Help Please..?
A 20-kg barrel is rolled up a 20-m ramp to the back of a truck whose floor is 5.0 m above the ground. What work is done in loading one barrel into the truck?
A:980J
B:19,600J
C :4900J
D :imposible to tell because velocity is not given.,
Question 3 Unsaved
Which type of galaxy is the Milky Way ?
Question 3 options:
elliptical
satellite
irregular
spiral
The net force acting on a 5 kg discus is 50 n. what is the acceleration of the discus
Final answer:
The acceleration of the 5 kg discus is 10 m/s², calculated using Newton's second law of motion.
Explanation:
The acceleration of the 5 kg discus can be found using Newton's second law of motion, which states that the net force acting on an object is equal to the product of its mass and its acceleration (F = ma). Given the net force (50 N) and the mass of the discus (5 kg), we can rearrange the formula to solve for acceleration (a = F/m).
Now, substituting the given values into the equation, we have:
a = 50 N / 5 kg
After performing the calculation, the acceleration of the discus is:
a = 10 m/s
Which best describes the forces identified by Newton’s third law of motion?
equal and acting on different objects
equal and acting on the same object
unequal and acting on different objects
unequal and acting on the same object
Best answer is A: Equal and acting on different objects
Explanation, according to the third law of motion, this is how it works.
I can also confirm that I have tested on this question and got 100% on that test, so this answer has to be correct.
The forces identified by Newton’s third law of motion is best describes equal and acting on different objects.
What is Newton’s third law of motion?If an object exerts a force on another object, then another object must exert a force of equal magnitude and opposite direction back on first object.
Example of Newton’s third law of motion are
A swimmer moves forward by pushing off the side of pool. This way, the wall pushes in opposite direction and giving acceleration.Rockets move forward by expelling gas backward at high velocity. That means, the rocket exerts a large backward force on the gas in the rocket combustion chamber, and the gas thereby exerts a large reaction force forward on the rocket. This reaction force is called thrust.Helicopters create lift by pushing the air downward, therefore facing an upward reaction force. Birds fly by exerting force on air in a direction opposite to that of whatever force they need. The wings of a bird force air down and backward in order to get lift and forward motion.To learn more about Newton’s third law of motion here
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a machine does 1500 joules of work in 30 second What is the power of the machine
The power of the machine is calculated as the work done divided by the time taken, which in this case is 50 watts for a machine that does 1500 joules of work in 30 seconds.
Explanation:To calculate the power of the machine, we need to use the formula power equals work done divided by time taken. In this scenario, the machine does 1500 joules of work in 30 seconds. Using the definition of power (1 watt = 1 joule/second), we can compute the machine's power output.
Power = Work / Time
Power = 1500 joules / 30 seconds
Power = 50 watts
The power of the machine is 50 watts.
The radio source ________ is located in a place consistent with the center of our galaxy.
PLEASE HELP WILL MEDAL !!!
In the water cycle, which state of matter is water vapor?
solid
liquid
gas
plasma
Which was an idea used to promote the theory of plate tectonics
A. Mountain ranges linking in England and America
The theory of plate tectonics was promoted by the idea of continents drifting over time, which was proposed by Alfred Wegener. This concept was supported by evidence from fossils and rock formations, eventually leading to the development of the theory of plate tectonics.
Explanation:One idea used to promote the theory of plate tectonics is the concept of continents drifting over time. This idea was first proposed by Alfred Wegener in the early 20th century. He pointed out that the continents appeared to fit together like puzzle pieces, and he used evidence from fossils and rock formations to support his hypothesis of continental drift. Eventually, this idea led to the development of the theory of plate tectonics, which explains how the Earth's crust is divided into several plates that move and interact with each other.
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A battery charger is connected to a dead battery and delivers a current of 3.5 a for 4 hours, keeping the voltage across the battery terminals at 16 v in the process. how much energy is delivered to the battery?
The energy delivered to the battery by the charger is calculated using the formula E = P times t, with P = I times V. It turns out to be 806,400 joules.
The question involves calculating the energy delivered to a battery by a battery charger. To find this, we use the formula Energy (E) = Power (P) times Time (t), where Power (P) is the product of the current (I) and the voltage (V). Here, the battery charger delivers a current of 3.5 A for 4 hours (time) and maintains a constant voltage of 16 V. Therefore, we calculate the energy as follows:
Energy (E) = Power (P) times Time (t)
Power (P) = Current (I) times Voltage (V) = 3.5 A times 16 V
Energy (E) = (3.5 A times 16 V) times 4 hours
Energy (E) = 56 W times 4 hours = 224 Wh
Since 1 Wh = 3600 J, Energy (E) = 224 times 3600 J
Energy (E) = 806,400 joules
So, the battery charger delivers 806,400 joules of energy to the battery.
If you put a ballon in the freezer, what happens to the gas pressure in the ballon?
if you look inside the bowl of a shiny metal spoon, your image is upside down. if you look at the outside of the bowl, your image is right side up. explain.
________ occurs when the horizontal winds move air against mountain ranges, forcing air to rise as it passes over the mountains.
Amy throws a softball through the air. What are the different forces acting on the ball while it’s in the air? The softball experiences force as a result of Amy’s throw. As the ball moves, it experiences from the air it passes through. It also experiences a downward pull because of . NextReset
Answer:
As the ball moves, it experiences from the air it passes through. It also experiences a downward pull because of gravity
Explanation:
When Amy throws a ball in the air then initially the force is applied by Amy to accelerate the ball in the air.
Now after throwing into the air the ball will have forces as per the FBD
Ball will have a downward force which is due to gravity and its magnitude is always remains the same
Now ball also have another force opposite to the direction of motion due to air drag.
This air drag force depends on the speed of the ball and always opposite to the velocity of the ball.
so correct answer will be
As the ball moves, it experiences from the air it passes through. It also experiences a downward pull because of gravity.
The blocking of sunlight to earth that occurs when the moon is directly between the sun and earth
3. Which of the following statements about features on the sun is true?
A.) Prominences look dark in regular photographs.
B.) Solar flares form when prominences connect.
C.) The number of sunspots on the sun's surface is always the same.
D.) Sunspots can greatly increase the solar wind.
Please Help Me Out!
If you put in 10 J of work to push 1 c of charge against and electric field what will be its voltage with respect to its starting position?when released, what will be it’s kinetic energy if it flies past it’s starting position?
Answer:
Explanation:
A one volt change in potential means that the potential electrostatic energy changes by one Joule per Coulomb.
Since you would be pushing the charge against the field, and expend 10 J, the voltage would be 10 Volts higher.
That 10 J will be converted to kinetic energy if the charge flies back to the starting position without friction.
Final answer:
The voltage created when pushing 1 C of charge with 10 J of work is 10 V. Upon release, if no other forces act on the charge, it would have a kinetic energy of 10 J when it flies past its starting position.
Explanation:
When 10 J of work is done to push 1 C of charge against an electric field, the voltage (or electric potential difference) with respect to its starting position can be found using the formula V = W/Q, where V is the voltage, W is the work done, and Q is the charge. Therefore, V = 10 J / 1 C = 10 V.
According to the principle of conservation of energy, if no other forces act on the charge when it is released, all the potential energy will be converted into kinetic energy as it flies past its starting position. Therefore, the kinetic energy (KE) at that point will be equal to the work previously done on the charge, so KE = 10 J.
during a neap tide, which phase could the moon be in? select all that apply
a. new
b. third quarter
c. first quarter
d. full
Answer:
b. third quarter
c. first quarter
Explanation:
Neap tides happen in the third and first quarter of the moon phase, when the moon appears to be half full, this is because of the position of the moon and the gravitational force of the moon attracting the tides along with the gravitational force of the sun, tha causes high tides on new, and full phases, but the third quarter and first quarter, the moon makes a 90º line with the solar gravitational forces, cancelling out both forces making it low tide or neap tide.
The area around a charged object that can exert a force on other charges objects is an electric_____.
The answer is Electric force.
how can you find the total displacement during the time interval of a graph?
please help totally lost :/
Answer:
Area under v-t graph = total displacement
Explanation:
The area under velocity time graph gives the total displacement of any object. Th attached figure shows a velocity time graph. In which the y axis shows the velocity and x axis shows the time taken.
The velocity is from 0 to 20 m/s and time is from 0 to 15 s. The total displacement is given by the area of region OABC.
So, d = 2 × area of triangle + area of rectangle
[tex]d=2\times \dfrac{1}{2}\times 5\times 20+5\times 20[/tex]
d = 200 m
The total displacement covered by an object in this case is 200 m. Hence, the total displacement during the time interval of a graph can be determined by v-t graph.
Calculate the force on an object that has a mass of 12 kg and an acceleration of 4 m/s^2
The difference in temperature between 100°C and 101°C is _____ the difference between 100K and 101K.
You are standing in front of a flat large mirror. As you step 1.0 m farther from the mirror, the distance between you and your image changes by __________.
(Points : 1)
0 m
1.0 m
2.0 m
0.5 m,
A wrench reduces the force needed to tighten a bolt. For this statement to be true, the wrench _____. A. decreases the input force and decreases the input distance B. increases the input force and decreases the input distance C. increases the input force and increases the input distance D. decreases the input force and increases the input distance
Answer:
D
Explanation:
Just looking at the physics of a wrench, it allows us to apply a turning force to an object. The reason a wrench is helpful is that it allows us to create a greater turning force, without necessarily changing the force applied to it.
Using the formula:
Fm = The moment of a force (the turning force)
F = The force applied
d = Distance from the fulcrum that the force is applied
Fm = F x d
This formula basically states that, if the moment of the force (output force) stays constant, then the force must decrease, if the distance increases.
Hence, the further away from the fulcrum that the force is applied (increase input distance), the less force needs to be applied (decrease input force).
Which phrase best describes a savanna biome?
In the following figure, what is the value of the potential at points a and b?
(Figure 1)
picture a square.There is a 15 v battery on the left side, a 4ohm resistor on top, a 5v battery on the right side and a 1 ohm resistor on bottom.
I need the potential at the upper right corner, and then the potential at the lower left corner.
The potential at point a is 2V, and the potential at point b is 6V.
The circuit has two voltage sources (9V and 6V) and two resistors (2Ω and 1Ω).
To find the potential at point a (the upper right corner), we can use the voltage divider formula: V_a = (6V × 1Ω) / (1Ω + 2Ω) = 2V
To find the potential at point b (the lower left corner), we can again use the voltage divider formula: V_b = (9V × 2Ω) / (1Ω + 2Ω) = 6V
If we changed the 1Ω resistor to a different value, it would affect the voltage drop across it, and therefore the voltage at point b. For example, if the bottom resistor was 0.5Ω instead of 1Ω, the voltage at point b would be higher than 6V. also if the bottom resistor was 2Ω instead of 1Ω, the voltage at point b would be lower than 6V.
Although objects can go through physical and changes, the amount of matter in those objects remains the same. This is known as the Law of Conservation of Matter. Matter can be broken into smaller pieces, dissolve in liquids, change physical states, and undergo other changes while still conserving its mass. Which pairs of matter demonstrate the law of conservation? * A structure made of building blocks * The blocks of the same structure bundled in a pile with the extra binding material * A snowman * The melted remains of the same snowman * A lump of clay * The same lump broken into three pieces * 1 cup of water and one gram of salt, separated * The same cup of water with two grams of salt mixed in * A lump of clay * An identical lump added to the original * One apple * The same apple cut into slices Submit An
Answer:
A snowman
* The melted remains of the same snowman
A lump of clay
* The same lump broken into three pieces
One apple
* The same apple cut into slices
Explanation:
HELP PLEASE .
Which of the following is an example of transuranium element ?
Samarium
Uranium
Thorium
Curium
Curium is the first transuranium element, with an atomic number of 96.
Hence, the correct option is D.
Samarium, uranium, and thorium are all elements with atomic numbers less than 92, which is the atomic number of uranium. Curium is the first transuranium element, with an atomic number of 96. It was discovered in 1944 by Glenn T. Seaborg and his colleagues at the University of California, Berkeley.
Curium is a radioactive element that decays into other elements, such as plutonium and barium. It has a variety of applications, including in nuclear weapons and medical research.
The other elements in the question are not transuranium elements. Samarium is an lanthanide element with an atomic number of 62. Uranium is an actinide element with an atomic number of 92. Thorium is an actinide element with an atomic number of 90.
Therefore, Curium is the first transuranium element, with an atomic number of 96.
Hence, the correct option is D.
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Which of the following materials is not a fluid
A. Air
B. Cork
C. Gasoline
D. Water
it has to be a cork, because air is gaseous, and can be liquidized due to the large quantity of oxygen that makes it up
Today's Apple Mac computers run with the same internal hardware as the Windows-based PC.
(Points : 2)
True
False
I think it true
If the man on the left pulls on the object with a force of 500 N and the man on the right pulls on the object with a force of 750 N, what is the net force exerted on the object?
A.
1250 N to the right
B.
1250 N to the left
C.
250 N to the right
D.
250 N to the left