Answer:
how the areas are at
Explanation:
The tilt of the Earth's AXIS is the most important reason why seasons occur... The area depends why there's a certain differnt season on differnt areas , its because one area is closet to the sun which mostky they get summer full time (like a normal year), but Alaska,it just winter , the reason why Alaska is just cold because its not close to the sun.
The chocolate in your favorite candy bar has the chemical formula: C7H8N4O2. What elements are present in this formula? Carbon, hydrogen, nitrogen, oxygen.
How many atoms of each element are in this molecule? 7 carbon atoms, 8 hydrogen atoms, 4 nitrogen atoms, and 2 oxygen atoms.
Using some of the trends that you described in question 2, what patterns do you notice between these elements on the periodic table? (Hint!: Be sure to refer to your periodic table to answer this question!)
Carbon, hydrogen, nitrogen and oxygen are all non metals.
Lab Report: Reaction Rates and Temperature
In this activity, you will complete a virtual experiment to determine how the temperature of water affects the time it takes for antacid tablets to dissolve.
Pre-lab Questions
1. How does an increase in concentration affect a chemical reaction?
2. When temperature increases, what happens to the molecules in a chemical reaction?
3. How do we measure the average kinetic motion of molecules in a solution?
Hypothesis Before you begin your lab, write a hypothesis that reflects how you think temperature of the water will affect the reaction rates. Record your hypothesis as an “if, then” statement.
Variables
This experiment tests how the temperature of water affects the time it takes for antacid tablets to dissolve.
1. What is the independent variable?
2. What is the dependent variable?
Materials
Note that you may choose to conduct this lab with the materials listed below (follow all lab safety procedures) or by watching the experiment video in the lesson.
• 4 antacid tablets
• 2 clear cups labeled Hot and Cold
• Water
• Timing device
Procedure
• Observe the experiment in the virtual lab window. (Or, if you choose to perform this experiment yourself, follow the same procedures shown in the video.)
• Record the time for each trial of the experiment.
Data
Data table: Record the length of time for each trial.
Trial
Time for tablet to dissolve in hot water
Time for tablet to dissolve in cold water
1
2
Graph
Create and include a graph to show the results from the trials. You may use the Create A Graph tool located in the course toolkit for help creating a graph.
Post-Lab Questions
1. Review your data. Did your experiment support your hypothesis? Support your answer with data from your experiment.
2. How did the temperature affect the time it took for the antacid tablet to dissolve?
3. What evidence indicates that a chemical reaction took place?
4. Predict what would happen if the same experiment was conducted with different amounts of water.
Answer:
3. How do we measure the average kinetic motion of molecules in a solution?Hypothesis Before you begin your lab, write a hypothesis that reflects how you think temperature of the water will affect the reaction rates. Record your hypothesis as an “if, then” statement.VariablesThis experiment tests how the tempe
Explanation:
Answer: Look at the PDF I attached. Hope this helps!
Describe the 3 layers of the mantle
Answer:
The 3 main layers are the core, mantle and crust
Explanation:
Answer:
I hope this is the answer for your question
Explanation:
Mantle is the widest section of the Earth. Its thickness is approximately 2,900 km. The mantle is mainly made up of semi-molten rock known as magma. The rock is hard in the upper part of the mantle, but lower down the rock is softer and begins to melt.
The mantle is located directly under the Sima. The mantle consists of very hot and dense rock. This layer of rock flows like asphalt under heavy weight. This flow is because of the greatest temperature differences from the bottom to the top of the mantle. The reason behind the plates of the Earth move is the movement of the mantle. Its temperature varies between 1600 oF at the upper part to 4000 oF near the bottom.
In which state is the best known source of petrified wood located? A Arizona B Alaska C California D Colorado
Answer:
Arizona.
Explanation:
Petrified Forest National Park is an American national park in Navajo and Apache counties in northeastern Arizona. Named for its large deposits of petrified wood, the park covers about 346 square miles (900 square kilometers), encompassing semi-desert shrub steppe as well as highly eroded and colorful badlands.
Someone help me with this ASAP
question is in the pic
Answer: The answer is A
A tourist at scenic Point Loma, California uses a telescope to track a boat approaching the shore. If the boat moves at a rate of 15 meters per second, and the lens of the telescope is 50 meters above water level, how fast is the angle of depression of the telescope (θ) changing when the boat is 190 meters from shore? Round any intermediate calculations to no less than six decimal places, and round your final answer to four decimal places.
Answer:not sure just here for points
Explanation:
yeah
Why does an ice cube melt when you hold it in your hand?
A. Thermal energy from your hand flows into the ice cube.
B. Your hand pulls kinetic energy away from the ice cube.
C. The air around the ice cube insulates it from the thermal energy in your hand.
D. Potential energy from your hand is converted into thermal energy.
Answer:
Thermal heat
Explanation:
The heat is transferred from your hand to the ice cube resulting in it melting.
the resistance of a platinum wire in melting ice and biking water is 800 and 910 respectively. what is the temperature when the resistance is 1000
this is the answer of your question
plz open the attachment
Hi guys :) I am in desperate need of help. Thanks <3
Answer:
yes me to i think its A
Explanation:
contrast radiation with conduction
( keep it short and simple , make one sentence . )
Answer:
In radiation, heat transfer occurs through electromagnetic waves without involving particles. In conduction, heat transfer takes place between objects by direct contact.
Do some research, and look up the difference between the zinc-carbon battery described in the lesson, and the alkaline battery (shown at the bottom), which is another common dry cell that we use every day. What are the electrodes made of in the alkaline battery? The electrolyte? Does one type have an advantage over the other? Write a short essay.
Answer:
Here it is:
The difference between a zinc battery and the alkaline battery is the type of electrolyte in them. Zinc batteries are mostly composed of ammonium chloride. But alkaline batteries use potassium hydroxide.
Alkaline-manganese, also known as alkaline, is an improved version of the zinc-carbon battery and delivers 1.5V. Lewis Urry (1927–2004) invented alkaline in 1949 while working with the Eveready Battery Company laboratory in Ohio, USA. Alkaline gives off more energy at higher load currents than zinc-carbon. The Canadian inventor Lew Urry patented the first modern primary alkaline battery in 1959.
The alkaline manganese battery utilizes electrodes of zinc and manganese dioxide, but the electrolyte is potassium hydroxide. The electrolyte of a battery consists of soluble salts, acids, or other bases in inside a liquid, in gelled and dry formats. The electrolyte also comes in a polymer, as used in the solid-state battery, solid ceramic, and molten salts as in the sodium-sulfur battery.
As expected, the capacity of both batteries is different. Because of the composition, an alkaline battery delivers more energy than a zinc battery. The only consequence of this is that both batteries should be used in different applications.
You will need a magnifying glass and a small piece of scrap paper for this demonstration.
a. Go outside on a sunny day and put the piece of paper on a patch of asphalt, concrete, or a large flat rock. Make sure there is no other combustible material or debris in the vicinity.
b. Hold the magnifying glass so it is close to the paper, with rays of sunlight shining through it. Move the magnifying glass side to side and close or away from the paper until the most concentrated ray of light is shining on the paper. This is the focal point for that magnifying glass.
c. Measure the distance between the focal point and magnifying glass. This is the focal length for that magnifying glass. (Be careful; if you hold the magnifying glass in that place for long enough, the paper will catch fire. Do not ever do this on your skin or clothing, as it can cause serious burns.)
d. Now take the magnifying glass inside and use it to look at the words in a book. What is the focal length now?
Answer: you did not ask a question baka
Explanation:
the question what is it
What is an ecosystem? Group of answer choices An ecosystem is all different populations of animals in an area. An ecosystem is a community of plants and animals and their physical surroundings. An ecosystem is a single example of a particular species of plant or animal. An ecosystem is all the organisms of a particular kind of species and their surroundings.
Answer: An ecosystem is a community of plants and animals and their physical surroundings
Explanation: An ecosystem is a geographic area where plants, animals, and other organisms as well as weather and landscape work together to form a bubble of life. Ecosystems contain biotic and abiotic factors both. Biotic factors include plants, animals, and other organism
Answer: An ecosystem is a community of plants and animals and their physical surroundings.
Explanation: Ecosystem plays an essential role for the existence of living organisms in the planet Earth. A balanced ecosystem is attained as a result of various reasons it includes the live ratio of diverse varieties of organisms in a particular ecosystem, necessary physical, biological, and chemical conditions that promotes the living of organisms, and the balanced atmosphere attained as the result of temperature, wind, and humidity.
As all the above mentioned properties are necessary for maintaining a sustainable ecosystem, it is clearly understood that an ecosystem is a community of plants and animals and their physical surroundings.
When you drop something, first of all it accelerates.
The faster it falls, the bigger the force of ______ that acts on it.
choose from the list to complete the sentence:
friction gravity air pressure
note: apparently the answer is friction but it doesn't make sense to me so please explain.
The faster an object is going, the more resistance there will be. An example of this would be if you're running the faster you run, the more air is going against you.
I hope this helps!
(you can just say a color)
Answer:
I think its red
Explanation:
divide the distance 8000 by the hours 10 to get 800
Answer:
Red.
Explanation:
If you divide the distance by the time, you will discover that the airplane traveled 800 miles per hour.
Pls mark Brainliest with the crown.
Conventional energy sources often use spinning turbines to make electrical energy. How is this process similar to wind energy and wave energy?
Explanation:
A fluid motion, vapors, burning fuel, or wind is a sequence of rotors arranged on a driveshaft in an electrical generator. The rotor shaft of a generator is spun/rotated by the pressure of the fluid on the blades. The rotor's mechanical energy is transformed into electrical energy via the generator.
A driver is driving a 6371 kg lorry. After spotting a hazard, the driver applies the brakes. The lorry decelerates uniformly and comes to a stop 60 m after the brakes are applied. Estimate the braking force needed to stop the lorry.
Answer:
The estimated braking force needed to stop the lorry is zero, based on the given information and calculations. However, it's important to note that this result is likely not accurate, as some force is required to stop a moving object. It's possible that additional information or calculations are needed to obtain a more realistic estimate of the braking force.
Explanation:
To estimate the braking force needed to stop the lorry, we can use Newton's second law of motion, which states that force (F) is equal to mass (m) multiplied by acceleration (a).
In this case, the lorry decelerates uniformly, so the acceleration is constant. The initial velocity is assumed to be zero since the lorry comes to a stop. The final velocity is also zero. Therefore, we can use the equation:
Final velocity squared (vf^2) = Initial velocity squared (vi^2) + 2 * acceleration (a) * distance (d)
Since vi = 0 and vf = 0, the equation simplifies to:
0 = 0 + 2 * a * d
Solving for acceleration (a), we have:
2 * a * d = 0
a = 0
Since the acceleration is zero, it means that the braking force needed to stop the lorry is also zero. This is likely not an accurate result as some force is required to stop the lorry. It's possible that additional information or calculations are needed to accurately estimate the braking force.
The braking force required to stop a 6371 kg lorry after spotting a hazard and applying the brakes is what the question is asking for. The lorry decelerates uniformly and comes to a stop 60 meters after the brakes are applied.
The following steps will guide you on how to calculate the braking force:
Step 1: Determine the mass of the lorry which is 6371 kg. This will be denoted as m.
Step 2: Determine the distance travelled by the lorry, which is 60 m.
Step 3: Determine the time taken by the lorry to stop. This can be done by using the formula for uniform deceleration, which is a = (v-u)/t where v is the final velocity, u is the initial velocity and a is the uniform deceleration. Since the lorry comes to a stop, its final velocity is zero and its initial velocity is unknown.
However, we can assume that the lorry was initially travelling at a constant speed before spotting the hazard. Therefore, we can assume that the initial velocity was equal to the average velocity of the lorry before the brakes were applied.
This can be calculated using the formula v = d/t where d is the distance travelled and t is the time taken. The average velocity can therefore be calculated as follows: v = d/t = 60 m/t
Step 4: Rearrange the formula for uniform deceleration, a = (v-u)/t, to find u which is the initial velocity. Since the lorry comes to a stop, we know that v = 0.
Therefore: u = v - at where a is the uniform deceleration and t is the time taken to stop which is also equal to the time taken for the lorry to travel the distance of 60 meters. Substituting for v, we get: u = - at
Step 5: Calculate the acceleration of the lorry using the formula a = (v-u)/t. Since the final velocity is zero, we get: a = -u/t = -(-at)/t = a The acceleration is negative since the lorry is decelerating.
Step 6: Calculate the braking force using the formula F = ma where F is the braking force and m is the mass of the lorry. Therefore: F = ma = (-ma) since a is negative = (-6371 kg) (a) Therefore, the braking force required to stop the lorry is -6371a N where a is the uniform deceleration calculated in Step 5.
For more such questions on lorry decelerates
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Which item produces the magnetic field in the electromagnet?
The magnet produces a magnetic field. Item A makes the magnetic field in the electromagnet.
Explanation:
Item A is called a magnet. It has a North pole and a South pole. The electrons move from the North to the south poles, creating a magnetic force.
This Magnetic field creates a magnetic field around a magnet.
Answer: D
Explanation: it is made of metal which attracts the magnetic force field
Which of these are functions of capillaries? (Select all that apply.)
absorb oxygen and nutrients
carry blood away from the heart
deliver blood to all cells
surround alveoli
Answer:
Absorb oxygen and nutrients.
Surround Alveoli.
Explanation:
Absorbing Nutrients takes place in the intestines where the walls are richly supplied with blood vessels to maximise absorption of nutrients.
Absorbing Oxygen takes place in the lungs , specifically the alveoli. The Alveoli is covered with cappilaries whose function is to exchange gases.
what is the amount of protons, neutrons, and electrons in the atom to make water
Answer:
10 protons 8 neutrons 10 electrons
Did you notice that you could use the magnet to get the paper clip to move without
touching it?How was this similar to the floating plant?A change in motion can only happen when a force is acting on an object.What force was acting on the paper clip?Using the paper clip and the magnet as an example, make a claim how magnets can make an object move without touching the object.
Yes, I noticed that a magnet could be used to move the paper clip without touching it.
It is similar to the floating plant because both processes involve a force acting on an object without having a direct physical contact.
The force acting on the paper clip is described as the magnetic force,
The claim can be made that magnets could move an object without physical contact by using the magnetic force to exert a force on the object.
What is magnetic force?A magnetic field is described as a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials.
In this case , the magnetic force arose due to the interaction between the magnetic fields of the magnet and the paper clip.
The magnet has a magnetic field around it, which exerts a force on any nearby magnetic material, such as the paper clip.
Learn more about magnetic field at: https://brainly.com/question/14411049
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Answer:
Yes, I noticed that a magnet could be used to move the paper clip without touching it.
It is similar to the floating plant because both processes involve a force acting on an object without having a direct physical contact.
The force acting on the paper clip is described as the magnetic force,
The claim can be made that magnets could move an object without physical contact by using the magnetic force to exert a force on the object
Explanation:
Why did the chicken cross the road?
(excepting any answers)
Answer:
to get to other side
because it could not be stopped by death
do footballers get paid even though they do not win a match?
Answer:
However, in general, football players are paid whether they are paid or not. However, it is clear that if they are not on the field, they will not get a win, a goal or more.
Answer:
no
Explanation:
they shouldn't get paid unless they win
This is a science question
The air currents across the continents would determine the distribution of the air.
What are air currents?Air currents across the continents are primarily driven by temperature differences and the rotation of the Earth. The warm air near the equator rises and flows towards the poles, while the cooler air near the poles sinks and flows towards the equator.
This creates large-scale circulation patterns known as Hadley cells, Ferrell cells, and Polar cells. These cells are responsible for the trade winds, westerlies, and easterlies, respectively. Additionally, there are also local winds caused by differences in terrain, such as sea breezes and valley breezes.
Learn more about air currents:https://brainly.com/question/4134845
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Name some applications of white surfaces.
I need help with this question ;-;
Measuring distance traveled in a specific amount of time is --.
a. speed
b. acceleration
c. momentum
d. inertia
What two gases in the atmosphere do animals and plants need to breathe and grow?
Answer: Explanation:
Plants and animals each produce the gases that the other needs to live. Plants need carbon dioxide—people and other animals exhale carbon dioxide as a waste product. People and other animals need oxygen—plants produce oxygen during an important process called photosynthesis, which turns the sun's energy into nutrients.
Why is the earth big and on the outside round but still bug?
Compare the series of events that led to people going into outer space with the series of events that led to Curiosity landing on Mars.
Answer:
The Mars Science Laboratory and its rover, Curiosity, were launched from Earth on November 26, 2011. As of May 15, 2021, Curiosity has been on the planet Mars for 3119 sols (3204 total days; 8 years, 282 days) since landing on August 5, 2012. (See Current status.)Prelaunch (2004–2011)
Cruise stage is tested in 2010.[1]
In April 2004, the United States National Aeronautics and Space Administration (NASA) called for scientific experiments and instruments proposals for the Mars Science Laboratory and rover mission.[2] Launch was proposed for September 2009.[3][4] By December 14, 2004, eight proposals were selected, including instruments from Russia and Spain.[2][4]
Testing of components also began in late 2004, including Aerojet's monopropellant engine with the ability to throttle from 15 to 100 percent thrust with a fixed propellant inlet pressure.[2] By November 2008 most hardware and software development was complete, and testing continued.[5] At this point, cost overruns were approximately $400 million.[6] In December 2008, lift-off was delayed to November 2011 due to insufficient time for testing and integration.[7][8][9]
Between March 23–29, 2009, the general public ranked nine finalist rover names (Adventure, Amelia, Journey, Perception, Pursuit, Sunrise, Vision, Wonder, and Curiosity)[10] through a public poll on the NASA website.[11] On May 27, 2009, the winning name was announced to be Curiosity. The name had been submitted in an essay contest by Clara Ma, a then sixth-grader from Kansas.[11]
Explanation:
Evidence for atmospheric loss
On April 8, 2013, NASA reported that much of the atmosphere of Mars has been lost based on argon isotope ratios studies.[89][90]
On July 19, 2013, NASA scientists published the results of a new analysis of the atmosphere of Mars, reporting a lack of methane around the landing site of the Curiosity rover. In addition, the scientists found evidence that Mars "has lost a good deal of its atmosphere over time", based on the abundance of isotopic compositions of gases, particularly those related to argon and carbon.[91]