What does it mean that a form of energy might take more energy to harness than it provides? Are renewable resources always renewable, or can they become non-renewable? Why aren't renewable resources used for everything that we use energy for? Explain.
Planet a has three times the mass of planet b and the same radius. from this information, what can we conclude about the acceleration due to gravity at the surface of planet a compared to that at the surface of planet b?
Hence mass grows 3 times - g will grow 3 times as well
1. How many correct experiments do we need to disprove a theory? How many do we need to prove a theory? Explain. 2. A guidebook describes the rate of climb of a mountain trail as 120 meters per kilometer. How can you express this as a number with no units?
2. change the meters to kilometers;
120 m/km = .12 km/km = .12
or the kilometers to meters;
120 m/km = 120 m/1000m = .12
This sounds like its telling you how far you climb vertically (.12 km) for every 1 km that you walk along the slanted, winding trail.
The unitless number ".12" is usefull because now you can think of the rate of climb in any units you want. So you rise vertcally .12 miles for every mile you walk the trail, or you rise .12 ft for every foot you walk the trail, etc.
Which is an example of transforming potential energy to kinetic energy? Check all that apply. changing thermal energy to electrical energy changing chemical energy to thermal energy changing nuclear energy to radiant energy changing radiant energy to electrical energy changing mechanical energy to chemical energy
hope this helps you
(0.544881 mol C) × (12.01078 g C/mol) = 6.54445 g C
(4.91 g H2O) / (18.01532 g H2O/mol) × (2 mol H / 1 mol H2O) = 0.54509 mol H
(0.54509 mol H) × (1.007947 g H/mol) = 0.54942 g H
10 g total - 6.54445 g C - 0.54942 g H = 2.90613 g O
(2.90613 g O) / (15.99943 g O/mol) = 0.18164 mol O
Divide by the smallest number of moles:
(0.544881 mol C) / 0.18164 mol = 2.9998
(0.54509 mol H) / 0.18164 mol = 3.0009
(0.18164 mol O) / 0.18164 mol = 1.0000
Round to the nearest whole number to find the empirical formula:
-Some of the physical properties may be altered, but the chemical composition stays the same
-Examples: Bending, Crushing, Cutting, Melting, Freezing, Boiling
The difference between temperature and thermal energy is that temperature measures the average kinetic speed of molecule and thermal energy is the total kinetic energy of all particles in a given substance.
and since, V = IR
you also have
P = I^2 R P = V^2 / R
What information does the atomic mass of an element provide? A. the sum of electrons and protons in an atom B. the difference between the number of protons and electrons C. the number of protons and neutrons in an atom D. the number of isotopes
The atomic mass is the sum of the number of neutrons and protons.
What happens when the electron moves from the first energy level to the second energy level? Energy is absorbed, and an emission line is produced. Energy is released, and an emission line is produced. Energy is absorbed by the atom. Energy is lost from the atom.
Emission lines occur only in the case of transitions from higher to lower energy levels in which energy is emitted.
PLEASE HELP FAST??!! Which statement is true about the electromagnetic spectrum? A. The visible Spectrum includes radio waves, light and gamma rays. B. Same wave lengths of light corresponding to different colors. C. It contains a spectrum of visible light plus a wide array of nonvisible forms of radiation. D. The waves travel at a speed of 2.998 *10^5 m/s
The electromagnetic spectrum contains visible light along with many other components such as radio waves, microwaves, ultraviolet rays and gamma rays.
The water has potential energy when it is at the top of the falls which is converted into kinetic energy as it falls.
Which of the following is true of both nuclear fusion and nuclear fission? a. They both require a high energy input. b. They both occur without byproducts. c. They both have a high energy output. d. They both involve large atoms breaking into smaller atoms.
Both processes release tremendous amounts of energy.
B. Greater energy
Fast moving water is very energetic as its can displace very large rocks, boulders and make pebbles and sand out of them through the process r erosion. Fast moving water have kinetic energy, it opposes anything that come in its way. As river make its own channel by eroding plane. Many antecedent rivers have make their channel by cutting large mountains too.
For this case, there are two strategies that Casey can use for the exam.
1) Make a form: This technique consists of compiling the most important formulas found in the book and writing them on a single page. Then, when Casey must use a formula in the exam, it is easier for her to look in the sheet where she wrote the formulas.
2) Highlight formulas: This technique consists of using a highlighter to highlight the most important formulas in the book. So when Casey should look for a formula in the book, she should not read the whole text. She should only read the highlighted text.
The space shuttle travels at about 28,000 km per hour. Using that information, estimate how many hours it will take the shuttle to reach Saturn from Earth. Show your work. Convert your answer into scientific notation if necessary.
s = 1 275 000 000 km
The time required to travel that distance is:
t = s/v = 45535 hours or 1897.3 days
When an electric current is passed through water during the process of electrolysis, two gases are formed. One gas has a boiling point of -183 degrees celsius and the other has a boiling point of -253 degrees celsius. Has a physical change or a chemical change occurred? Explain.
your question is incomplete, please consider revising it.
I Think It Is Wave And BioMass