Answer:
Explanation:
Part One
Current = 0.6 amps
Voltage = 12 volts
R = ?
R = E / I
R = 12/0.6
R = 20 ohms
Part 2
Rt = Rspeaker + R
Rt = 20 ohms
R = 4 ohms
Formula
Rt = Rspeaker + R
20 = Rspeaker + 4 Subtract 4 from both sides
Rspeaker = 16 ohms
Part 3
Rspeaker = 16 ohms
I = 0.6 ohms
E = 0.6 * 16
E = 9.6
A certain light wave has a frequency of 4. 29 x 10 14 squared hz. What is the wavelength of this wave in the water
Answer: 5.26 x 10 -7 squared m
Explanation: I did the CK12 assignment :)
True of false. Red stars are hotter than blue stars.
Answer:
False
Explanation:
Blue stars are hotter than red stars
think of a working flame on a bunsen burner
carbon-14 is used to date a palm fossil that originally contained 0.24 grams of carbon-14. The half life is 5700 years. If the fossil is found to be 17,000 years old, how much Carbon-14 does it contain now?
Answer:
Exactly 0.03042 carbon-14 is remaining.
Roughly 0.03 Carbon-14 is remaining. (When/If Multiple Choice)
Explanation:
Not a physics question, this is chemistry, but I'll answer.
First, divide 17,000/5700 to find the t, or time.
t = 2.98245614 or 2.98.
If it originally contained .24 grams, and a half life means x/2,
you would use the formula x/2^p, with p being the number of half lives
(these variables are made up, you can use any you would like)
In 17,000 years, the palm fossil experienced 2.98 half lives.
Thus meaning, using our equation, we would find (.24)/2^2.98
This equals 0.030418784 carbon-14 remaining to be exact.
(For Multiple Choice, it may be required to round to For Multiple Choice, it may be required to round to 3, so .24/2/2/2 or .24/2=.12 then .06 then it equals : .03 Carbon-14)
This country has become an attractive manufacturing location for semiconductors because of the number of manufacturing plants in the country and availability of workers skilled in semiconductor production.
This country has become an attractive manufacturing location because of availability of workers skilled in semiconductor production is True.
What is Production?This involves the process of conversion of raw materials into finished products.
It involves the factors of production which is why the country became an attractive manufacturing location for semiconductors because of the number of manufacturing plants in the country and availability of workers skilled in semiconductor production.
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One car of mass 1,765 kg is travelling at a speed of 28 m/s. This car runs into another car that is at rest and they stick together. The resulting wreck is moving at a speed of 10 m/s. What is the mass of the car that was originally at rest?
Answer:
3177 kg
Explanation:
Conservation of momentum
momentum = mv this will be the same before and after the wreck
1765 * 28 = 49420 kg - m/s
After, it will be the same
(1765 + m2) 10 = 49420
m2 = 3177 kg
A point charge of +3.0 × 10–6 C experiences a force of
2.5 N. What is the electric field strength at the
location of the point charge?
Answer:
How far from a point charge of +2.4x 10-6C must a test charge be placed to measure a field of 360 N/C? E-AV = 400 V = 2X104 N/C d =( 0.020 m 7.)
Explanation:
Which has the greatest atomic mass?
Sulfur (S), Silicon (Si). Bromine (Br). Phosphorus (P)
Answer:
Bromine
Explanation:
Bromine has an atomic mass of 79.904 which is greater than all the other ones.
How many atoms are there in 0,23 g Na?
Answer:
There are 6.02*10^23 atoms in each mole (Avagadro no.) That is x moles * avagadro no. According to that, in 23 grams of sodium we have 6.02*10^23 atoms of Na.
Explanation:
One way to produce a beam of polarized light with intensity I and polarization angle θ would be to pass unpolarized light with intensity I0 through a polarizer whose transmission axis is oriented such that θTA=θ. How large must I0 be if the transmitted light is to have intensity I?(Figure 3)
Express your answer as a decimal number times the symbol I. For example, if I0=(1/4)I, enter 0. 25 * I
Polarization of light is achieved by passing the light through a polarizer which causes the light to vibrate in only one direction.
What is polarization of light?The question is unclear but I will try to explain what is meant by polarization of light. We know that light is an electromagetic wave and vibrates in all directions.
The polarization of light enables light to vibrate in a specified direction. This is achieved by passing the light through a polarizer which causes the light to vibrate in only one direction.
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This is for physical science i don't understand (please help) i need an answer by 11:40
Answer: 1.4mi/hr²
Explanation:
Blank 1: We know that acceleration is the change in velocity/change in time
Using this, we know that the acceleration will be: (50-15)/25 = 1.4
Blank 2: mi/hr²
describe why the bottom of cooking pans are painted black while interior is silver color
Explanation:
The bottom part of the cooking utensil or pan is painted black. The reason is that the black surface absorbs more heat and so the contents of utensil or pan get cooked rapidly if its bottom part is painted black.
Hence, by having black bottom and shiny inner surface we can utilise the maximum heat given to the utensil.
In order for a ball to move upward, the initial velocity of the ball must be greater than _____.
Answer:
The answer is zero please Give me Brainly
Explanation:
How many times a minute does a boat bob up and down on ocean waves that have a wavelength of 40 m and a
propagation speed of 5 m/s?
v=λf
f=v/λ
f=5 m/s : 40 m
f=0.125/s = 7.5/min
A student examining a flashlight observes that it uses a traditional incandescent light bulb. The power rating of the bulb is 60 W, and the bulb is connected to 36 V. What is the current moving through the bulb?
The current moving through the traditional incandescent light bulb in the examined flashlight is 1.67A.
Electric PowerElectric power is simply the rate at which electrical energy is transferred by an electric circuit per unit time. It is equal to the voltage difference across the element multiplied by the current.
It can be expressed as;
P = V × I
Given the data in the question;
Power = 60WVotage V = 36VCurrent I = ?To determine the current moving through the bulb, we substitute our given values into the expression above.
P = V × I
60W = 36V × I
I = 60W / 36V
I = 1.67A
Therefore, the current moving through the light bulb is 1.67A.
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Which statement best describes the direction of heat flow by conduction between two samples of the same material? heat flows from faster molecules to slower molecules when they are near. Heat flows from faster molecules to slower molecules when they collide. Heat flows from slower molecules to faster molecules when they are near. Heat flows from slower molecules to faster molecules when they collide.
Answer:
B
Explanation:
The statement that best describes the direction of heat flow by conduction between two samples of the same material is that heat flows from faster molecules to slower molecules when they collide.
How does heat flow by conduction?Heat refers to the difference in temperature between two substances. Heat flows in the direction of an hot substance to cold.
However, in a hot substance, the particles move faster than that of a cold substance.
Therefore, the statement that best describes the direction of heat flow by conduction between two samples of the same material is that heat flows from faster molecules to slower molecules when they collide.
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#SPJ2
What would be the answer to question 3?(about Right ascension and declination)
Answer:
i thinks its last one or 2nd one
Difference between electrolytes and nonelectrolytes.
Answer:
Electrolytes are salts or molecules that ionize completely in solution. As a result, electrolyte solutions readily conduct electricity. Nonelectrolytes do not dissociate into ions in solution; nonelectrolyte solutions do not, therefore, conduct electricity
Explanation:
Answer:
Chemical compounds can be divided into two categories according to their ability to conduct electricity through their aqueous solution.
These two categories are electrolytes and nonelectrolytes.
Electrolytes are chemical compounds that can dissolve in water forming ions. These ions can conduct electricity through the solution. Thes include acids, base and salts
Nonelectrolytes are chemical compounds that do not conduct electricity when dissolved in water. This is because they do not form ions when dissolved in water. These include corbon containing compounds, fats & sugars.
The main difference between electrolytes and nonelectrolytes is that electrolytes can get ionized when dissolved in water whereas nonelectrolytes cannot get ionized when dissolved in water.
A tennis player can serve a tennis ball at approximately 2.0 m/s.
If the other player is 4.0 meters away from the server, how long
does it take the ball to reach the second player? Please show
your work in order to earn credit for this question.
Kinematic Equation which may help with this problem.
Formula: [tex]d=vt[/tex]
d = distancev = velocityt = timeSolving the QuestionWe're given:
v = 2.0 m/sd = 4.0 mSolve for t[tex]d=vt\\\\t=\dfrac{d}{v}[/tex]
⇒ Plug in the given values:
[tex]t=\dfrac{4.0}{2.0}\\\\t=2.0[/tex]
AnswerTherefore, it took 2.0 seconds for the ball to reach the second player.
If two different net forces are applied to the same object at different times, which one will cause the object to accelerate at a greater rate — the larger or smaller net force?
Answer:
The smaller net force :)
Explanation:
The second law shows that if you exert the same force on two objects of different mass, you will get different accelerations (changes in motion). The effect (acceleration) on the smaller mass will be greater (more noticeable).
If two different net forces are applied to the same object at different times, a smaller net force will cause the object to accelerate at a greater rate.
What is force?Force is defined as the push or pulls applied to the body. Sometimes it is used to change the shape, size, and direction of the body. Force is defined as the product of mass and acceleration. Its unit is Newton.
Newton's second rule states that if you apply the same force to two objects with different masses, the accelerations will be different. The impact will be larger on the smaller mass.
If two different net forces are applied to the same object at different times, a smaller net force will cause the object to accelerate at a greater rate.
Hence smaller rate is the correct answer.
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Light goes from material having a refractive index of n1 into a material with refractive index n2. If the refracted light is bent away from the normal, what can you conclude about the indices of refraction?.
For a material having a refractive index n1 and n2, we can say that
n1>n2
What can you conclude about the indices of refraction?.The bending of light when it flows through one transparent medium to another is known as refraction.
In conclusion, the refractive index of n1 will be greater than the refractive index n2, If the refracted light is bent away from the normal.
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According to Newton's third law, two objects interacting under a force (such as gravity) both feel the same force. If the planets pull on the Sun as much as the Sun pulls on the planets, why are we able to approximate the Sun as a fixed position when studying the planetary orbits?
Explanation:
That's because the Sun's acceleration is much smaller
A man has a 90 kg mass on Earth. If the moon has 1/6 of the gravity as the earth,
what is the mass of a 90 kg man on the moon?
A ball that has a mass of 0.25 kg spins in a circle at the end of a 1.6 m rope. the ball moves at a tangential speed of 12.2 m/s. what is the centripetal force acting on the ball? 1.9 n 23 n 59 n 93 n
The centripetal force acting on the ball will be 23.26 N.The direction of the centripetal force is always in the path of the center of the course.
What is centripetal force?The force needed to move a body in a curved way is understood as centripetal force. This is a force that can be sensed from both the fixed frame and the spinning body's frame of concern.
The given data in the problem is;
m is the mass of A ball = 0.25 kg
r is the radius of circle= 1.6 m rope
v is the tangential speed = 12.2 m/s
[tex]\rm F_C[/tex] is the centripetal force acting on the ball
The centripetal force is found as;
[tex]\rm F_C = \frac{mv^2}{r} \\\\ F_C = \frac{0.25 \times (12.2)^2}{1.6} \\\\ F_C=23.26\ N[/tex]
Hence the centripetal force acting on the ball will be 23.26 N.
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Answer:
(b)
Explanation:
23 N
Two parallel plates have an area of 0.188 m^2. How much charge must you place on them to create a 37000 N/C field between the plates? (The answer is *10^-8 C. Just fill in the number, not the power.)
The charge that must be placed between the two parallel plates with the given area, to create the magnetic field is 6.156 x 10⁻⁸ C.
Electric field created between the parallel plates
The electric field created between the parallel plates is calculated as follows;
E = (Q) / (A∈₀)
Q = EA∈₀
where;
E is electric field∈₀ is permitivity of free spaceA is areaCharge between the platesQ = 37000 x 0.188 x 8.85 x 10⁻¹²
Q = 6.156 x 10⁻⁸ C
Thus, the charge that must be placed between the two parallel plates with the given area, to create the magnetic field is 6.156 x 10⁻⁸ C.
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Answer:
6.156
Explanation:
acellus
Which non-mineral nutrients are essential in photosynthesis? (Select all that apply.) oxygen calcium hydrogen carbon
Answer:
carbón, hydrogen and oxygen
The non-mineral nutrients that are essential in photosynthesis will be oxygen and hydrogen.
What is photosynthesis ?The process through which green plants and certain other creatures manufacture nutrients from carbon dioxide and water using sunshine.
Plants need the green pigment chlorophyll to perform photosynthesis, which produces oxygen as a product.
The non-mineral nutrients that are essential in photosynthesis will be oxygen and hydrogen.
Hence oxygen and hydrogen are the correct non-mineral nutrients that are essential in photosynthesis
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Question 6
1 pts
A wave is very similar to a ski slope. When a surfer is at the top of wave,
potential energy is at maximum.
the voltage used by most households can be modeled by a sine function. The maximum voltge is 120 volts, and there are 60 cycles every second. Write an equation to represent the value of the voltage as it flows through the electric wires, where t is time in seconds
The required equation for the sine function can be written as; V = 120sin120πt
What is a sine function?A sine function is a regular repeating function. We know that the voltage is represented using a sine function of the general form V= V-o sin2πft
Hence;
f = 60 cycles per second
V-o = 120 volts
So from the values that we have stated above;
V = 120sin120πt
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What is a conclusion?
What type of foods do bodyguards eat give 5 examples
What is "special" about the special theory of relativity? It deals with motion at constant velocity and accelerated motion but excludes all other effects; in particular, it excludes gravity.
Answer:
Explanation:
The reason it is called the special theory of relativity is because it's a special case of the general theory of relativity. SR deals with uniform motion, where there is no acceleration. Spacetime in special relativity is flat, with no gravity or curvature. It is a spacetime with no gravity. On the other hand, GR deals with accelerating reference frames and curved spacetime.