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.
In 2004 astronomers reported the discovery of a large Jupiter-sized planet orbiting very close to the star HD 179949 (hence the term "hot Jupiter"). The orbit was just 19 the distance of Mercury from our sun, and it takes the planet only 3.09 days to make one orbit (assumed to be circular). What is the mass of the star? Express your answer (a)in kilograms and (b)as a multiple of our sun's mass.
Use Kepler's 3rd Law
T^2 = k R^3
where k = 4(pi)^2/ GM
G =gravitational constant = 6.67300 × 10-11 m3 kg-1 s-2
M = mass of this new planet
pi = 3.14159265
T =3.09 days = 266976 seconds
R = (579,000,000km)/9 = 64333333.3 km
Solve Kepler's 3rd Law for M. Your answer will be in kg
mass of the sun = 1.98892 × 10^30 kilograms
Form the ratio
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
When a bullet is fired from a gun, what is true about the momentum? The gun has more momentum than the bullet, so the momentum is not conserved. The bullet and gun have equal momenta in opposite directions, so the system's momentum is conserved. The bullet has more momentum than the gun, so the momentum is not conserved. The bullet and the gun have equal momenta in the same direction, so the system's momentum is conserved.
Force times Mass equals Acceleration.
The answer is TRUE.
If the mass increases the number on the left side of the equation increases, thus increasing the right side as well.
Which statement is NOT true? a. water plays an important role in the control of body temperature b. water helps carry nutrients to cells and waste products away from cells c. people need a minimum of 10-12 glasses of water each day d. soups, fruits, vegetables, and meats are sources of water
All types of
Crystals can have all types of bonds between their atoms.
- Crystals are solid materials which contains atoms, molecules or ions that are arranged in a complex structure forming a crystal lattice.
- Crystals may have all types of bonds, these includes; ionic bonds, formed as a result of transfer between a metallic bond and a non-metal atom, Covalent bond, formed as a result of sharing electrons between non metal atoms, hydrogen bonds, metallic bonds Van der Waals bonds, etc.
hope this helps you
-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.
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.
1. Which of the following is NOT part of John Dalton's atomic theory? A. All elements are composed of atoms. B. All atoms of the same element have the same mass. C. Atoms contain subatomic particles. D. A compound contains atoms of more more than one element. 2. Who provided evidence for the existence of a nucleus in an atom? A. John Dalton B. J. J Thomson C. Democritus D. Ernest Rutherford
His theory did not incorporate the existence of subatomic particles.
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.
Consider the following geometric solids. A sphere with a ratio of surface area to volume equal to 0.08 m-1. A right circular cylinder with a ratio of surface area to volume equal to 2.1 m-1. What results would you expect if these two models were compared in a diffusion test? A. The rate of diffusion would be the same for the two models. B. The rate of diffusion would be faster for the right cylinder. C. The rate of diffusion would be slower for the right cylinder. D. The rate of diffusion would be faster for the sphere.
Before answering this question, first we have to understand the effect of ratio of surface area to volume on the rate of diffusion.
The rate of diffusion for a body having larger surface area as compared to the ratio of surface area to volume will be more than a body having less surface area. Mathematically it can written as-
V∝ R [ where v is the rate of diffusion and r is the ratio of surface area to volume]
As per the question,the ratio of surface area to volume for a sphere is given
The surface area to volume ratio for right circular cylinder is given
Hence, it is obvious that the ratio is more for right circular cylinder.As the rate diffusion is directly proportional to the surface area to volume ratio,hence rate of diffusion will be more for right circular cylinder.
Hence the correct option is B. The rate of diffusion would be faster for the right cylinder.
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.
1. In the circuit shown below, with each bulb holding a resistance of 100 ohms, how many amps of current are flowing? Express your number as a decimal. (See Figure) 2. Protons have positive charge, neutrons have negative charge, and electrons have no charge. A. True B. False 3. A complete electric circuit includes a voltage source, current, wires, and something to _________ the flow of current.
These are 3 questions and 3 answers.
Answer: I = 0.01 A
i) Type of circuit: series
ii) R₁ = 100 Ω
ii) R₂ = 100 Ω
iii) V = 2 V
iv) I = ?
i) Equivalent resistance, R = R₁ + R₂
ii) Ohm's law, V = IR
i) R = 100Ω + 100Ω = 200Ω
ii) I = V / R = 2 V / 200Ω = 0.01 A
The nuclear model of the atom states that the atom is neutral, and consists of a nucleus, which holds the protons and the neutrons, and the electrons which are around the nucleous (in regions called orbintals).
The electrons are negatively charged and the protons are positively charged.
The magnitudes of the charges of both electrons and protons are equal.
Therefore, for the atom be neutral, the neutrons cannot have charge.
Answer: oppose (or resist).
1) The most basic electrical circuit consists of a 1) potential difference (voltage) source, which gives the "impulse" to the charge to flow, 2) the wire, which is the medium through which the charge flows), and 3) a resistor.
The resistor is the element with "resistance" to the flow of charge, this is it resists or oppose the flow of charge.
Some components, like motors, filaments, buzzers, which content or are resistors per se, transform the current (flow of charge) in other useful forms of energy (motion, light, heat, sound).
The resistor meets Ohm's law which states R = V / I, at constant temperature.
your question is incomplete, please consider revising it.