Sorry I'm late. Also sorry you couldn't handle any of this on your own.
There's not that much to it. If you ignore friction, then the total energy
is constant.
-- At the top, it's all potential energy, and kinetic energy is zero.
-- At the bottom, potential energy is zero and it's all kinetic energy.
-- Halfway down, it's half potential energy and half kinetic energy.
The real truth is that there's always some friction, friction robs kinetic
energy whenever he's moving, so eventually he stops going up and
down. Then he has to put some muscle energy into it to go some more.
Answer:A powder is an assembly of dry particles dispersed in air. If two different powders are mixed perfectly, theoretically, three types of powder.
Explanation:
Answer:
"Scientists used them to create new theories"
Explanation:
The Scientific Revolution was a sequence of actions that manifest the development of contemporary science through the early contemporary period, when advances in mathematics, physics, astronomy, biology and chemistry altered the opinions of civilization around nature. The scientific revolution denotes to the quick developments in European scientific, mathematical, and political assumed, grounded on a new philosophy of experimentation and a belief in growth that defined Europe in the 16th and 17th centuries.
Answer:
B
Explanation:
Millions of dollars have been made from those visitors.
Answer:
Machine used 392 MJ energy as mechanical energy.
Explanation:
Efficiency(e) is defined as the ratio of the work done by the machine to the energy provided to the machine.
.....(1)
The efficiency of the machine is also given by the relation :
.....(2)
Here T(low) and T(high) denotes the temperature in kelvin.
According to the problem, T(low) = 35⁰ C = 35 + 273 = 308 K
T(high) = 330⁰ C = 330 +273 = 603 K
Substitute the values of T(low) and T(high) in the equation (2).
e = 0.49
According to the problem, Energy Given = 800 MJ
Substitute the value of efficiency(e) and Energy Given in the equation (1).
Energy used = 0.49 x 800 MJ = 392 MJ