Refraction occurs when light crosses the boundary between one material and another material. what is the primary cause for this refracting of light upon crossing a boundary?
When light from the Sun strikes the surface of the Earth, this light is absorbed by the ground. The ground, in turn, emits infrared light—which is actually invisible to human eyes—back into the air. What is the effect of this infrared light being released into the air from the ground? A. It makes the air brighter. B. It warms the air. C. It harms the ozone layer. D. It makes the air appear blue.
The inventor of a new machine claims that its actual mechanical advantage is 4. Literature on the machine reports its input distance is 81 meters and its output distance is 27 meters. Find the machine's ideal mechanical advantage, and determine whether the developer's claim could be true.
The ideal mechanical advantage (IMA) of the machine is 3. The developer's claim of an actual mechanical advantage (AMA) of 4 is higher than the calculated IMA, suggesting that some energy is lost to friction. Therefore, the claim is not true.
Explanation:The ideal mechanical advantage (IMA) of a machine is calculated by dividing the input distance by the output distance. In this case, the input distance is 81 meters and the output distance is 27 meters. Therefore, the IMA of the machine is 81/27 = 3.
The developer's claim of an actual mechanical advantage (AMA) of 4 is higher than the calculated IMA of 3. This suggests that some energy is lost to friction in the machine, reducing its efficiency and resulting in a lower AMA. Therefore, based on the calculated IMA, the developer's claim could not be true.
A speaker draws 2 amps of current when it is connected to a 16 volt source. What is the resistance of the speaker?
32 ohms
32 amps
8 amps
8 ohms
The resistance of the speaker is calculated using Ohm's law and the provided values of 16 volts and 2 amps, resulting in a resistance of 8 ohms. The correct answer is d) 8 ohms.
The resistance of the speaker can be found using Ohm's law, which states that voltage (V) is equal to the current (I) times the resistance (R), or V = IR.
Since we know that the speaker draws 2 amps of current and is connected to a 16-volt source, we can rearrange Ohm's law to solve for resistance (R) as follows: R = V / I. By plugging in the given values we have R = 16 V / 2 A, which equals 8 ohms. Therefore, the resistance of the speaker is 8 ohms.
Which of these is true about a magnetic field?
It has the same magnitude at every point.
It points in the same direction as it would make a compass point.
It has a magnitude at each point but no specific direction.
It has the same direction at every point.
wo objects attract each other with a gravitational force of 50 newtons from a given distance. If the distance between the two objects is increased by 5 times, what will be the changed force of attraction between them?
2 newtons
10 newtons
125 newtons
625 newton
the overall charge of the nucleus is _____
a. positive
b. negative
c. neutral
Taking into account the constitution of an atom, the correct answer is option a. the charge of the nucleus of the atom is positive.
Constitution of an atomThe smallest component of ordinary matter with the characteristics of a chemical element is an atom, which consists of a nucleus where neutrons and protons meet, and energy levels where electrons are located.
In other words, The protons and neutrons that constitute the atomic nucleus are located in the nucleus of the atom, while the orbitals, or peripheral region, is where the electrons are located.
The neutron is an electrically neutral subatomic particle, while the proton has a positive electrical charge. Electrons have a negative charge, and are attracted to protons through electromagnetic force.
Overall charge of nucleus of an atomIn summary, since in the center of the atom there are protons with a positive charge and neutrons with a neutral charge, the charge of the nucleus of the atom is positive.
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Three asteroids have exactly the same amount of mass. The distance from asteroid A to asteroid B is 300 km, the distance from asteroid B to C is 400 km, and the distance from C to A is 100 km. Between which two asteroids would the gravitational force be the largest?
A). Between asteroid A and B.
B). Between asteroid B and C.
C). Between asteroid C and A.
D). The gravitational force between each pair of asteroids would be the same.
A flock of geese is flying south for the winter. In order to maintain a “V” shape, each goose is flying at the same constant velocity. Which goose will have the most momentum?
A) the goose with the least mass
B) the goose with the most mass
C) the goose that is behind all the others
D) the goose at the front of the "V" leading the way of the other geese
A 90-g aluminum calorimeter contains 390 g of water at a temperature of 20C. Then a 160 g piece of metal, initially at 305C is added to the calorimeter. The metal, water, and calorimeter reach an equilibrium temperature of 32 C. What is the specific heat capacity of the metal? The specific heat capacity of aluminum is 910 J/kg ∙ K, and of water is 4190J/kg*K.
430 J/kg · K
470 J/kg · K
350 J/kg · K
310 J/kg · K
Answer:
470 J/Kg.K
Explanation:
Let c be the specific heat capacity of metal.
According to the principle of caloriemetry
Heat lost by the hot body = Heat gained by the cold body
Heat lost by the aluminium = Heat gained by metal + calorimeter
mass of Aluminium x specific heat of Aluminium x rise in temperature + mass of water x specific heat of water x rise in temperature = mass of metal x specific heat of metal x fall in temperature
0.09 x 910 x (32 - 20) + 0.390 x 4190 x (32 - 20) = 0.16 x c x (305 - 32)
982.8 + 19609.2 = 43.68 c
c = 471.4 J/Kg.K
c = 470 J/Kg.K (nearly)
Can the waves crashing against the beach begin without any initiating event
99 POINT QUESTION- Answer Marked Brainliest- PLEASE HELP
A car travels at a constant velocity of 20.0 meters/second for 15 seconds. What is the power of the car if the initial force applied to it was 95 newtons?
A. 6.5 × 10^2 watts
B. 1.3 × 10^3 watts
C. 2.6 × 10^3 watts
D. 1.9 × 10^3 watts
Hello!
I believe the answer is D) 1.9 × 10^3 watts.
I hope it helps!
What gas is released when you burn coal with high amounts of sulfur in it?
During a collision between a photon and an electron, there is conservation of
What is the kinetic energy of a 1500 kg object moving at a velocity of 10 m/s?
The kinetic energy of a 1500 kg object moving at a velocity of 10 m/s is 75000 Joules.
Explanation:The kinetic energy of an object can be calculated using the formula KE = 1/2 * mass * velocity^2. Plugging in the given values for the mass (1500 kg) and velocity (10 m/s):
KE = 1/2 * 1500 * (10)^2
Simplifying the equation:
KE = 1/2 * 1500 * 100
KE = 75000 J
Therefore, the kinetic energy of the object is 75000 Joules.
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Give one example when it might be important to know how much gravitational potential energy is stored by an object. Why is it important?
Answer:
I know this is super late but I have the answer and the screenshot
One example could be when an airplane is flying in the air the higher it is the more gravitational pull there is and if the engines are not working the airplane will come down at a faster speed. It is important to know this because this could cause lots of danger to people and everyone on the plane.
Explanation:
And there you go have a great day!
don't forget to reword this because then that would be plagiarism so goodluck!
Answer:
Bowling ball on a shelf.
Explanation:
Let's say you won a bowling competition and wanted to display the ball on top of a book case. After trying for a while, you finally get it to stay in place without rolling. You may think it'll stay, but that ball still has potential energy, meaning it could fall off and hurt someone.
If Star A and Star B have the same absolute magnitude, but Star A is brighter, what does that tell us?
Scientists can calculate the distance from the seismograph station to the focus using
a. the difference in arrival times of P and surface waves.
b. the difference in arrival times of P and S waves.
c. the difference in arrival times of S and surface waves.
d. None of the above.
i am a titan condemned by Zeus to support the heavens upon his shoulders;son of Iapetus and the nymph clymene; brother of Prometheus and Epimethius. Who am i?
Which company has experienced censorship in China?
In Linnean taxonomy, the most unique level is _____.
species
genus
kingdom
breed
PLEASE HURRY WILL MARK BRAINLIEST IF CORRECT
What is the nuclear binding energy of an atom that has a mass defect of 1.643 10–28 kg? Use E = mc2. (Remember: The speed of light is approximately 3.00 108 m/s.) 1.83 10–46 J 4.93 10–20 J 1.48 10–11 J 5.48 1045 J
Answer:
C.
Explanation:
edge
The nuclear binding energy of an atom that has a mass defect of 1.643×10⁻²⁸ kg is 4.93 10⁻²⁰ J . Hence option B is correct.
What is Binding Energy ?The binding energy is the amount of energy necessary to detach a particle from a particle system or to scatter all of the system's particles. Subatomic particles in atomic nuclei, electrons bound to nuclei in atoms, and atoms and ions linked together in crystals are all examples of binding energy.
Nuclear binding energy is the energy necessary to entirely split an atomic nucleus into its component protons and neutrons, or the energy freed by merging individual protons and neutrons into a single nucleus. The hydrogen-2 nucleus, which consists of one proton and one neutron, may be entirely separated by delivering 2.23 million electron volts (MeV) of energy. In contrast, when a neutron and a proton move slowly, When a slowly moving neutron and proton unite to produce a hydrogen-2 nucleus, 2.23 MeV of gamma radiation is released. The total mass of the bound particles is smaller than the sum of the masses of the component particles by an amount equal to the binding energy (as represented in Einstein's mass-energy equation).
In this problem,
The mass defect is Δm = 1.643×10⁻²⁸ kg
Speed of light c = 3×10⁸ m/s
Nuclear binding energy,
B.E. = Δmc²
B.E. = 1.643×10⁻²⁸ kg × 3×10⁸ m/s
B.E. = 4.929×10⁻²⁰ ≅ 4.93 10⁻²⁰ J
Hence option B is correct.
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When you drop a stone into a pool water waves spread out from where the stone landed. why answers?
30 POINTS!
The slope of the Position versus Time Graph represents the object's
A) acceleration
B) displacement
C) position
D) velocity
Answer:
D
Explanation:
VELOCITY!
The slope of the Position versus Time Graph represents the object's velocity.
Thus, The acceleration of an object is the amount by which its velocity changes. Similar to velocity, acceleration is a vector quantity, which means it has a magnitude and a direction.
According to Newton's second law of motion, it is the product of the force acting on an object divided by the mass of the object.
The speed and direction of an object's motion are measured by its velocity. In kinematics, the area of classical mechanics that deals with the motion of bodies, velocity is a fundamental idea.
Thus, The slope of the Position versus Time Graph represents the object's velocity.
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Which half reaction shows both the conservation of mass and the conservation of charge?
A small bug is spinning in a circle. The bug is spinning 12 times a second. What is the angular velocity of the bug?
An electrochemical cell is made up of two half cells connected by an external conductor and a salt bridge. the function of the salt bridge is to
In the electrochemical cell, electron flow from anode to cathode. for the process to continue there must be some mean to keep the charge in balance. the salt bridge maintains the neutrality of solution.the salt bridge does not let the electrons move from the electrolyte. it makes the circuit complete and hence allows the flow of current. some of the examples of salt bridge are KCL, KNO₃ etc.
Put these components of wind energy production in order from first to last. The wind spins turbines. A wind of at least 15 mph is blowing. The spinning of the turbines is used to create electricity.
Explain how to determine the wavelength of a wave.
What kind of thermal energy that flows between objects due to a difference in temperature?