A major consequence of ozone depletion is C. more harmful UV rays will reach the earth's surface due to ozone depletion. The correct option is C.
A major consequence of ozone depletion is that more harmful ultraviolet (UV) rays will reach the Earth's surface (Option C). Ozone depletion in the stratosphere allows increased penetration of UV-B and UV-A radiation, which can have adverse effects on human health, ecosystems, and the environment. Excessive UV exposure can lead to skin cancer, cataracts, and other health issues in humans.
It can also harm marine life, crops, and forests, disrupting ecosystems and food chains. Stratospheric ozone depletion does not directly cause over-vegetation (Option A), render solar energy ineffective (Option B), or increase acid rain (Option D). Addressing ozone depletion through international agreements like the Montreal Protocol is crucial to mitigate its harmful impacts on the planet and its inhabitants.
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A battery is the power source for what type of current?
A. AC
B.BC
C.DC
D.All types of current
Answer:
C. DC
Explanation:
A battery is the power source for DC type of current. A battery is a source of constant potential difference that produces a constant current unlike in AC source where the voltage and hence the current changes its polarity continuously.Hence, the current produced by battery is direct current and not Alternating current.
An oscillating block - spring system has a mechanical energy of 1.10 j, and amplitude of 11.0 cm, and a maximum speed of 1.7 m/s. find the spring constant.
Which change occurs when an atom undergoes decay?
lion and leopard are two of Africa's large cat ____.
light travels through a substance at 1.97x10^8. what is the index of the liquid?
The atmosphere _________ most of the incoming visual radiation.
A. Absorbs
B. Transmits
C. Reflects
Answer:
Absorbs
Explanation:
When the solar radiation or visual radiation arrives on Earth's atmosphere, most of the radiation is absorbed.
A part is reflected and transmitted back but major portion is absorbed by the atmosphere.
This absorb radiation helps to keep the Earth warm and thus maintaining the temperature even in Night time.
Most objects emit infrared energy. how do humans recognize this? A.their skin senses it as warmth B. Their vision becomes clearer C. They experience goose bumps on their skin D. They see light emitted from the object
Answer: The correct answer is "their skin senses it as warmth".
Explanation:
Electromagnetic wave: the direction of electric field and magnetic field are perpendicular to the direction to the propagation of the wave. It travels with the speed of the light.
For example, X-rays, gamma rays, infrared rays and visible region.
Infrared radiation: The range of the wavelength is from 700 nm to 1 mm. It is longer than the visible light. It is a part of the electromagnetic spectrum.
The infrared radiations cannot be seen by naked eyes of human. It can be felt by the human being. They can sense it as heat.
It is given in the problem that most objects emit infrared energy. Human can feel this infrared radiation. Their skin senses it as warmth.
What condition is necessary for a moving object to produce a shockwave?
Octane is an important component of gasoline. Octane will ignite at a temperature of 428°F. What is this temperature on the Celsius scale?
Compute the resistance in ohms of a silver block 10 cm long and 0.10 cm2 in cross-sectional area. ( = 1.63 x 10-6 ohm-cm)
Answer:
1.6 x 10^-4 Ω
Explanation:
What are (a) the kinetic energy, (b) the rest energy, and (c) the total energy of a 1.50 g particle with a speed of 0.600 c ?
Which statement is true?
Voltage varies throughout a parallel circuit.
Voltage remains the same throughout a parallel circuit.
In a parallel circuit, the voltage remains constant throughout. An analogy using a bike path explanation further simplifies this concept.
Explanation:In the world of physics, it is true to say: 'Voltage remains the same throughout a parallel circuit'. To further illustrate this concept, consider a bike path as an analogy for a circuit.
If a parallel circuit was a bike path, then each 'fork' in the path represents a separate path for the electricity. Think of the voltage as a measure of energy.
Even though cyclists (or charges) can take different paths (resistors), they all start at the same height (self-same voltage).
Therefore, they all have the same amount of potential energy (voltage) at any point.
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what happens when ice transform into steam
Answer:
The thermal kinetic energy of the molecules is raised
Explanation:
As it takes some amount of heat energy to be converted to thermal energy to turn ice into water and water into a stream. As this state change, the temperature will rise again. As the energy generated is being measured in Joule, a more commonly studied unit is a calorie. As matter vary in their capacity to absorb heat. Like ice needs about 0.50 as specific heat, water as 1.00 and stream 0.48 cal/g in degrees C. As the matter is heated the latent or hidden energy is released and tends to remain until the material changes its state.A circuit has a current of 1.2 A. If the voltage decreases to one third of its original amount while the resistance remains constant, what will be the resulting current?
A wave has a velocity of 24 m/s and a period of 3.0 s. Calculate the wavelength of the wave
Answer:
72 m
Explanation:
The period of a wave is the amount of time it takes a wave complete one full cycle. The period is the inverse of the frequency.
Given;
Wave Velocity V = 24 m/s
Period T = 3.0s
Frequency of the wave F = 1/T= 1/3
Wavelength W= ?
Wavelength is the distance covered by a wave in a complete cycle i.e from one crest to another, or from one trough to another.
W = V/F = VT
W = 24/ (1/3)
W = 24 × 3
W = 72 m
How much heat in joules is needed to vaporize an 18.0 gram sample of water at 100c?
A transformer is a device that increases or decreases voltage. t/f
Answer:
True.
Explanation:
A transformer is used either to increase or decrease the voltage.
It has two separate sets of coils of wire. The coils connected to the input voltage are called primary and the output coils are called secondary.
If number of windings (or coils) of wire in primary are less than the windings in secondary, it is a step up transformer because output voltage will be more than the input voltage. In this case the output voltage given out by the secondary will be more than the primary.
If the primary coils are more than the secondary, it is called a step down transformer. In this case, secondary voltage (output voltage) will be less than the primary.
Nikolas had an idea that he could use the compressed carbon dioxide in a fire extinguisher to propel him on his skateboard.
Which of Newton’s laws would he have used to come up with this idea?
Answer:
Newton's Third Law
Explanation:
Did the assignment
Its C Disposal of radioactive waste is a major concern in nuclear power production. Which method of disposal is least dangerous?
A rod made from insulating material carries a net charge, while a copper sphere is neutral. The rod and the sphere do not touch. Is it possible for the rod and the sphere to (a) attract one another and (b) repel one another? Explain.
Answer:
Sphere R must be negative and Sphere S must be positive or neutral.
Explanation:
Castle Learning. Also the Rod diagram shows electrons in it and we know like charges repel and opposites attract, so the rod must repel Sphere R because it is negative and attract to Sphere S because it is the opposite.
In the visible spectrum, red light has the lowest frequency and violet light has the highest. List the following colors in order of increasing energy. green blue yellow orange A) blue, green, yellow, orange B) orange, yellow, green, blue C) yellow, orange, blue, green D) green, blue, orange,w
The answer is b !!!!!!
In the past, how did people use the systematic movement of celestial bodies? Select all that apply.
making agricultural decisions
shipping navigation
predicting the future
spiritual and religious practices
tracking storms
In past, people used the systematic movement of celestial bodies for making agricultural decisions, shipping navigation and for spiritual and religious practices.
Answer: Options 1, 2, and 4
Explanation:
The observation of systematic movement of celestial bodies comes under the field of Astrometry. The celestial mechanics which defines are the movement of celestial bodies is also a kind of Astrometry.
The celestial mechanics is used by the people in past to help in navigation during ship journey. Even the astrometry will help in predicting the seasons to be coming which will help in making agricultural decisions.
In astrology, the position of celestial bodies help in deciding the time for spiritual and religious practices. So, in ancient days, people used the systematic movement of celestial bodies in naked eyes to decide these.
The sun's electromagnetic radiation is produced by
The sun produces electromagnetic radiation through the movement of electrically charged particles, resulting in a spectrum of radiation that includes harmful UV rays and visible light. This radiation is fundamental for processes like photosynthesis and solar energy generation.
Explanation:The sun's energy is emitted in the form of electromagnetic radiation, which encompasses a wide array of wavelengths, each with its characteristic energy. This radiation is produced by electrically charged particles undergoing transitions, such as the fusion reactions occurring in the sun's core, which results in the release of energy as photons. These photons travel through space and carry energy, momentum, and when interacting with matter, can exert force.
Among the types of electromagnetic radiation emitted from the sun, we find visible light, ultraviolet (UV) rays, X-rays, microwaves, and radio waves. UV rays have shorter wavelengths than visible light and are more energetic, and they are partially absorbed by ozone molecules in the Earth's atmosphere, which helps to protect living organisms from its potentially harmful effects.
Overall, the sun produces a full spectrum of electromagnetic radiation, measurable by scientists on what is known as the electromagnetic spectrum. The entirety of this spectrum is essential for various processes on Earth, from photosynthesis which supports life to solar panels that harness sunlight for energy.
The map of the world is overlaid with the boundaries of the tectonic plates. Look at the location marked with an asterisk (*). What geologic feature would expect to find at that location and why? A) rift zone; two plates move in opposite directions B) island arc; two oceanic plates meet at a convergent boundary C) mountains; two continental plates meet at a convergent boundary D) deep sea trench; subduction where two plates meet and one goes underneath the other
When x-rays of wavelength 0.312 nm are directed at a crystalline sample, the smallest bragg angle for a certain family of reflecting planes is found to be 28.5°. within the sample, the atoms lie on a simple cubic lattice, a 2-dimensional view of which is shown to the right. assuming that the constructive interference observed is due to the pair of diagonal planes indicated by the two dashed lines, find the distance a between neighboring atoms?
Reflection is the bouncing of light rays off of a surface. Which situation is NOT an example of reflection?
A) looking at yourself in a mirror
B) focusing light through a camera lens
C) seeing an image of yourself in a still lake
D) looking at your teacher at the front of the class
The answer is B, Focusing light through a camera lens.s
What is the energy q released in the first step of the thorium-232 decay chain? the atomic mass of 232 90th is 232.038054 u and the atomic mass of 228 88ra is 228.0301069 u. express your answer numerically in megaelectron volts?
Answer: The energy released in the given nuclear reaction is 4.98 MeV.
Explanation:
The equation for the alpha decay of Th-232 nucleus follows:
[tex]_{90}^{232}\textrm{Th}\rightarrow _{88}^{228}\textrm{Ra}+_{2}^{4}\textrm{He}[/tex]
We are given:
Mass of [tex]_{90}^{232}\textrm{Th}[/tex] = 232.038054 u
Mass of [tex]_{88}^{228}\textrm{Ra}[/tex] = 228.0301069 u
Mass of [tex]_{2}^{4}\textrm{He}[/tex] = 4.002602 u
To calculate the mass defect, we use the equation:
[tex]\Delta m=\text{Mass of reactants}-\text{Mass of products}[/tex]
Putting values in above equation, we get:
[tex]\Delta m=(m_{Th})-(m_{Ra}+m_{He})\\\\\Delta m=(232.038054)-(228.0301069+4.002602)=0.0053451u[/tex]
To calculate the energy released, we use the equation:
[tex]E=\Delta mc^2\\E=(0.0053451u)\times c^2[/tex]
[tex]E=(0.0053451u)\times (931.5MeV)[/tex] (Conversion factor: [tex]1u=931.5MeV/c^2[/tex] )
[tex]E=4.98MeV[/tex]
Hence, the energy released in the given nuclear reaction is 4.98 MeV.
Two waves have the same speed. the first has twice the frequency of the second. compare the wavelength of the two waves. 1. the second has one third the wavelength of the first. 2. the first has half the wavelength of the second. 3. the first has one third the wavelength of the second. 4. the second has half the wavelength of the first. 5. they have the s
If a rock weighing 2,200 N is dropped from a height of 15 m, what is its KE just before it hits the ground? Remember, weight is measured in newtons (N), and is equal to mass times gravity.
A. 0 J
B. 2,224 J
C. 147 J
D. 33,000 J
You have just completed a wonderful meal of pasta and crusty bread followed by a huge piece of chocolate cake. This carbohydrate-rich meal has lead to the release of large amounts of sugar into your bloodstream. What is necessary to address the change in blood sugar level?