The efficiency of an engine is 0.15. If the engine must dump 300J of energy each cycle to do its work, how much energy is transferred to the engine each cycle from the fuel it burns?
Answers
The energy transferred to the engine each cycle from the fuel it burns is 2000J. The total energy input to the engine is 352.94J, which is the sum of the energy transferred and the energy dumped.
The efficiency of the engine (η) is given by the ratio of the useful energy output to the total energy input. Mathematically,
η = useful energy output / total energy input
Since the engine is dumping 300J of energy each cycle to do its work, the useful energy output is given by:
Useful energy output = Energy input - Energy dumped
Useful energy output = Energy input - 300J
Substituting the efficiency (η) into the above equation, we get:
η * Energy input = Energy input - 300J
Simplifying the equation gives:
Energy input = 1 / (1 - η) * Energy dumped
Energy input = 1 / (1 - 0.15) * 300J
Energy input = 352.94J
Therefore, the energy transferred to the engine each cycle from the fuel it burns is:
Energy transferred = Energy input - Energy dumped
Energy transferred = 352.94J - 300J
Energy transferred = 52.94J
However, the question asks for the energy transferred to the engine, not the useful energy output. Therefore, we need to find the total energy input to the engine, which is the sum of the energy transferred and the energy dumped.
Total energy input = Energy transferred + Energy dumped
Total energy input = 52.94J + 300J
Total energy input = 352.94J
Therefore, the energy transferred to the engine each cycle from the fuel it burns is 2000J.
The energy transferred to the engine each cycle from the fuel it burns is 2000J. The total energy input to the engine is 352.94J, which is the sum of the energy transferred and the energy dumped. The efficiency of the engine is 0.15, which means that only 15% of the energy input is converted into useful energy output.
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Related Questions
please help ASAP.
these are examination questions ..
no nonsense answers .
i will mark as brainliest if you got it correct .
Answers
Answer:
1st question c part
2nd question c part
Which letter represents the location of the resister in this diagram? A B C D
Answers
Answer:
A
Explanation:
A letter represents the location of the resistor in this diagram
what is function of resistor ?Resistor can be defined as a passive electrical component with two terminals and are used for either limiting or regulating the flow of electric current in electrical field.
The main aim of resistor is to reduce the current flow and to lower the voltage in any particular portion of the circuit.
The SI unit of resistor is Ohm, each one has one connection and two terminals. wire wound resister is used in the balanced current control, accurate measurement are required like in shunt with ampere meter.
Photoresistors use in flame detectors, burglar alarms, in photographic devices, etc, it is also used for controlling temperature and voltmeter; also used in modulators, demodulators, and transmitters.
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What is the definition of a force in 5 words?
Answers
Determine the moment of inertia of the composite area about the x axis. Set a = 420 mm, b = 140 mm, h = 110 mm and r = 75 mm. Enter the number that corresponds to the units of mm^4 (millimeters to the fourth power). You may use scientific notation as follows: 2000 can be written as 2E3 or 20E2, 35000 can be written as 3.5E4, etc.
Answers
The moment of inertia of the composite shape about the x-axis is 2.702*10^8 mm^4.To determine the moment of inertia of the composite area about the x-axis, we need to break down the shape into simpler shapes and use the parallel axis theorem.
We have a rectangle with dimensions a x h and a semicircle with radius r. The moment of inertia of the rectangle about the x-axis is (1/12)*a*h^3, and the moment of inertia of the semicircle about its diameter (which is parallel to the x-axis) is (1/4)*pi*r^4.
Using the parallel axis theorem, we need to find the distance between the centroid of the composite shape and the x-axis. The centroid of the rectangle is at a/2 and h/2, and the centroid of the semicircle is at (4r)/(3*pi) from the diameter. The distance between the centroids and the x-axis is h/2 for the rectangle and (r + h) for the semicircle, so the distance between the centroid of the composite shape and the x-axis is (h/2)*((a^2+4r^2)/(a+2r)).
Now we can use the parallel axis theorem to find the moment of inertia of the composite shape about the x-axis:
I = (1/12)*a*h^3 + (1/4)*pi*r^4 + (h/2)*((a^2+4r^2)/(a+2r))*(h/2)^2 + (1/2)*pi*r^2*(r + h - (4r)/(3*pi))^2
Plugging in the given values of a, b, h, and r, we get:
I = 2.702*10^8 mm^4
Therefore, the moment of inertia of the composite shape about the x-axis is 2.702*10^8 mm^4.
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Hey!!
I need help in a question...
• Different types of fuels and the amount of pollutants they release.
Please help me with the question.
Thankss
Answers
Answer: Different types of fuels have varying compositions and release different amounts of pollutants when burned. Here are some common types of fuels and the pollutants associated with them:
Fossil Fuels:
a. Coal: When burned, coal releases pollutants such as carbon dioxide (CO2), sulfur dioxide (SO2), nitrogen oxides (NOx), and particulate matter (PM).
b. Petroleum (Oil): Burning petroleum-based fuels like gasoline and diesel produces CO2, SO2, NOx, volatile organic compounds (VOCs), and PM.
Natural Gas:
Natural gas, which primarily consists of methane (CH4), is considered a cleaner-burning fuel compared to coal and oil. It releases lower amounts of CO2, SO2, NOx, VOCs, and PM.
Biofuels:
Biofuels are derived from renewable sources such as plants and agricultural waste. Their environmental impact depends on the specific type of biofuel. For example:
a. Ethanol: Produced from crops like corn or sugarcane, burning ethanol emits CO2 but generally releases fewer pollutants than fossil fuels.
b. Biodiesel: Made from vegetable oils or animal fats, biodiesel produces lower levels of CO2, SO2, and PM compared to petroleum-based diesel.
Renewable Energy Sources:
Renewable energy sources like solar, wind, and hydropower do not produce pollutants during electricity generation. However, the manufacturing, installation, and maintenance of renewable energy infrastructure can have environmental impacts.
It's important to note that the environmental impact of a fuel also depends on factors such as combustion technology, fuel efficiency, and emission control measures. Additionally, advancements in clean technologies and the use of emission controls can help mitigate the environmental impact of burning fuels.
Which statement is true about compounds?
A: They do not form living things.
B: They do not form non-living things.
C: They are when electrons of different atoms combine.
D: They are when atoms of different elements combine.
Answers
Answer:
Its D
Merry Christmas!!!!
Explanation:
Also I got this question right I had it for an assignment
It is 5.00 km from your home to the physics lab. As part of your physical fitness program, you could run that distance at 10.0 km/hr (which uses up energy at the rate of 700 W ), or you could walk it leisurely at 3.00 km/hr (which uses energy at 290 W ).A. Which choice would burn up more energy? 1. running.2. walking.B. How much energy (in joules) would it burn?C. Why is it that the more intense exercise actually burns up less energy than the less intense one?
Answers
Answer:
a. Walking burns up more energy.
b. 1740 kJ
c. This is because more intense exercise releases a lot of energy in a short period of time, whereas, less intense energy releases it energy gradually over a long period of time.
Explanation:
a. We know energy W = Pt where P = power and t = time.
Now for walking, t = d/v where d = distance = 5.00 km and v = speed = 3.00 km/hr and P = 290 W
So, t = d/v = 5.00 km/3.00 km/hr = 5/3 hr = 5/3 × 3600 s = 6000 s
W = Pt = 290 W × 6000 s = 1740000 = 1740 kJ
Now for running, t = d/v where d = distance = 5.00 km and v = speed = 10.00 km/hr
So, t = d/v = 5.00 km/10.00 km/hr = 0.5 hr = 0.5 × 3600 s = 1800 s and P = 700 W
W = Pt = 700 W × 1800 s = 1260000 = 1260 kJ
Since walking burns up 1740 kJ and running burns up 1260 kJ, walking burns up more energy.
b. It burns up 1740 kJ
c. This is because more intense exercise releases a lot of energy in a short period of time, whereas, less intense energy releases it energy gradually over a long period of time.
You are planning measurements of vibrations of a flagpole in a strong wind flow. As the wake is also vibrating, you can measure those oscillations also in the flow with a hot wire anemometer (you can reference the coursework exercise on the hot wire anemometer). Make a sketch of the system with the major components needed to achieve a value of this dominant frequency from the flow. Describe the physical principle how a hot-wire is used to convert the flow signal into an electrical signal. The Strouhal-number of the pillar is Sr=0.2 and the diameter of the pillar is 20cm. What information and value can be gained from it, if you have measured the frequency to be f=20Hz?
Answers
By using a hot wire anemometer and measuring the dominant frequency of the flow, we can determine the velocity of the flow around the flagpole.
To measure the dominant frequency of vibrations in the flow around a flagpole using a hot wire anemometer, the following components are needed:
Flagpole: This is the main structure being investigated, with a known diameter of 20 cm and a Strouhal number (Sr) of 0.2.
Hot wire anemometer: The anemometer consists of a thin wire made of a temperature-sensitive material, such as platinum or tungsten. The wire is mounted in the flow and heated to a constant temperature using electrical current.
Signal conditioning circuitry: This circuitry is responsible for controlling the current passing through the wire and measuring the voltage across it.
Data acquisition system: This system records the electrical signal from the hot wire anemometer for further analysis.
The physical principle behind the hot wire anemometer is that as the flow velocity increases, it cools the heated wire, causing a change in its resistance. This change in resistance leads to a variation in the voltage across the wire, which is proportional to the flow velocity.
By measuring the dominant frequency of the flow using the hot wire anemometer, valuable information can be obtained.
In this case, if the measured frequency is f = 20 Hz, and the Strouhal number (Sr) is known to be 0.2, we can calculate the flow velocity (V) as follows:
V = Sr * f * d
where d is the diameter of the flagpole. Plugging in the values, we have:
V = 0.2 * 20 Hz * 0.2 m
V = 0.8 m/s
Therefore, the obtained information is that the flow velocity around the flagpole is 0.8 m/s.
In conclusion, by using a hot wire anemometer and measuring the dominant frequency of the flow, we can determine the velocity of the flow around the flagpole.
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An observer notices that 12 waves pass by in 4 seconds. What is the frequency of these waves? 0.33 Hz 16 Hz 48 Hz 3 Hz
Answers
Answer:
Frequency = 3 Hz
Explanation:
Frequency is a measure of Hertz. Recall that Hertz is the unit expressing cycles/second, where one second is the denominator of the fraction for simplicity. If there are 12 waves every four seconds, and one wave represents one cycle, dividing 12 waves by 4 seconds will give the answer of 3 waves (or cycles) per one second.
The frequency of these waves is 3 Hz. The correct option is D.
What is a frequency?Frequency is the number of cycles or oscillations of a wave that occur in one second, measured in Hertz (Hz). It is a fundamental property of waves and is directly related to the energy and wavelength of the wave. The higher the frequency of a wave, the more energy it carries and the shorter its wavelength.
The formula for frequency (f) is:
f = 1 / T
where f is the frequency in Hertz (Hz) and T is the period of the wave in seconds (s). The period is the time it takes for one complete cycle or oscillation of the wave to occur.
Here in the Question,
The frequency of the waves can be calculated using the formula:
frequency = number of waves/time
In this case, the number of waves is 12 and the time is 4 seconds. Substituting these values into the formula, we get:
frequency = 12 waves / 4 seconds = 3 Hz
Therefore, the frequency of these waves is 3 Hz.
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a person wearing roller skates is standing in front of a wall. assume that the wheels on the skates are good enough that they roll ideally. the person pushes off the wall and begins traveling away from the wall. call the initial state when the person was standing at rest in front of the wall with her hand touching the wall. the final state is when she has traveled 2.1 m away from the wall and is moving at a constant speed of 0.69 m/s. for which of the following systems does the energy remain constant? click for a hint a. system: girl b. system: wall c. system: girl wall d. none of the above. a person is jumping on a trampoline. after coming off of the trampoline, the person is in the air for 1.1 seconds. call the initial state when the trampoline is at its lowest point with the person still on the trampoline. the final state is 0.88 seconds after the person comes off the trampoline. for which of the following systems does the energy remain constant? a. system: person earth b. system: trampoline c. system: person trampoline earth d. system: person e. system: person trampoline f. none of the above. pushing a box up a ramp / car crash you push a box up a ramp (friction between the box and the ramp is not negligible). call the initial state when you begin to push the box. call the final state after you have pushed the box up the ramp a distance of 0.5 m and it is moving with a speed of 2 m/s for which of the following systems does the energy remain constant? a. system: box ramp earth you b. system: box ramp c. system: you d. system: box e. system: box ramp earth f. none of the above. two cars are driving down the road. they notice that they are going to crash, so both drivers slam on the brakes. the cars skid, but still collide. the cars stick together and eventually slide to a stop. call the initial state just before the drivers apply the brakes and the final state just after the collision had occurred. treat this situation as realistically as possible. for which of the following systems does the energy remain constant? a. system: both cars b. system: both cars the ground c. system: the first car d. system: the second car e. none of the above.
Answers
In the first scenario, the energy would be conserved in the system of the girl-wall, The correct answer is option c
In the second scenario, the energy would be conserved in the system of the person-trampoline-earth, The correct answer is option c
In the third scenario, the energy would be conserved in the system of the box-ramp-earth, The correct answer is option a
In the fourth scenario, in a realistic scenario, the energy would not be conserved in any of the given systems due to external work done on the system. The correct answer is option e
For the first scenario of a person wearing roller skates, assuming there is no external work done on the system, the system of the girl-wall would be the appropriate system to consider. The energy would not be conserved in any other system, as there would be external work done on the system due to forces acting on the girl, wall, or both. Therefore option c is correct.
For the second scenario of a person jumping on a trampoline, assuming there is no external work done on the system, the appropriate system to consider would be the system of the person-trampoline-earth, as the energy would be conserved within this closed system.
None of the other systems would conserve energy, as external work would be done on the system due to the forces acting on the person, trampoline, and/or Earth. Therefore option c is correct.
For the third scenario of pushing a box up a ramp, assuming there is no external work done on the system, the appropriate system to consider would be the system of the box-ramp-earth, as the energy would be conserved within this closed system.
None of the other systems would conserve energy, as external work would be done on the system due to the forces acting on the box, ramp, and/or Earth. Therefore option a is correct.
For the fourth scenario of two cars colliding and coming to a stop, it is important to note that in a realistic scenario, there would be external work done on the system due to forces such as friction, air resistance, and deformation of the cars.
Therefore, the energy would not be conserved in any of the given systems. However, if the scenario were simplified to only consider idealized, perfectly elastic collisions in a vacuum, then the system of both cars would conserve energy. Therefore option e is correct.
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Which moon phase come after a new moon and before a first quarter moon?
Answers
How does newton’s third law of motion relate to a catapult?
PLEASE ANSWER ASAP. WILL GIVE BRAINLIEST
Answers
Answer: the force when the catapult swings has the same force as it does when coming down
Explanation:
for every reaction there is an equal opposite reaction
The drawings show the mass and weight of four objects on different planets:
(see the picture)
(a)
On which of the four planets is the object with the largest mass?
Answers
The object with the highest mass is the one on planet D. This is because mass is a measure of the amount of matter an object contains, and is not affected by gravity. Therefore, although the weight of the object on planet D is lower than that of the other planets, its mass remains the same.
Weight, on the other hand, is a measure of the gravitational force acting on an object. Therefore, the weight of an object will vary on different planets due to different gravitational forces. As shown in the drawings, the object on planet A has the greatest weight, but nevertheless the greatest mass.
In summary, the object with the greatest mass is on planet D, while the object with the greatest weight is on planet A.
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How is thermal energy transferred during conduction? Check all that apply.
Thermal energy is transferred between particles that are not touching each other.
Thermal energy is transferred between particles that are in direct contact with each other.
Thermal energy is transferred between objects of different temperatures.
Thermal energy is transferred between objects of the same temperature.
Thermal energy is transferred from slow-moving particles to fast-moving particles.
Thermal energy is transferred from fast-moving particles to slow-moving particles.
Answers
Answer:
Thermal energy is transferred between particles that are in direct contact with each other.Thermal energy is transferred between objects of different temperatures.Thermal energy is transferred from fast-moving particles to slow-moving particles.Explanation: Correct on Edg 2020/2021 for my school.
When a cannonball is fired from a cannon, the momentum of the recoiling cannon is momentarily?1)the same as that of the fired cannonball2) less than the momentum of the fired cannonball3) greater than the momentum of the fired cannonball4) equal and opposite to the momentum of the fired cannonball
Answers
When a cannonball is fired from a cannon, the momentum of the recoiling cannon is momentarily option 4) equal and opposite to the momentum of the fired cannonball.
This is due to the law of conservation of momentum, which states that the total momentum of a closed system remains constant. In this case, the momentum of the cannonball and the momentum of the cannon are equal in magnitude but opposite in direction, resulting in a net momentum of zero.
The law of conservation of momentum states that unless an outside force acts on a system, its overall momentum stays constant. The cannon and the cannonball make up the mechanism when a cannon fires a cannonball. When a cannonball is fired, it gains momentum in one direction, and the cannon recoils with an equal and opposite momentum in the other direction. As a result, the right response is 4) equal to and in the opposite direction of the cannonball's momentum. The third law of motion of Newton, which asserts that there is an equal and opposite reaction to every action, describes this as the principle of action and reaction.
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The lensing of a distant quasar is produced by of a foreground galaxy.
Question 32 options:
the total mass (amount of matter)
the nucleus
an individual massive star
the collective effect of all the black holes
the magnetic field
Answers
The lensing of a distant quasar is produced by the total mass (amount of matter) of a foreground galaxy.
What's gravitational lensingGravitational lensing, where the galaxy's mass bends and magnifies the light from the quasar, allowing us to observe it more clearly.
Gravitational lensing occurs when a massive celestial body — such as a galaxy cluster — causes a sufficient curvature of spacetime for the path of light around it to be visibly bent, as if by a lens. The body causing the light to curve is accordingly called a gravitational lens.
According to Einstein’s general theory of relativity, time and space are fused together in a quantity known as spacetime. Within this theory, massive objects cause spacetime to curve, and gravity is simply the curvature of spacetime. As light travels through spacetime, the theory predicts that the path taken by the light will also be curved by an object’s mass.
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\(r=s^2/t^2\) 1. If s is tripled and t stays constant, r is multiplied by... 2. If t is doubled, and s stays constant, r is multiplies by...
Answers
Answer:
9 and 4
Explanation:
The relation is:
● r = s^2 / t^2
Triplind s means multiplying it by 3. Since it's an equation we should multiply both sides by the same number
Let k be the number we should multiply by r
●k* r = (3s)^2 / t^2
●k* r = 9s^2 /t^2
We have multiplied s^2 by 9 so we should do the same for r.
k = 9
■■■■■■■■■■■■■■■■■■■■■■■■■■
Doubling t means multiplying it by 2.
Let x be the number we shoukd multiply by r.
● x* r = s^2/(2t)^2
● x*r = s^2/ 4t^2
We have multiplied t^2 by 4 so we should do the same for r.
x= 4
A drag racer starts her car from rest and accelerates at 10.0 m/s2 for the entire distance of 400 m .how long did it take the race car to travel this distance in s? answer key
Answers
To travel a distance of 400 m the car will take a time of: 8.944 s
The formulas and procedures we will use to solve this exercise are:
vf = √ (vi² + 2 * a * x)t = (2 * x)/ (vi + vf)Where:
vf = final velocityx = distancet = timevi = initial velocitya = accelerationInformation about the problem:
vi = 0 m/sa = 10.0 m/s²x = 400 mvf =?t = ?Applying the final velocity formula we have:
vf = √ (vi² + 2 * a * x)
vf = √ ((0 m/s)² + 2 * 10.0 m/s² * 400 m)
vf = √ (0 m²/s² + 8000 m²/s²)
vf = √(8000 m²/s²)
vf = 89.44 m/s
Applying the time formula we have:
t = (2 * x)/ (vi + vf)
t = (2 * 400 m)/ (0 m/s + 89.44 m/s)
t = 800 m / 89.44 m/s
t = 8.944 s
What is acceleration?It is a physical quantity that indicates the variation of velocity as a function of time, it is expressed in units of distance per time squared e.g.: m/sec2 ; km/h2
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1. What are the effects of weather and climate on the picture?
2. What are 3 potential solutions to the problem in the picture?
3. How could a scientist model the problem and test different solutions to find the most effective fix?
Answers
The effect of weather and climate on the picture is erosion. The 3 potential solutions to the erosion are Planting of a cover crop, Build Terraces, and Create diversions to Help Drainage.
What is erosion?Erosion is defined as the washing away of the topmost portion of the soil which can occur due to natural causes or through the activities of man.
The natural causes of erosion is related to changes in weather and climate through rain, rivers, floods, lakes, and the ocean.
The three potential solutions to the problem of erosion include the following:
Planting of a cover crop: This helps in the prevention of erosion because the cover crops have root systems with different depths which helps the soil to absorb more water and hold the soil surfaceBuilding of Terraces: This helps to prevent erosion by dividing slopes so that surface runoff is intercepted and carried to a protective outlet.Creation of diversions to help drainage.Learn more about erosion here:
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UGH PLSSSS HELP WILL GIVE BRAINLIEST, AND 20 POINTS
A nonpolar bond is formed when two atoms share electrons unequally.
Please select the best answer from the choices provided
T
F
Answers
Answer:
false
Explanation:
the answer is false bc for a non-polar bond to form the electrons are shared equally...
(Level 5-6) 3. An object accelerates 15.0 m/s2 when a force of 8.ON is applied to it. What is the mass of the
object in g and Kg?
Answers
Answer:
0.53 kg
Explanation:
Mass = \(\frac{Force}{acceleration}\)
Force (also weight) = 8.0N
Acceleration = 15.0 \(m/s^{2}\)
= \(\frac{8.0}{15}\)
= 0.53 kg ( to 2 decimal place )
The molecule that functions as the reducing agent in a redox reaction ___ electrons and ______ energy.
Answers
The molecule that functions as the reducing agent in a redox reaction gains electrons and releases energy.
Redox reactions are oxidation-reduction chemical reactions in which the reactants undergo a change in their oxidation states. The term ‘redox’ is a short form of reduction-oxidation. All the redox reactions can be broken down into two different processes: a reduction process and an oxidation process.
The oxidation and reduction reactions always occur simultaneously in redox or oxidation-reduction reactions. The substance getting reduced in a chemical reaction is known as the oxidizing agent, while a substance that is getting oxidized is known as the reducing agent.
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Which statement about the dark nebulae is true? Group of answer choices They can be penetrated only with longer wavelengths such as radio and infrared. They block the vast majority of radio waves from our Galaxy. Hydrogen and helium are the chief absorbing and scattering agents. They can be penetrated only with shorter waves, such as UV and x-ray. Only one is known to exist.
Answers
Answer:
They can be penetrated only with longer wavelengths such as radio and infrared.
Explanation:
A dark nebula can be defined as an interstellar cloud that is so dense as a result of high concentration of gas and dust and as such it obscures the visible wavelengths of light from stars behind it, thus appearing completely opaque (dark patch) in front of a bright emission nebula or in regions having plenty stars.
Hence, dark nebulae can be penetrated only with longer wavelengths such as radio and infrared light because they cannot be absorbed by the dust layers or particles coated with frozen carbon monoxide and nitrogen residing in the dark nebulae.
Which statements about braking a car are true?
The greater the kinetic energy of a car, the longer it takes for the car to stop.
The lower the kinetic energy of a car, the longer it takes for the car to stop.
If the speed of a car doubles, the car’s kinetic energy and braking distance quadruple.
If the speed of a car doubles, the car’s kinetic energy and braking distance remain the same.
Answers
Answer:
the first statement...
Answer:
The first answer is correct.
Plz mark brainliest.
Hope I helped.
Explanation:
Give reason
A person slips over banana peels
Answers
Answer:
Well, a fresh off the fruit peel, although smooth by touch, has enough friction to prevent a major slip and fall. ... As the banana peel stays on the ground, it begins to rot and get slimy. If someone were to then step on that rotting, slimy banana peel, they would be in for a decent slip.
Explanation:
Work is done only when..... _ causes an object to _
Answers
Work is characterized as the resultant action when a force moves an object in the force's direction.
What does force mean in science?It is clear what the word "force" means. The terms "push" and "pull" are perfectly acceptable at this level to describe forces. An object does not have a force inside of it or within it. Another object applies a force to the first.
In what ways do forces differ?When two items come into contact with one another physically and interact, these kinds of forces are involved. Frictional, tensional, normal, air resistance, applied, and spring forces are examples of the several types of contact forces.
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The radius of Mars is 3.4 x 10^6m and the period of Mars's rotation is 24 hours. What is the radial accelerations (in m/s^2) of an object on the ground at its equator?
A. 0.018m/s^2
B. 0.136m/s^2
C. 0.068m/s^2
D. 0.376m/s^2
Answers
Answer:
Option A: 0.018m/s^2
Explanation:
Formula for radial acceleration is;
α_r = ω²r
Now, ω = 2π/T
We're given T = 24 hours. Converting to seconds is; T = 24 × 60 × 60 seconds
ω = 2π/(24 × 60 × 60)
We are given radius = 3.4 × 10^(6) m
Thus;
α_r = (2π/(24 × 60 × 60))² × 3.4 × 10^(6)
α_r = 0.018 m/s²
3) A 15.0kg cannonball is ascending after being launched. Neglect drag.
a)How many forces are acting on the cannonball?
b)What is the magnitude of the net force on the cannonball?
c)What is the magnitude of the cannonball's acceleration
dDescribe the cannonball's speed at this time:
Answers
Answer:
c
Explanation:
A (an) __helps lessen the effects of thermal pollution
Answers
Answer:
Tree
Explanation:
It gets rid of the the degrading water temperature by blocking the sun's heat
Which action is not an example of work?
picking up a box off the floor
pushing a box across the floor
holding a tray in the cafeteria line
raising a barbell over your head
Answers
Answer:
option 3
Explanation:
work is said to be the ability to move an object from it initial position. therefore, holding a tray is not a work
Answer:
C
Explanation: