process.
The radioactive decay of this isotope of polonium is described by the equation
where
is the amount of polonium left after time t
is the amount of polonium t time t = 0
is the half-life of the polonium, in days (it is the time it takes for the initial element to halve its amount)
IN this problem, we know that:
After t = 560 days, the amount of polonium left is 
. Therefore, we can re-arrange the equation, substituting t = 560 d, and solve for to find the initial amount of polonium:
