The atomic number of magnesium is 12. This means that its nucleus must contain
A) 6 protons and 6 neutrons.
B) 6 neutrons and 6 electrons.
C) 12 neutrons and no protons.
D) 12 protons and no electrons.
D took test c:
*have a great day/evening c: *
Choose all answers that apply. Whatcha of the following do plants need for photosynthesis? 1. Carbon dioxide 2. Water 3. Sunlight 4. Chlorophyll 5. Oxygen.
Final Answer:
Plants need the following for photosynthesis:
Carbon dioxideWaterSunlightChlorophyllExplanation:
Photosynthesis is the process by which plants convert carbon dioxide and water into glucose (a form of sugar) and oxygen using sunlight as energy. Carbon dioxide is absorbed from the atmosphere through small pores in the leaves called stomata. Water is absorbed from the soil through the plant's roots. Sunlight is captured by chlorophyll, a green pigment found in chloroplasts within plant cells. Chlorophyll absorbs sunlight energy, which is used to drive the chemical reactions of photosynthesis. Oxygen is produced as a byproduct of photosynthesis and is released into the atmosphere. Therefore, all of the options except for Oxygen are necessary for photosynthesis to occur in plants.
Which procedure would best allow a scientist to observe a chemical property of hydrochloric acid (HCl) solution? cooling the HCl solution until it becomes solid, and measuring this temperature adding zinc to the HCl solution and observing whether or not bubbles are produced placing a conductivity probe into a beaker of HCl solution to determine if it conducts electricity measuring the mass of and volume of a sample of HCl solution to find its density
Answer: Adding zinc to the HCl solution and observing whether or not bubbles are produced.
A change in property that can be observed or can be measured without changing the substance's composition chemically is known as physical property. For example, change in temperature, change in state, change in mass, volume etc.
A change in property due to change in the chemical composition of the substance is known as chemical change. for example, when two substances react with each other and a chemically different product of formed.
→cooling the HCl solution until it becomes solid, and measuring this temperature- Physical change
→placing a conductivity probe into a beaker of HCl solution to determine if it conducts electricity-Physical change
→measuring the mass of and volume of a sample of HCl solution to find its density-Physical change
→adding zinc to the HCl solution and observing whether or not bubbles are produced-Chemical change:This would allow scientists to observe chemical property of HCl solution.
Answer:
The answer is B
Explanation:
I just took the test on edge
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?
This is an imaginary line on Earth's surface equidistant from the North Pole and South Pole that divides the Earth into a northern hemisphere and a southern hemisphere
Answer:
Equator
Explanation:
if you were in a canoe on a calm lake and you threw a heavy stone into the water in front of you what would the canoe do
A- the canoe would move backward a bit
B- the canoe would move forward a bit
C- the canoe would move forward and keep going
D- the canoe would not move because it is too heavy
Answer: Option A: The canoe would move backward a bit.
Explanation:
Newton's third law of motion states that for every action there is equal and opposite reaction. This means when you threw a heavy stone in front of you, you applied a force. Equal and opposite force acted on the canoe and it moved backward a bit.
Hence, according to Newton's third law of motion, when you throw a heavy stone forward, and equal amount of force will push the canoe backwards.
Final answer:
In a canoe, throwing a heavy stone into the water away from you will cause the canoe to move backward a bit due to Newton's Third Law of Motion. This motion is equal and opposite to the force applied when throwing the stone. The principles of forces help understand canoeing strategies, as well as the motion and sinking of objects in water.
Explanation:
When you are in a canoe on a calm lake and throw a heavy stone into the water, what you're experiencing is an application of Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. So, if you throw the stone away from the canoe, the force of throwing the stone forward will produce a reactive force in the opposite direction, causing the canoe to move backward a bit, which corresponds with option A. This movement is temporary, and once the initial reactionary force dissipates, the canoe will stop moving backward unless other forces are at play.
Canoeing techniques also involve understanding the forces at play. When paddling a canoe upstream, staying near the shore is wise due to the slower water speeds caused by friction between the water and the riverbanks. Meanwhile, when canoeing downstream, it is often best to stay near the middle where the current is stronger and can assist in propelling you forward with less effort.
This understanding of forces also clarifies that the motion of objects, such as a stone thrown into water, can be influenced by factors like density and gravitational force, rather than only the force exerted by a throw. When a stone is placed in water, it sinks because the stone's density is greater than water's, leading to a gravitational force that exceeds the buoyant force on the object.
Shield volcanoes result from _____.
liquid lava
cinders
bombs
ash
Answer:
liquid lava
Explanation:
A small child gives a plastic frog a big push at the bottom of a slippery 2.0 meter long, 1.0 meter high ramp, starting it with a speed of 5.0 m/s. What is the frog's speed as it flies off the top of the ramp?
all but one statement applies to electromagnetic radiation
Answer:
Its D can i get brainliest
Explanation:
the chart lists the masses of four balls that have the same momentum. Which correctly compares 2 of the balls
Answer:B : D
The correct answer would be B:The red ball has a greater velocity than the purple ball.
Hope this helped : )
Explanation:
1. Why are the poppy seeds placed in different places (not together)?
Describe how an electromagnet is created? What makes it attract ferromagnetic materials?
A wire that has electrical current successively over it makes a magnetic field. Actually, the simplest electromagnet is a single wire that is twisted up and has an electric current consecutively through it. The magnetic field produced by the coil of wire is like a normal bar magnet. Only definite materials, for instance iron, nickel, cobalt, and gadolinium, display strong magnetic properties. These materials are called ferromagnetic. Ferromagnetic materials will react powerfully to magnets and can also be magnetized themselves. Often an electromagnet is enclosed around a core of ferromagnetic material, for example steel, which improves the magnetic field produced by the coil.
What are the formulas to calculate acceleration A. velocity and time B. displacement and time C. Change in distance and time D. Change in velocity and time
Final answer:
Acceleration can be calculated using the formula for change in velocity divided by change in time. For example, if an object starts with an initial velocity of 10 m/s and ends with a final velocity of 20 m/s in a time interval of 5 seconds, the acceleration can be calculated as 2 m/s².
Explanation:
The formula to calculate acceleration is d. Change in velocity and time. Average acceleration can be found by dividing the change in velocity by the change in time. For example, if an object starts with an initial velocity of 10 m/s and ends with a final velocity of 20 m/s in a time interval of 5 seconds, the acceleration can be calculated as (20 m/s - 10 m/s) / 5 s = 2 m/s².
An object is dropped from a building and strikes the ground with a speed of 31m/s. How tall is the building?
Final answer:
The height of the building from which an object is dropped can be calculated using the formula h = v²/(2g). Substituting the given final velocity of 31 m/s, the building's height is found to be approximately 49.03 meters.
Explanation:
Calculating the Height of the Building from Final Velocity
We can calculate the height of the building from which an object is dropped using the final velocity and the equations of motion under gravity. Assuming that air resistance is negligible and acceleration due to gravity g is constant at 9.8 m/s², the formula derived from the kinematic equations is h = v²/(2g), where h is the height, v is the final velocity, and g is the acceleration due to gravity.
Given that the final velocity is 31 m/s, we can substitute this into the formula along with the acceleration due to gravity:
h = (31 m/s)² / (2 * 9.8 m/s²) = 961 / 19.6 = 49.03 meters. Therefore, the height of the building is approximately 49.03 meters.
what is the mass number of an atom with 5 protons and 7 neutrons?
The Richter scale, used to measure the strength of an earthquake is _________.
A. linear
B. quadratic
C. exponential
Answer: C. Exponential
Explanation:
IIn what form does the sun energy arrive on earth
Answer:
radiation
Explanation:
This is because sun energy travels in form of waves and thus doesn't require a medium to travel in
Which of the following is used to determine if a star is moving closer to Earth?
The process by which planets form when material orbiting some stars starts gathering together through collision and gravitation and electrostatic attraction is called
A) accretion
B) nuclear fusion
C) differentiation
D) strong nuclear force
Answer: A) accretion
Explanation:
Accretion is the growth of a body by aggregation of matter. This is a process of accumulation of particles in a massive object gravitationally attracting more matter, typically gaseous matter, in an accretion disk.
It should be noted that this theory was proposed by Russian geophysicist Otto Schmidl in 1944 and explains that most of the objects in the universe, such as galaxies, stars and planets, are formed by accretion processes. A good example of this is the accretion of mass by a star that is given by the addition of mass to the star from interstellar matter or a neighbor star.
Your environment can play a role in whether or not a specific gene is expressed
A new statue of the town founder is erected in the park. At the unveiling, the statue is a orange-brown copper. After a year, the statue looks blue-green. Has a physical or chemical change taken place?
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.
To learn more about frequency refer:
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How would you calculate the spring constant of an unknown spring?
Final answer:
To find the spring constant, apply Hooke's Law using the formula F = kx, where F is force due to gravity (mg), and x is the stretch distance. For a 10.0 kg mass stretching the spring 8.00 cm, the spring constant is calculated as 1225 N/m.
Explanation:
To calculate the spring constant (k) of a spring, you can use Hooke's Law, which is F = kx, where F is the force applied to the spring, and x is the displacement of the spring from its equilibrium position. In the scenario where a spring stretches 8.00 cm (or 0.080 meters) for a 10.0 kg load, the force exerted by the load (F) can be found using the force due to gravity, which is F = mg. The mass (m) is 10.0 kg, and the acceleration due to gravity (g) is approximately 9.80 m/s². Thus, F = (10.0 kg) × (9.80 m/s²) = 98.0 newtons (N).
Now that we know F and x, we can solve for the spring constant (k):
k = F/x
k = 98.0 N / 0.080 m
The spring constant k is 1225 N/m.
At 2.5 seconds, the helicopter has a kinetic energy of 20J. What is its mechanical energy at that time?
which force acts as an object to move it from rest or a constant straight-line motion?
A . unbalanced
B. Along a straight line
C. Inertial
D. Balanced
The force that is applied in the straight line leads to motion in a straight line.
Effect of force on an objectForce along a straight line is responsible for the movement of an object from rest or a constant straight-line motion because there is no force present in the opposite direction. When the force is applied in the form straight line means from backside of an object, the body moves in the forward direction if no force is coming from the front side.
This type of force compels the object to move in the forward direction in a straight line so we can conclude that the force that is applied in the straight line leads to motion in a straight line.
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Which factors are most likely to limit the growth of the coral reef in the caribbean?
A. High rainfall and clear waters
B. Low rainfall and excessive sunlight
C. High moisture and excessive sunlight
D. Extreme temperature and cloudy waters
Discuss potential behavioral concerns for people should they travel to Mars.
The Answer above is Correct :)
Plateaus consist of vertical beds of sedimentary rock.
True or False
The correct answer is False.
The statement "Plateaus consist of vertical beds of sedimentary rock" is False. Plateaus are typically characterized by horizontal layers of sedimentary rock. According to the law of original horizontality, sedimentary layers are deposited in horizontal, or nearly horizontal, layers. Over time, these horizontal beds of sedimentary rock can form large, flat elevated areas known as plateaus.
The velocity of a wave is a function of its:
energy
form
medium
amplitude
Answer:
amplitude is the answer
A graph of Boyle’s law shows the relationship between
A. Volume and density of gas
B. Volume and pressure of a gas
C. Temperature and volume of a gas
D. Temperature and pressure of a gas