Final answer:
For the same seasonal variation in insolation, land temperature will vary more than the ocean due to water's higher specific heat capacity, which is about four times greater than that of land. Ocean temperatures are further regulated by vertical circulation currents and evaporation, which mix surface water with cooler, deeper water.
:
The higher heat capacity of water compared to rock or sediment means that for the same seasonal variation in insolation, the land temperature will vary more than the ocean. Water has a roughly four times greater specific heat capacity than land, requiring four times more energy to raise its temperature. Additionally, the process of mixing and evaporation contributes to a larger storage possibility for heat in water. As a result, observed warming over the past century is also smaller over the ocean than over land; about 90% of the observed increase in Earth's heat content has been absorbe by the oceans.
Vertical circulation in the ocean, driven by density differences due to salinity and temperature, mixes surface water with cooler water from deeper layers, further moderating temperature changes. Contrarily, this effect is absent on land, leading to greater temperature fluctuations.
Note: The given explanation in point b. appears to be incorrect as it suggests that sand/soil will take longer to heat and cool, implying a higher specific heat than water, which contradicts the scientific fact that water has a greater specific heat than land. The correct assertion is provided in point d., highlighting that water takes longer to heat and cool, indicating its higher specific heat capacity.
On the ignition switch, the ________ position provides power to electrical equipment including lights, wipers, warning lights and radio, without turning on the engine.
ACC is an Autonomous cruise control or adaptive cruise control is a system for road vehicles that automatically adjusts the vehicle speed (can increase or decrease the speed) to maintain a safe distance from vehicles ahead.
There are also many other names of Autonomous cruise control such as active cruise control, intelligent cruise control, or radar cruise control.
What causes a regular reflection?
A. Light waves strike a rough, uneven surface at a 45 degree angle and are reflected back at a 90 degree angle.
B. Parallel light waves strike a smooth, polished surface and reflect back in the same direction.
C. Parallel light waves strike a rough, uneven surface and reflect in different directions.
D. Light waves strike a smooth, polished surface at a 90 degree angle and are reflected back at a 45 degree angle.
Answer:
Option B. Parallel light waves strike a smooth, polished surface and reflect back in the same direction.
Explanation:
Thinking process:
Light possess a dual nature. It has got wave properties as well as particle (electron-like) properties. This means that light travels in pockets or quanta.
When lights hits a smooth shiny surface, it is immediately reflected back. This can be expressed by the wave equation:
[tex]sin i = sin r[/tex]
Where i is the incident ray - the ray that hits the surface
an r is the reflected ray - the ray that leaves the surface.
If the surface is polished and even, it means that the angle of incident is equal to the angle of reflection.
Hence option B is correct.
Glass is a _____ conductor of heat.
A 70 kg box is slid along the floor by a 400 N force. The coefficient of friction between the box and the floor is 0.50 when the box is sliding. Find the acceleration of the box
The acceleration of the box of mass 70 Kg sliding along the floor and havin 0.5 coefficient of friction is 0.81 m/s².
We'll begin by calculating the frictional force opposing the motion. This can be obtained as follow:Mass (m) = 70 Kg
Coefficient of friction (µ) = 0.5
Acceleration due to gravity (g) = 9.8 m/s²
Normal reaction (N) = mg = 70 × 9.8 = 686 N
Frictional force (F) =?F = µN
F = 0.5 × 686
F = 343 NThus the frictional force is 343 N.
Next, we shall determine the net force acting on the box. This can be obtained as follow:Force applied (F) = 400 N
Frictional force (Fբ) = 343 N
Net force (Fₙ) =?Fₙ = F – Fբ
Fₙ = 400 – 343
Fₙ = 57 NThus, the net force acting on the box is 57 N
Finally, we shall determine the acceleration of the box. This can be obtained as follow:Mass (m) = 70 Kg
Net force (Fₙ) = 57 N
Acceleration (a) =?Fₙ = ma
57 = 70 × a
Divide both side by 70
a = 57 / 70
a = 0.81 m/s²Therefore, the acceleration of the box is 0.81 m/s².
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Imagine a landing craft approaching the surface of callisto, one of jupiter's moons. if the engine provides an upward force (thrust) of 3264 n, the craft descends at constant speed; if the engine provides only 2203 n, the craft accelerates downward at 0.39 m/s2. what is the weight of the landing craft in the vicinity of callisto's surface?
Final answer:
The weight of the landing craft on the surface of Callisto is 3264 N, derived by analyzing the force provided by the craft's engine in two different scenarios according to Newton's second law of motion.
Explanation:
The question involves understanding Newton's second law of motion, which is F = ma, where F is the net force applied to the object, m is the mass of the object, and a is the acceleration.
When the engine provides an upward force (thrust) of 3264 N, the craft descends at a constant speed, implying that the thrust balances out the weight of the craft (weight = gravitational force). Therefore, the net force, F, is zero, and the acceleration is 0 m/[tex]s^{2}[/tex]. When the thrust is only 2203 N, the craft accelerates downward at 0.39 m/[tex]s^{2}[/tex]. To find the weight of the landing craft on Callisto's surface, we can use the given data from the two scenarios.
To solve, let's denote the mass of the landing craft as m, and the acceleration due to gravity on Callisto as g. Thus, the weight of the landing craft, which is the gravitational force, can be expressed as W = mg.
From the second scenario, we have:
F - W = ma
2203 N - mg = m(0.39 m/[tex]s^{2}[/tex])
Since the first scenario tells us that F = W when F is 3264 N, substituting back, we get mg = 3264 N. We therefore find the weight of the landing craft to be 3264 N on the surface of Callisto.
a skydiver falls 3km in 15s. How fast are they going. i need my answer in meters! (20 PTS)
What is the difference between accurate data and reproducible data?
Answer:
Accuracy is ‘the state of being correct’ and on the other hand precision is ‘the state of being exact.
Explanation:
Accuracy shows the nearness of the measurement with the actual measurement while precision shows the nearness of an individual measurement with other measurements.
Accuracy focuses on the errors caused by the problem in the instrument. while precision is concerned with errors, which occurs periodically with no recognizable pattern.
If the measurement is precise but inaccurate, the result will not be the expected one. And if the result is accurate but imprecise, then there are huge variations in the measurements. And finally, if the actual measurement is neither accurate nor precise, then the result would not have correctness and exactness at the same time.
The acceleration due to the earth's gravity, in si units, is 9.8 m/s2. in the absence of air friction, a ball is dropped from rest. its speed on striking the ground is exactly 60 m/s. for what time interval was the ball falling?
Water turning into steam represents what kind of change
What types of collisions can result from making unsafe passes?
About one-third of the toxic metal, mercury (hg), is released into the air from natural sources, such as rocks, soil, volcanoes, and the ocean. the remaining two-thirds comes from ____.
a. human activities
b. waste from livestock
c. airplane exhaust
d. automobile exhaust
e. mercury-rich plants
About one-third of the toxic metal, mercury (Hg), is released into the air from natural sources, such as rocks, soil, volcanoes, and the ocean. the remaining two-thirds comes from human activities.
What is mercury?Mercury is the 80th element in periodic table. It is a heavy metal but exists as liquid in room temperature. Mercury is a transition metal having wide applications in various industries.
Mercury is toxic in nature and reported to be dangerous to human health, even causes death by concentric exposure. Global mercury contamination is a result of human activities including mining and the burning of fossil fuels.
Mercury that is released into the air eventually sinks into the ground or is washed into the water. Once deposited, specific microbes can transform it into methylmercury, a very poisonous form that accumulates in fish, shellfish, and animals that consume fish.
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What substance is reduced in a lead storage battery?
In lead acid battery, chemical reactions are induced to do work on charge and produce a voltage difference between the two output terminals.
In a lead storage battery, the negative terminal is composed of lead electrode (Pb2+) while in the positive terminal it is composed of lead dioxide electrode (PbO2).
The chemical half reactions in each electrode are:
Negative Terminal: Pb2+ + SO4(2-) ---> PbSO4 + 2e
Lead electrode is oxidized to supply electrons.
Positive Terminal: PbO2 + H2SO4 + e ---> PbSO4
Lead dioxide electrode is reduced by the addition of electrons.
Answer: Lead dioxide is reduced.
You place a book on top of a spring and push down, compressing the spring by 10 cm. When you let go of the book, it is pushed up by the spring. Which statement describes what happens to the energy of the spring-book-system?
Answer: The gravitational potential energy of the system increases.
Explanation:
Provides some background for this problem. a ball is thrown vertically upward, which is the positive direction. a little later it returns to its point of release. the ball is in the air for a total time of 7.70 s. what is its initial velocity? neglect air resistance.
A railroad freight car with a mass of 29,000 kg is moving at 2.2 m/s when it runs into another car with a mass of 30,000 kg the second car is at rest the cars locked together what is the final velocity
Answer:
1.1 m/s for apex 4.1.6.
Explanation:
i clicked that option and it was right
Jack tries to place magnets on the door of his refrigerator. He observes that the magnets don’t stick. He guesses that the door of the refrigerator is made of a nonmagnetic substance. What stage of scientific investigation does his guess represent?
ask questions
construct a hypothesis
explain the results
make observations
Answer:the one above
Explanation:
the one above
The distance between twin satellites that were originally 150 meters apart are now 300 meters apart. Which best describes the gravitational force between the twin satellites? A) it increased by 1/2 B) it decreased by 1/4 C) it increased by a factor of 2 D) it decreased by a factor of 4
Answer : (B) it decreased by 1/4
Explanation :
It is given that :
The distance between twin satellites that were originally 150 meters apart are now 300 meters apart.
When the satellites are 150 m apart then the gravitational force is :
[tex]F=G\dfrac{m_1m_2}{(150\ m) ^2}[/tex]..........(1)
Similarly, when the satellites are 300 m apart then the gravitational force is :
[tex]F'=G\dfrac{m_1m_2}{(300\ m) ^2}[/tex]...........(2)
From eq (1) and (2)
[tex]\dfrac{F_c}{F_c'}=4[/tex]
[tex]F_c'=\dfrac{F_c}{4}[/tex]
So, the gravitational force between the twin satellites is decreased by 1/4.
Hence, the correct option is (b).
Answer:
B: it decreased by 1/4
Explanation:
What is the value of work done on an object when a 10-newton force moves it 30 meters and the angle between the force and the displacement is 25°?
The bearing of a ship from a lighthouse was found to be n14 degrees14°e. after the ship sailed 7.27.2 miles dueâ south, the new bearing was n31 degrees31°e. find the distance between the ship and the lighthouse at each location.
To solve this problem, let us first assign some reference points. Let us say that initial position of the ship is called point A while the final position is called point B. While the position of the light house is called point L. Together they form a triangle.
The angles are:
angle LAB = 14°
angle ABL = (180 – 31)° = 149°
The lighthouse is at L.
The ship sails 7.2 miles to B.
We see that angle angle ALB = 180 – angle LAB – angle ABL
Therefore
angle ALB = 180 – 14 – 149 = 17°
Now in the triangle ABL, we use the Law of Sines:
AL / sin 149 = 7.2 / sin 17
AL = 12.68 miles
BL / sin 14 = 7.2 / sin 17
The question requires using bearings and trigonometry to calculate distances between a ship and a lighthouse at two points in time. We form two right-angled triangles with common sides, representing the initial distance, and apply trigonometric functions to solve the distances.
The question involves finding the distance between a ship and a lighthouse at two different locations using bearings. Initially, the bearing of the ship from the lighthouse is N14°E. After the ship travels 7.2 miles due south, the bearing from the lighthouse becomes N31°E. To solve this, you can create two right-angled triangles sharing a common side (the initial distance from the lighthouse) - the first triangle for the initial position and the second for the position after the ship's southward journey. You can then use trigonometry to solve for the distances.
To find the initial distance, consider the bearing N14°E as the angle from due north. This implies the ship is east of the lighthouse. Apply the cosine of 14° to calculate the adjacent side, which represents the initial distance from the lighthouse to the ship. Similarly, for the new bearing of N31°E, after sailing due south, the ship will be further east. Use the cosine of 31° for calculating the new distance to the lighthouse. These calculations will require the use of a calculator.
Using the new position distance and the southward travel of 7.2 miles, it is also possible to calculate the initial distance to the lighthouse before the ship moved southwards. Add the distances traveled eastward from the two positions of the ship to find this initial distance.
What energy is calculated from an object's mass height and the acceleration due to gravity?
Variable A and variable B have an indirect relationship. If variable A decreases, how will variable B respond?
WHY did NASA scientist Madhulika Guhathakurta compare the solar eclipse to the 1969 moon landing?
A) The moon landing illustrated the importance of scientific discovery in 1969, and she believes the solar eclipse will be remembered as a similarly important event today.
B) The moon landing was a landmark event in 1969 that demonstrated the importance of NASA, a fact she is using to persuade President Trump not to cut NASA funding.
C) The solar eclipse is similar to the moon landing because both used new technologies to share information about scientific events with the public.
D) The solar eclipse is similar to the moon landing because they both relate to space and discovery despite occurring nearly 50 years apart.
The solar eclipse is compared to the 1969 moon landing due to their significance in space and discovery, despite the time gap. Both events captivated the public and demonstrated advancements in technology and our understanding of the universe.
Explanation:NASA scientist Madhulika Guhathakurta compared the solar eclipse to the 1969 moon landing because both events were significant in terms of space and discovery, despite occurring nearly 50 years apart. The moon landing was a historic achievement in human space exploration, and the solar eclipse, while not a human accomplishment, is a rare celestial event that offers valuable scientific insights. Both events captivated the public and showcased the advancements in technology and our understanding of the universe.
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How long (in ns) does it take light to travel 1.30 m in vacuum?
As a solid element melts, the atoms become __________ and they have __________ attraction for one another. more separated, more more separated, less closer together, more closer together, less larger, greater
an input force of 20 newtons is applied to a lever at a distance of 2 meters from the fulcrum and object 0.5 M away from the fulcrum and on the other side is lifted by the 20-N force what is the output force?
With respect to energy, which is not necessarily a goal of chemistry ?
Answer:
I believe I know your answer choices, the answer would be finding ways to use energy
Explanation:
In chemistry we have a way to store the power, we use batteries to store this energy, so it can’t be this. We also have a way to produce it consistently, using wind power and solar panels. We currently are making strides to conserve energy, by sharing consumptions graphs with others. Chemistry is all about finding the use for it! There possibilities never end, which makes this goal, and more importantly, the answer.
If you divide a force measured in newtons (1 newton = 1 kg*m/s^2) by a speed expressed in meters per second, in what units will the answer be expressed?
If you are riding in a vehicle equipped with a lap belt and also a separate shoulder belt, you are
Riding in a vehicle with a lap belt and a separate shoulder belt provides significant protection in car accidents. The lap belt secures the lower body while the shoulder belt secures the upper body.
Explanation:If you are riding in a vehicle equipped with a lap belt and also a separate shoulder belt, you are using one of the most effective safety measures for passenger vehicles. These belts, when used together, greatly reduce the chance of serious injury or death in a car accident. The lap belt secures your lower body, preventing you from sliding forward or sideways, while the shoulder belt protects your upper body, preventing you from being ejected from the vehicle or hitting the interior elements during a collision.
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how long does it take to walk 0.13 miles
The most common listening problem is
A. trying to listen to two people at once.
B. assuming what the other person has to say isn't important.
C. paying attention but misinterpreting the message.
D. not giving other people a chance to talk.
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