The heater in the thermostat control circuit in the cooling mode is active when the ____.
The stress force that causes a mass of rock to pull or twist in opposite directions is called shearing.
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Refrigeration compressors turn gases into high-pressure and -temperature gases, are also used to maintain a low boiling point.
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.
and since, V = IR
you also have
P = I^2 R P = V^2 / R
Which of the following might be considered a viable application of a radioactive tracer? It can be more then one? A) adding a stream of radioisotopes to waste water to examine where pollution goes when it flows into the ocean B) embedding a radioactive plug in a valuable necklace so that its location can be determined using a Geiger counter C) placing radioactive sources around a room to trace the location of people as they move through the room d.) filling a pipeline with radioactive gas to see if it contains any leaks
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.
Because cosmologists can't go out into space and test all of their theories, they must depend on the cosmological principle. This principle assumes that _____. the universe stays at a steady state any physical laws are the same for the entire universe the universe is going to eventually collapse the universe is cooling down
It can also be said that physical laws are the same for everybody at any place in universe.
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.
Answer : The correct option is, distance times force
Work : It is defined as the force acting on an object to cause a displacement. Or we can defined as the work is equal to the product of the force of an object and displacement of an object.
The formula of the work is written as,
W = work done
F = force applied on an object
d = displacement of an object
Hence, the work is equal to distance times force.
Which type of boundary is modeled? A. The formation of the Himalaya mountains? B. The formation of Greenland, a volcanic island country in northern Atlantic Ocean? (The types of boundaries there are is Transform, Divergent, Convergent)
Answer: The correct answer is pulses.
Wave is a disturbance which carries energy from one particle to another. Wave is a continuous disturbance.
Pulse is a single disturbance. It travels through one point to another.
Sound wave consists of rarefaction and compression. It need medium to travel.
In the circular wave, the particles move both parallel and perpendicular to the motion of the wave.
Therefore, all waves consist of a continuous series of the pulses.
By definition we have to:
dr / dt: rate of change of the position of an object with respect to time
Therefore, we know that in a position graph with respect to time, both variables are proportional.
The proportionality constant is the speed of the object.
Mathematically, this constant represents the slope of the line.
To calculate the velocity of an object, the slope of the position vs. time graph should be calculated.
Positive acceleration occurs when an object speeds up.
Acceleration is the rate of change in velocity per unit time:
where is the change in velocity while is the time interval. From the formula, we can understand that when is positive, so when the object is speeding up, the acceleration is positive; on the contrary, when is negative (so, when the object is slowing down), the acceleration is negative.
The correct answer to the question is : Electromagnetic induction.
Before going to answer this question, first we have to understand electromagnetic induction.
The electromagnetic induction is defined as the process of production of electric current in a coil due to the change of magnetic flux associated with it.
As per the question, the current is produced in a wire when it is allowed to move through magnetic field. The magnetic flux is changed due to the motion of the wire in the magnetic field, which in turn produces induced emf in the wire.
Hence, the correct answer is electromagnetic induction.
An explosion is an example of a detonation.
I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
The earth's differentiation and size were significant factors for life on Earth because Earth's composition and gravitational attraction _____. -keep the moon and sun in orbit -keep people grounded -helped to create and retain Earth's atmosphere -create and retain internal heat
The mole fraction of oxygen in dry air near sea level is 0.20948. The concentration of oxygen is __________ molecules per liter, assuming an atmospheric pressure of 739 torr and a temperature of 29.5°C A) 6.23 B) 0.00819 C) 4.93 × 1021 D) 3.75 × 1024 E) 5.07 × 1022
n sub air = ( 739 / 760 ) ( 1.000 ) / ( 0.08205 ) ( 28.5 + 273.2 )
n sub air = 0.03928 mol per L
R = universal gas constant = 0.08205 atm - L per mol - deg K
Find moles O2 per liter :
n sub O2 = ( y sub O2 ) ( n sub air )
n sub O2 = ( 0.20948 ) ( 0.03928 )
n sub O2 = 0.008228 moles O2 per L
Now apply Avogadro's Number to get the O2 molecules per liter :
N sub O2 = ( n sub O2 ) ( N sub AVO )
N sub O2 = ( 0.008228 ) ( 6.022 x 10^23 )
N sub O2 = 4.96 x 10^21 O2 molecules per liter
b) line spectra
The model of the atom as given by Rutherford was modified by Bohr. According to Rutherford's model, the electrons that orbit the nucleus electromagnetic radiation. As a result they lose energy and had to collapse into the nucleus, thereby making the atom unstable.
Bohr corrected that by proving that electrons revolve around the nucleus only in certain fixed orbits, with a specific energy. They can jump from one to another and lose or gain energy by emitting or absorbing energy in that process.
Electron cloud is the region where the electrons are most likely to occur. This was proposed by Schrodinger.
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Answer: Option (d) is the correct answer.
A layer of material that helps block the transfer of heat between the air inside and outside a building is called insulation.
As insulators are the conductors which do not allow the flow of charges easily or we can say that insulators resist the flow of charges.
Whereas an active solar system, a solar cell, and a heat exchanger are all good sources of transfer of heat as all these easily allow the flow of charges, that is why, heat gets transferred heat between the air inside and outside a building.