Which of the following are products of cellular respiration?
Sunlight
Oxygen
ATP
Water
Carbon Dioxide
Answer:
B) ATP
Explanation:
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Block 1 of mass m1 slides along a frictionless floor and into a one-dimensional elastic collision with stationary block 2 of mass m2 = 3.0m1. Prior to the collision, the center of mass of the two-block system had a speed of 5.0 m/s. Afterward, what are the speeds of (a) the center of mass and (b) block 2?
The speeds of the centre of mass is 2 2.0 m/s and block 2 is 4 m/s.
What is speed?The speed of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.
(a) By conservation of momentum, the velocity of the center of mass is unchanged, i.e., 2.0 m/s.
(b) The speed of the center of mass = (m1v1+m2v2) / (m1+m2)
Since the second mass is initially at rest, vcom = m1v1 / (m1+m2)
Therefore, the initial v1 = vcom (m1+m2) / m1 = 2.0 m/s x 6 = 12 m/s
Since the second mass is initially at rest, v2f = v1i (2m1 /m1+m2 ) = 12 m/s (2/6) = 4 m/s
The speeds of the centre of mass is 2 2.0 m/s and block 2 is 4 m/s.
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a 1000 kg car traveling at 30 m/s suddenly stops in 5 seconds. how much force was used to stop the car?
To stop a 1000 kg car traveling at 30 m/s in 5 seconds, a force of 6000 N is required, calculated using Newton's second law of motion. The negative sign indicates deceleration.
Calculating the Force to Stop a Car
To determine the force needed to stop a 1000 kg car traveling at 30 m/s in 5 seconds, we use the formula derived from Newton's second law of motion: Force (F) = mass (m) x acceleration (a).
Step-by-Step Calculation:
Calculate the acceleration (a): Since the car comes to a stop, the final velocity (v) is 0. The initial velocity (u) is 30 m/s, and the time (t) is 5 seconds. Using the formula for acceleration: a = (v - u)/t:
a = (0 - 30 m/s) / 5 s = -6 m/s²
Calculate the force (F): Using the mass of the car (m = 1000 kg) and the acceleration (a = -6 m/s²), we apply Newton's second law:
F = m * a = 1000 kg * (-6 m/s²) = -6000 N
The negative sign indicates that the force is acting in the direction opposite to the car's motion (deceleration). The magnitude of the force is 6000 N.
describe the relationship between work and power (essay)
A car engine applies a force of 65 kN how much work is done by the engine as it pushed a car distance of 75m?
The mathematical definition of work is simply the product of force and distance. That is:
Work = Force * Distance
Hence the work done here by the engine is:
Work = 65 kN * 75 m
Work = 4,875 kJ
The work done on the car when a force of 300 N is applied opposite to the direction of motion over a distance of 25 meters is -7500 Joules.
The question requires us to calculate the work done on a car when a force is applied opposite to the direction of its motion while it travels a certain distance.
Work is calculated using the formula:
Work (W) = Force (F) × Distance (d) × cos(θ)Since the force is applied opposite to the direction of the car's motion, the angle θ between the force and the direction of motion is 180 degrees, and cos(180°) = -1.
Given:
Force (F) = 300 NDistance (d) = 25 mThe work done on the car is:
W = 300 N × 25 m × cos(180°)W = 300 N × 25 m × (-1)Work (W) = -7500 J (Joules)The negative sign indicates that the work is done against the car's direction of motion, which effectively slows it down.
How does the law of conservation of mass apply to this reaction AL +3HCL H2 + ALCL3?
[tex]2 Al + 6 HCl \rightarrow 3 H_2 + 2Al Cl_3[/tex]
Explanation:
In order for the law of conservation of mass to be valid for this reaction, we must balance the atoms of each element so that it is the same in the reactant side and the product side.
In this case, we immediately see that the hydrogen (H) is not balanced: we have 3 on the left and 2 on the right. So, we must put a factor 2 on the [tex]3HCl[/tex] on the left and a factor 3 on the [tex]H_2[/tex] on the right. Now the Cl is no longer balanced (6 on the left and 3 on the right), so we must put a factor 2 in front of [tex]Al Cl_3[/tex]. And to balance the Al, we must add a coefficient 2 in front of the Al on the right.
Summarizing everything, the balanced reaction is:
[tex]2 Al + 6 HCl \rightarrow 3 H_2 + 2Al Cl_3[/tex]
would a balance function correctly on the moon
Yes, a balance measures mass, not weight and can do so in any enhanced environment. Also, the moon has gravity even if it is less than earth. What might be a bit unclear is that masses for it are standardized for Earth's gravitational field at its surface at sea level. So the interpretations for "weight" will have to be increased by 6 times so that it could be equivalent to Earth.
a wagon is being pushed eastward with a force of 80n. the frictional force opposing the motion is 35n west. the wagon experiences a 60n gravitational force pulling downward. the ground counteracts that force with a normal force pushing upward. if the net force acting on the wagon is 45n east, what is the normal force pushing upward on the wagon?
By studying genetics, scientists have learned that _______ control how organisms develop
A. genotypes
B. genes
C. bacteria
D.phenotypes
The biosphere is the highest level of organization in the hierarchy of life on earth. Rank the levels of organization from most complex to simplest.
A) ecosystems > communities > populations > organisms
B) organisms > populations > communities > ecosystems
C) ecosystems > organisms > communities > populations
D) populations > communities > ecosystems > organisms
Describe what you would happen if you did not experience frictional forces as you walked
Four football players are running down the field at the same speed. Player 1 weighs 180 lbs and is running toward the south goal, player 2 weighs 200 lbs and is running toward the north goal, player 3 weighs 190 lbs and is running toward the north goal, and player 4 weighs 165 lbs and is running toward the south goal. Which player has the most momentum?
It takes a car 1.75 h (1 hour and 45 minutes) to go from mile marker 10 to mile marker 115. What is the average speed of the car?
an airplane is traveling 735 KM/H and direction 41.5 west of north find the component of the velocity vector in the notherly and in Westerly directions how far north and how far west has the plane traveled after 3.00h
Answer:
[tex]v_x = 550.5 km/h[/tex] Along North
[tex]v_y = 487 km/h[/tex] Along West
[tex]d_{west} = 1461 km[/tex] Along West
[tex]d_{north} = 1651.5 km[/tex] Along North
Explanation:
Velocity of Airplane is given as
[tex]v = 735 km/h[/tex] at 41.5 degree West of North
now we know that
Along North Direction
[tex]v_x = v cos41.5[/tex]
[tex]v_x = 550.5 km/h[/tex]
Along West direction
[tex]v_y = 735 sin41.5[/tex]
[tex]v_y = 487 km/h[/tex]
Now distance moved by the plane in 3.00 h is given as
Along west
[tex]d_{west} = 487 \times 3[/tex]
[tex]d_{west} = 1461 km[/tex]
Along North
[tex]d_{north} = 550.5 \times 3[/tex]
[tex]d_{north} = 1651.5 km[/tex]
If plants produce oxygen as a result of photosynthesis why aren't oxygen levels continually increasing the atmosphere
Oxygen levels aren't continually increasing in the atmosphere as a result of
animals and humans making use of it.
During photosynthesis, plants manufacture food through the reaction
between carbondioxide(from animals) and water to produce glucose and
oxygen . The oxygen produced is used by animals for cellular respiration
and other metabolic activities.
The oxygen levels isn't increasing but rather it remains slightly constant as a
result of the oxygen being used by animals.
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Final answer:
Oxygen levels in the atmosphere do not continually increase because it is consumed through various processes such as respiration, decomposition, and combustion. It can also react to form ozone or be sequestered by geological activities. The rate of photosynthesis is further limited by factors like temperature and the availability of CO₂.
Explanation:
If plants produce oxygen as a result of photosynthesis, why aren't oxygen levels continually increasing in the atmosphere? The answer lies in the balance of various processes on Earth. While plants do produce oxygen through the process of photosynthesis, there are other processes that consume oxygen and balance out its levels in the atmosphere.
The free oxygen produced by photosynthesis began accumulating in our atmosphere about 2.4 billion years ago. Initially, interactions with Earth's crust and the oceans absorbed much of this oxygen. Over time, life evolved to use oxygen for respiration, which consumes oxygen and produces carbon dioxide. Today, plant and animal respiration, decomposition, and the combustion of organic matter all use oxygen and prevent it from continually accumulating in our atmosphere.
Additionally, the oxygen produced can react with various elements and compounds, such as the formation of ozone in the upper atmosphere, or can be sequestered through the burial of organic matter due to geological activities. This burial of organic carbon helps to remove carbon from the cycle, preventing it from recombining with oxygen to form CO₂.
Moreover, the rate of photosynthesis can be limited by factors such as temperature and the availability of CO₂. Even though some processes can increase photosynthesis, like higher temperatures, if the concentration of CO₂ is not sufficient, the overall rate of photosynthesis will not continue to rise, hence not infinitely increasing the oxygen levels.
What best describes the temperature at which a liquid turns to gas?
A.)Melting point B.)Boiling point C.) Electrical conductivity D.)Thermal conductivity
Answer:
B) Boiling temperature.
Explanation:
Boiling temperature:
The temperature at which a liquid convert in to gas is called boiling temperature.
Ex:The boiling temperature of water is 100°C.But when we add the salt in the water then its boiling temperature will increase.
Melting temperature:
The temperature at which when solid will convert into liquid is called melting point temperature.
Select the correct statement to describe when a sample of liquid water vaporizers into water vapor
An objects velocity will not change unless it is acted upon by ( balanced or unbalanced) forces?
why did she use an infra red lamp
A satellite orbiting Earth has a tangential velocity of 5000 m/s. Earth’s mass is 6 × 1024 kg and its radius is 6.4 × 106 m.The distance of the satellite from Earth, written in standard notation, is *blank* m.
Answer:
[tex]9.6 \cdot 10^6 m[/tex]
Explanation:
we can solve the problem by equalizing the force of gravity that keeps the satellite in circular motion with the centripetal force:
[tex]G\frac{m M}{r^2}=m\frac{v^2}{r}[/tex]
where
[tex]G=6.67 \cdot 10^{-11}[/tex] is the gravitational constant
m is the satellite's mass
M is the Earth's mass
r is the distance of the satellite from Earth's center
v is the tangential velocity of the satellite
By re-arranging the formula and substituting the numbers, we find r:
[tex]r=G \frac{m}{v^2}=(6.67 \cdot 10^{-11})\frac{6 \cdot 10^{24}}{(5000)^2}=1.6 \cdot 10^7 m[/tex]
However, this is the distance of the satellite from Earth's center. Since we want to know its distance from the Earth's surface, we must subtract the value of the Earth's radius:
[tex]r'=r-R=1.6 \cdot 10^7 m-6.4 \cdot 10^6 m=9.6 \cdot 10^6 m[/tex]
The satellite's distance from Earth's surface is approximately 1.28 x 10^6 m.
Explanation:To find the distance of the satellite from Earth, we can use the formula for the speed of an object in circular motion, V = √(GM/r), where V is the speed of the satellite, G is the gravitational constant (6.67 × 10^-11 N(m/kg)^2), M is the mass of the Earth, and r is the distance of the satellite from the centre of the Earth. In this case V is given as 5000 m/s and M is given as 6 x 10^24 kg. Rearranging the formula to solve for r, we get r = GM/V^2.
Plugging in our given values: r = [(6.67 × 10^-11 N(m/kg)^2 * 6 x 10^24 kg) / (5000 m/s)^2] ~ 7.68 x 10^6 m. However, this is the distance from Earth’s centre. We must return it to the distance from Earth's surface by subtracting Earth's radius, resulting in r - Earth's radius = 7.68 x 10^6 m - 6.4 x 10^6 m ~ 1.28 x 10^6 m.
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with radiocarbon dating scintists compare an object carbon 14 levels with .....
With radiocarbon dating scientists compare an object carbon 14 levels with the fossil or rock for which the age measurement is required
Explanation:Radiocarbon, or carbon 14, is an isotope of the element carbon that is unstable and weakly radioactive. The carbon-14 method was developed by the American physicist Willard F. Libby about 1946. It can be used to determine the age of a rock or a fossil by comparing the specimen of the required or fossil and compared it with the carbon 14 sample. Carbon 14 decays at constant rate therefore an estimate of the date at which an organism died can be made by measuring the amount of its residual radiocarbon and comparing it with Carbon 14.
What are groups 1, 2, and 3 examples of on the periodic table? Question options: metals nonmetals metalloids noble gases
The force on a bullet that results from summing all of the forces on that bullet is known as the _____ on the bullet.
Answer:
The force on a bullet that results from summing all of the forces on that bullet is known as the net force on the bullet.
Explanation:
Net force represents the overall force or the total force acting on an object.
Here, the object is bullet and the net force acting on it is the addition of all the forces acting on the bullet.
1. Which one lived in Antarctica earlier, the labyrinthodont, the lystrosaurus, or the duck-billed dinosaur? Explain.
Answer:
The labyrinthodont lived in Antarctica. Its a reptile thats extinct (also one of the first to walk on land)
Explanation:
Review the image of the nitrogen cycle. Nitrogen is an important element needed for plant growth. What living organism plays a big role in adding atmospheric nitrogen to the soil?
A) Fungi
B) Animals
C) Plants, such as legumes
D) Bacteria
Nitrogen is an important element needed for plant growth. Bacteria plays a big role in adding atmospheric nitrogen to the soil.
What is nitrogen cycle?The nitrogen cycle is the biogeochemical process through which nitrogen is changed into a variety of chemical forms as it moves across ecosystems in the atmosphere, on land, and in the sea. It is possible to convert nitrogen using both biological and physical methods.
Fixation, ammonification, nitrification, and denitrification are significant nitrogen cycle processes. The greatest source of nitrogen, atmospheric nitrogen makes about 78% of the atmosphere on Earth. However, the biological use of atmospheric nitrogen is constrained, making it scarce in many different kinds of ecosystems.
Because the availability of nitrogen can influence how quickly important ecological processes like primary production and decomposition occur, ecologists are particularly interested in the nitrogen cycle.
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A bolt drops from the ceiling of a moving train car that is accelerating northward at a rate of 2.50 m/s^2. (a.) What is the acceleration of the bolt relative to the train car? (b.) What is the acceleration of the bolt relative to the earth?
The bolt's acceleration relative to the train car is 0 m/s², and relative to the Earth, it has a horizontal component of 2.50 m/s² and a vertical component of 9.81 m/s².
Explanation:The student is asking a physics question related to relative acceleration. (a) The acceleration of the bolt relative to the train car is 0 m/s² since it was initially at rest with respect to the train car before dropping. (b) The acceleration of the bolt relative to the Earth combines the acceleration due to gravity and the acceleration of the train. This results in a compound acceleration where the horizontal component is 2.50 m/s² (train's acceleration) and the vertical component is 9.81 m/s² (gravity's acceleration).
The length of a plank is measured by using a meter rule and the value obtained is reported as 2.4 m. Why is this reading inappropriately reported?
The 2.4 m measurement of a plank might be inappropriately reported if the meter rule used doesn't have the precision to report to tenths of a meter. The proper reporting of a length measurement should match the precision of the measurement tool, and include any measurement uncertainty using significant figures.
Explanation:The reading of the length of a plank measured as 2.4 m may be inappropriately reported if the measuring instrument, such as the meter rule, is not precise enough to report the measurement to the nearest tenth of a meter. When measurements yield inexact numbers, it's important to report them to the appropriate degree of precision based on the measuring tool used. A common meter stick may not have the necessary granularity to estimate beyond whole centimeters effectively, and therefore, reporting the length to a precision of tenths of a meter, like 2.4 m, might not be possible. If the meter rule used only has markings for each centimeter, the more appropriate reading would be to the nearest whole centimeter. It's also vital to include measurement uncertainty when expressing measurements, as suggested by the principles of significant figures.
Furthermore, while a meter stick is useful for measuring objects that are a few meters in length, for larger measurements, different units like kilometers might be used. For smaller measurements, centimeters or millimeters are more appropriate. The standard unit of length in the SI system is a meter, which is suitable for measuring everyday objects, like furniture or components of a small structure such as a doghouse. When a more granular measurement is required, millimeters (mm) or centimeters (cm), which are subdivisions of a meter, are used.
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a boat accelerates at a rate of 6.0m/s down a river. how much time will it take the boat to speed up to 7.0m/s?
fossil fuels are formed by the decomposition of dead plants and animals. which flow chart describes the correct energy transformation when a car burns fossil fuels to accelerate
The correct flow chart for the energy transformation, when a car burns fossil fuels to accelerate, is:
chemical energy → mechanical energy → thermal energy
When a car burns fossil fuels to accelerate, the energy transformation involves several stages. Initially, the chemical energy stored in fossil fuels, such as gasoline or diesel, is released through combustion in the car's engine. This combustion process converts the chemical energy into mechanical energy, which is utilized to move the car forward by driving the pistons, crankshaft, and ultimately the wheels.
However, not all of the mechanical energy generated is efficiently converted into kinetic energy to propel the car; some of it is lost as waste heat. This waste heat represents the thermal energy produced during the combustion process and is dissipated into the environment through the car's exhaust system and engine cooling system. Therefore, the correct energy transformation sequence is: chemical energy → mechanical energy → thermal energy.
Complete Correct Question:
Fossil fuels are formed by the decomposition of dead plants and animals. Which flow chart describes the correct energy transformation when a car burns fossil fuels to accelerate?
A. chemical energy → thermal energy → mechanical energy
B. thermal energy → mechanical energy → chemical energy
C. chemical energy → mechanical energy → thermal energy
D. thermal energy → chemical energy → mechanical energy
Based on Newton’s First Law, what would you expect to happen to a block that is pushed across ice and begins moving (You may assume there is no friction for this scenario? What would be necessary to cause the block to stop moving?
According to Newtons' first law of motion, the block needed to be pushed to move from rest. Similarly need a force to stop its motion as well due to its inertia.
What is inertia ?Newton's first law of motion states that, an object tends to stay in its state of motion or rest until an external force acts on it. This tendency to continue in the current state of the object is called its inertia.
Thus, an object at rests continue on rest if a force make it move. A stationary bus will move backwards when it is started quickly due to its inertia in rest. Similarly it will move to front when stopped suddenly.
Here, the block was initially at rest. If it is pushed it gains a kinetic energy and starts moving. When it moves with a constant speed it tends to continue in the moving and cant stop it until another force comes to stop it.
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