Speed up and spread apart
Explain how a microwave oven heats a cup of water.
A microwave oven heats water by emitting microwaves that cause water molecules to rotate and create thermal energy, efficiently heating the liquid due to the molecular freedom in the water.
A microwave oven heats a cup of water by utilizing microwaves at a frequency of 2.45 GHz, which excite the water molecules in the cup. These microwaves create an oscillating electric field that exerts a torque on the dipolar water molecules, causing them to rotate aggressively. This doesn't substantially heat the container as materials like plastic and glass lack these dipolar water molecules. This molecular motion translates into thermal energy due to friction and collisions between molecules, thus heating the water. It's observed that heating liquids like water is much more efficient than solids due to the greater freedom of movement that allows the molecules in liquids to more readily absorb and disperse the energy from the microwaves.
Which of the following is used to determine if a star is moving closer to Earth?
which of the following types of waves has the greatest amount of energy?
Which of the following adaptations would help a tree-dwelling nocturnal scavenger survive in its environment?
Answer:
Night vision
Explanation:
Nocturnal animals have generally bigger eyes than humans and have mostly a tubular shape. This makes more light enter the retina which makes it possible for animals to see at night. Nocturnal animals do all of their activities at night so they need night vision to survive. With night vision they can hunt for food, run away from predators.
The color of fur helps animals to camouflage themselves this would be of no use to nocturnal animals.
Furry heels and short snouts also would be of no use to nocturnal animals.
Why do oceanographers study Meddies?
WILL GIVE BRAINLIEST!!!
The Mid-Atlantic Ridge in the Atlantic Ocean is the site of the largest mountain range in the world. It runs all the way from the Arctic Ocean to the southern tip of Africa. Because of movements at the Mid-Atlantic Ridge, the Atlantic Ocean widens by about 2.5 centimeters each year. Which type of plate boundary causes this motion?
A) Transform boundary
B) Strike-slip boundary
C) Divergent boundary
D) Convergent boundary
Answer:
Explanation:
Divergent Boundary
Answer:
The Mid Atlantic Ridge, like other ocean ridge systems, has developed as a consequence of the divergent motion between the Eurasian and North American, and African and South American Plates
Explanation:
Marisa's car accelerates at an average rate of 2.6m/s2. How long will it take her car to accelerate from 24.6m/s to 26.8m/s?
A location in Florida is facing acute water shortage. Which of these is the best method to conserve water in homes of the location?
Decrease in amount of time that you spent exercising is a form of overloading training true or false
Sedimentary rocks are over 10,000 feet thick in some areas.
true or fasle
Answer: True
Explanation:
Sedimentary rocks are, in average, 1800m thick, where 1m = 3.28084 ft
so 1800 meters are equivalent to 1800*3.2 ft = 5760 ft.
But this is the average, there are some areas with no sedimentary rocks at all, and some areas, like the Texas and Lousiana Gulf coasts, that have around 20,000m of sedimentary rock, and knowing that 1m = 3.2ft
20,000m is a lot more than 10,000 feet, so the statement is true.
A tennis ball is tossed up off a building with a velocity of 22m/s. It takes 6.4s to reach the ground. How high is the building and what is the maximum height of the tennis ball?
The function of the respiratory system is to
A) did the body of waste
B) transport materials in the body
C) break down food
D) breathe
Answer:
to breathe
Explanation:
Which describes the greatest displacement?
A) walking 3m east, then walking 3m north, then 3m west
B) walking 3m east, then 3m south, then 3m north
C) walking 3m north, then 3m south, then walking 3m north
D) walking 3m north, then 3m west, then 3m south
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The greatest displacement is either option A or C, as both result in the person being displaced by 3 meters north of their starting point.
Explanation:The question asks which of the given options describes the greatest displacement. Displacement is a vector quantity that describes the change in position of an object. It is important to understand that displacement takes into account the initial and final positions, not the total distance traveled.
A) walking 3m east, then walking 3m north, then 3m westB) walking 3m east, then 3m south, then 3m northC) walking 3m north, then 3m south, then walking 3m northD) walking 3m north, then 3m west, then 3m southFor option A, the displacement would result in the person being 3m north from their starting point, since the east and west movements cancel out. Option B results in the person being 3m east of the starting point, as the south and north movements cancel each other out. Option C essentially brings the person back to their starting point after the first two movements, and then displaces them 3m north, similar to option A. Finally, option D involves the person moving 3m in each of the cardinal directions, which would bring them right back to their starting point, resulting in a displacement of 0 meters.
The correct answer is either option A or C, as both result in the greatest displacement, which is 3 meters north.
IN THIS FORMULA FOR WATER WHAT DOES THE SUBSCRIPT 2 INDICATE
Denise is conducting a physics experiment to measure the acceleration of a falling object when it slows down and comes to a stop. She drops a wooden block with a mass od 0.5 kilograms on a sensor on the floor. The sensor measures the force of the impact as 4.9 newtons. Whats the acceleration of the wooden block wgen it hits the sensor
Answer:
[tex]a = 9.8 m/s^2[/tex]
Explanation:
As we know that here given parameters are
[tex]mass = 0.5 kg[/tex]
also we know that force of impact on the floor is given as
[tex]F = 4.9 N[/tex]
now we know by the Newton's 2nd law says that the net force on an object is product of mass and its acceleration
it is given by
[tex]F = ma[/tex]
now we have
[tex]a = \frac{F}{m}[/tex]
[tex]a = \frac{4.9}{0.5}[/tex]
[tex]a = 9.8 m/s^2[/tex]
what is the coefficient of static friction if it takes 34n of force to movea box that weighs 67n?
The coefficient of static friction would be 0.507 if it takes 34 Newtons of force to move a box that weighs 67 Newtons.
What is friction?Friction is a type of force that resists or prevents the relative motion of two physical objects when their surfaces come in contact.
As given in the problem we have to find out the coefficient of static friction if it takes 34 Newtons of force to move a box that weighs 67 Newtons.
The normal force acting on the box = weight of the box
=67 Newtons
The friction force = coefficient of the friction × Normal force
34 = coefficient of the friction × 67
The coefficient of the friction = 34/ 67
=0.507
Thus, the coefficient of static friction would be 0.507 if it takes 34 Newtons of force to move a box that weighs 67 Newtons.
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Select the best answer for the question.
19. In a stringed musical instrument, the sound frequency of a particular string can be increased by
Use the following terms in the same sentence:proton, neutron ,and isotope
How does an atom change if all of its electrons are removed?
Answer:
The atom becomes positively charged.
Explanation:
I took the assignment.
Which question about the discovery of the earth revolving around the sun could be best answered using scientific inquiry
In order to scientifically demonstrate that Earth is spherical, one can measure the Earth's curvature, conduct gravity experiments, utilize satellite imagery, and observe the change in constellations at different latitudes.
Explanation:The question that could be best answered using scientific inquiry about the discovery of the Earth revolving around the sun would be: Give four ways to demonstrate that Earth is spherical.
Measure the Earth's curvature using a long-distance view, such as observing a ship disappearing over the horizon.Conduct experiments with gravity, such as observing the shape of water in a container or using a plumb line to measure verticality.Utilize satellite imagery or photos taken from space to show the Earth's spherical shape.Observe the change in constellations as you move away from the equator, which can only be explained by Earth's sphericity.How much force is needed to accelerate a 66 kg skier at 2 m/sec2? A) 132 kg B) 33 N C) 0.03 kg D) 132 N
Your soccer team needs to add a new player midseason. Which of these people would most likely demonstrate good sportsmanship based on the information provided? Lexi, because she played on the championship team last year George, because he is the most fit person in the school Jasper, because he developed friendships playing with everyone last year Lauren, because she is competitive and has a drive to win
Answer:Jasper
Explanation:
Soccer team need to add new player so we should add jasper, because he developed friendships playing with everyone last year .Great sportsmanship can be expected from jasper as he know the team inside out .He may also know strength of weakness of the team mates thus he most suitable for team.
Shield volcanoes result from _____.
liquid lava
cinders
bombs
ash
Answer:
liquid lava
Explanation:
A paper clip is pushed horizontally off a table with speed 1.5m/s. If the table has a height of 1.1m how far from the table does the paper clip land?
A. 1.4m
B.1.1m
C. 0.47m
D.0.71m
true or False: Friction makes energy vanish. Explain your answer!
What occurs when an object vibrates in response to sound waves of a certain frequency?
answer: resonance
Explanation: APHEX
How are frequency and wave period Related?
The frequency and period of any wave are reciprocals.
Frequency = 1/period and Period = 1/frequency .
That means that the product of (frequency) times (period) of any wave is always the same. The product is always ' 1 ', with no unit.
Any wave's frequency and period are reciprocals. Time period is the inverse of the frequency.
What is frequency?Frequency is defined as the number of cycles per second. The time to make one complete cycle is frequency. Its unit is Hertz.
Frequency and period are related as;
Period = 1/frequency
Frequency = 1/period
Hence,any wave's frequency and period are reciprocals.
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At 2.5 seconds, the helicopter has a kinetic energy of 20J. What is its mechanical energy at that time?
Which of the following is not true of the seasons?
The Earth is closer to the sun during the summer and farther away from the sun during the winter.
The seasons are caused the tilt of the Earth on its axis.
Summer does not start on the same day in every country on the Earth.
During the summer, days are longer.
Summer does not start on the same day in every country on the Earth. This statement is not true of the seasons. Hence option C is correct.
What is summer ?Summer is the hottest season of the year, lasting from spring through October. It is commonly described as the period between the summer solstice (year's longest day), June 21 or 22, and the autumnal equinox (day and night equal in duration), September 22 or 23 in the Northern Hemisphere, and December 22 or 23 in the Southern Hemisphere. Summer temperatures differ from other seasons only in the middle and high latitudes; temperatures in the tropical areas fluctuate little from month to month. See season for information on the physical reasons of the seasons.
Summer is connected with development and maturity in European languages, particularly that of cultivated plants, and indeed, summer is the season of highest plant growth in countries with sufficient summer rainfall. Many civilizations have utilised festivals and ceremonies to commemorate summer in appreciation of its role in food production.
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Food chains are made up of many_____________. HELP ASAP!!!!!