If an object is moving with uniform circular motion, the mechanical work on the object due to centripetal force is zero
W = F d cos θ
W = Work done
F = Force
d = Distance
θ = Angle between force and displacement vector
In a circular motion, the centripetal force acts towards the center of the motion at any point in its motion.
The radial displacement at any point in the motion is tangential to the direction of motion. This means that the force and displacement vector are perpendicular to each other.
θ = 90°
W = F d cos 90°
W = 0
Therefore, if an object is moving with uniform circular motion, the mechanical work on the object due to centripetal force is zero
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99. The centripetal acceleration of a ball of mass m moving at constant speed v in a horizontal circular path of radius r is
(1) zero
(2) constant in direction, but changing in
magnitude
(3) constant in magnitude, but changing in
direction
(4) changing in both magnitude and direction
The centripetal acceleration of a ball of mass m moving at constant speed v in a horizontal circular path of radius r is constant in direction, but changing in magnitude.
What is magnitude ?A mathematical object's magnitude or size is a characteristic that indicates whether it is bigger or smaller than other objects of the same kind. Formally speaking, the size of an object is the visible outcome of an ordering—of the class of objects to which it belongs.
A magnitude is a measurement of a quantity's size. For instance, an earthquake's Richter scale magnitude, which reflects the size of the earthquake and typically ranges from 1 to 10, is measured. A magnitude 8 earthquake is far more problematic than a magnitude 3 earthquake.
Thus, option 2 is correct.
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What a mechanics error is when writing?.
Mechanics error is referred to as the parts of speech and how they combine to form sentences.
Writing with great structure and syntactic redress is exceptionally vital for everybody. Understanding the thoughts that the students need to communicate in their essays will be easier when they are conveyed with the right grammar. Mechanical errors are diverse from grammatical errors. Grammar is the structure of written or talked language. It alludes to the parts of speech and how they combine to make sentences. Mechanics allude to the rules of the composed language, such as capitalization, accentuation, and spelling.” Since mechanics are the portion of composing, students moreover utilize mechanics in their exposition composing in arrange to deliver clearer intended messages. In this manner, this present study too centered on mechanical perspectives which contain capitalization, accentuation, and spelling.
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Why were the principal in the north american model of wildlife conervation developed
When many animal species were in grave decline or on the verge of extinction due to unchecked overharvesting and negligent land use practises, the idea of wildlife and habitat conservation in North America emerged out of need. In order to combat the fast reduction of wildlife, early conservation pioneers like George Bird Grinnell and Theodore Roosevelt, who founded the Boone and Crockett Club in 1887, did not deliberately set out to construct this Model by name. What is now known as the North American Model is the outcome of their labour and that of many others. Due to his efforts to institutionalise and popularise conservation and to increase the protection, then management, of natural resources, President Theodore Roosevelt was one of the main figures in the conservation movement.
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a frozen lake in winter with fish swimming below the surface is possible because of which property of water: a frozen lake in winter with fish swimming below the surface is possible because of which property of water: surface tension cohesion adhesion hydrogen bonding
A frozen lake in winter with fish swimming below the surface is possible because of cohesion.
What is cohesion ?Water molecules have significant cohesive forces as a result of their capacity to establish hydrogen bonds with one another. Cohesion is the scientific term for the attraction of molecules towards other molecules of the same kind.
Cohesion is the ability to cooperate. You are exhibiting high cohesion if your group of pals enters the lunchroom as a unit and seats together. The term "cohesion" is derived from physics, where it refers to similar particles that have a propensity to adhere to one another, such as water molecules.
Water binds to each other with a strong attraction called a hydrogen bond. Water is very cohesive as a result.
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each pane in a double-hung wood window measures 20" x 16". calculate the rough opening for this window
The rough opening for this double-hung wood window that measures 20" x 16" is 26" x 42"
For a window to be hanged on wall, a larger dimension than window has to be considered. The extra dimension which are considered for window are used for fittings of frame. Double hung windows are commonly used nowadays.
The extra addition to height is 10" and to width is 6"
Window size = 20" * 16"
Final minimum width = 20" + 6" = 26"
Final minimum height = 16" + 6" = 22"
The minimum opening for this window = 26" * 22"
Therefore, the rough opening for this window is 26" * 22"
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this image shows pluto photographed by the new horizons spacecraft in 2015. what did scientists find most surprising when they saw this image?
The scientists found most surprising when they saw this image of Pluto photographed by the new horizons spacecraft in 2015 is that Pluto and its satellites are much more complicated than we anticipated.
What are the some facts of Pluto?Pluto and its satellites are much more intricate than we anticipated. It is simply remarkable how active Pluto's surface is right now and how young certain of its surfaces are. All pre-flyby models are disproved by Pluto's atmospheric hazes and lower atmospheric escape rate than expected.
A ancient water ice ocean that once existed inside of Charon may have frozen long ago, according to the planet's massive equatorial extensional tectonic belt. A water-ice ocean may still exist inside Pluto today, according to additional data from New Horizons.
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which of the following provides evidence that there must be at least two types of electrical charge, but that there is only one type of mass?
The correct option is option D.
The statement that provides evidence that there must be at least two types of electrical charge, but that there is only one type of mass is that on the scale of the solar system, electric forces cancel out and gravitational forces dominate.
The examples that provides conclusive evidence of is option d because the Gravitational force constant is (G)=6.67*10-11 while the Coulomb's law constant(K)=9*109.
Coulomb's law often connotes that the electrical force between two charged objects is directly proportional to the product of the quantity of charge on the objects and inversely proportional to the square of the separation distance between the two objects.
Therefore, the interaction between charged objects is regarded as a non-contact force that acts over some distance of separation. And hence, option D : the scale of the solar system, electric forces cancel out and gravitational forces dominate is the correct option.
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[THIS IS AN INCOMPLETE QUESTION.
THE COMPLETE QUESTION IS: Which of the following provides evidence that there must be at least two types of electrical charge, but that there is only one type of mass?
A.) The magnitude of the Coulomb's law constant differs greatly from the magnitude of the universal gravitational constant.
B.) Contact forces such as friction are caused primarily by electrostatic forces and not by gravitational ones.
C.) The electric force has a relative strength that is much greater than the strength of the gravitational force.
D.)On the scale of the solar system, electric forces cancel out and gravitational forces dominate.]
a typical circular saw has a radius of 0.184 m and rotates so the velocity of its edge is 110 m/s. how many rpm does the saw make?
The speed of the saw is 5710 rpm.
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a soccer player kicks a rock horizontally off a 40.0-m high cliff into a pool of water. if the player hears the sound of the splash 3.00 s later, what was the initial speed given to the rock? assume the speed o
According to the given statement 9.91m/s was the initial speed given to the rock.
What is speed in physics and its unit?The pace at which a distance changes over time is referred to as speed. It has a dimension of time-distance. As a result, the fundamental unit of time or the basic unit de distance are combined to form the Vernier scale of speed. Thus, the metre per second (m/s) is the Standard unit of speed.
Briefing:y[tex]_f[/tex] = y[tex]_i[/tex] + v[tex]_y_i[/tex]t + 1/2 at²
-40.0 m = 0 + 0 + 1/2 (-9.80m/s²)t²
t = 2.86s
The additional time needed for the sound she hears to return directly to the player is
3.00s-2.86s=0.140s.
It travels a long way
(343m/s)0.143s=49.0m= √x²+(40.0m)²
where x is the rock's horizontal travel distance. x=28.3m is obtained by solving for x. The rock is in flight for 2.86 seconds and moves horizontally while maintaining a constant velocity in the x direction.
x=28.3m=v[tex]_x_i[/tex]t+0t²
v xi = 28.3m / 2.86s
=9.91m/s
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b. the mass of a small piece of wood and a beaker of water is equal to the mass when the wood is floating in the beaker of water
When the wood is floating in the beaker of water then force is balanced.
What is force?A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.
The mass of a small piece of wood and a beaker of water is equal to the mass when the wood is floating in the beaker of water, upward force is balanced by downward force so floating happen.
When the wood is floating in the beaker of water then force is balanced.
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Measurements on the cornea of a person's eye reveal that the magnitude of the front surface radius of curvature is 7.84 mm , while the magnitude of the rear surface radius of curvature is 7.24 mm (see (Figure 1) ), and that the index of refraction of the cornea is 1.38.
Part A
If the cornea were simply a thin lens in air, what would be its focal length?
Express your answer in millimeters to three significant figures.
___ mm
Part B
If the cornea were simply a thin lens in air, what would be its power in diopters?
Express your answer in diopters to three significant figures.
_____diopters
Part C
If the cornea were simply a thin lens in air, what type of lens would it be?
The lens is converging.
The lens is diverging.
Part 'A'- the focal length would be 7.07mm. Part 'B' - the diopters would be 0.5 diopters. Part 'C' - the lens would be a converging lens.
The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber. Despite injury or disease, the cornea can still repair itself quickly. However, there are situations where damage is too severe for the cornea to heal on its own – such as with a deep injury to the cornea. The following symptoms may indicate that the cornea has sustained a substantial infection, injury or disease: Blurred vision Pain Redness.
Along with the anterior chamber and lens, the cornea refracts light, accounting for approximately two-thirds of the eye's total optical power. In humans, the refractive power of the cornea is approximately 43 diopters.
Refer to the image of cornea attached.
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a baseball with a mass of 145 g is thrown horizontally with a speed of 40.6 m/s (91 mi/h) at a bat. the ball is in contact with the bat for 1.20 ms and then travels straight back at a speed of 45.1 m/s (101 mi/h). determine the average force exerted on the ball by the bat. neglect the weight of the ball (it is much smaller than the force of the bat) and choose the direction of the incoming ball to be positive. (indicate the direction with the sign of your answer.)
Average force exerted on the ball by the bat will be 543N.
Force is defined as the push or pull which is applied to the body. It is the product of mass and rate of change of velocity. Sometimes it can be use to change the shape, size, and direction of the body. It is defined as the product mass and acceleration. It's unit is Newton.
m is the mass of the baseball = 145g = 0.145g
u is the initial velocity of the baseball = 40.6m / s
v is the final velocity of the baseball = 45.1 m/s
t is time of contact = 1.20ms =1.20 × 10-³s
The average force mathematically given as
F = (m(v - u))/t
F = (0.145(45.1 - 40.6)) / (1.20 × 10-³ )
F = 543N
Hence, the average force exerted on the ball by the bat will be 543N.
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an 18-cm-long bicycle crank arm, with a pedal at one end, is attached to a 20-cm-diameter sprocket, the toothed disk around which the chain moves. a cyclist riding this bike increases her pedaling rate from 60 rpm to 88 rpm in 15 s. assume constant angular acceleration.
The angular acceleration of the crank arm is 0.96 rad/s^2
What is angular acceleration?
In physics, angular acceleration is the rate at which angular velocity changes over time. Naturally, there are two types of angular acceleration, referred to as spin angular acceleration as well as orbital angular acceleration, just as there are two types of angular velocity, notably spin angular velocity as well as orbital angular velocity. As opposed to orbital angular acceleration, which is the angular acceleration of the a point particle about a fixed origin, spin angular acceleration describes the angular acceleration of the a rigid body as to its centre of rotation. The unit of measurement for angular acceleration is the angle per unit time squared, and it is typically denoted by the symbol alpha (). When the angular speed changes from increasing counterclockwise to decreasing clockwise in two dimensions, the pseudoscalar known as angular acceleration is assumed to have a positive sign.
The angular acceleration of the crank arm is:
a = (88rpm - 60rpm) / 15s = 0.96 rad/s^2
The angular velocity of the crank arm after 15 seconds is:
ω = 60rpm + (0.96rad/s^2) * 15s = 113.4 rpm
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Imagine that you visit an alien world that has an atmospheric composition similar to that of Earth (that is, mostly nitrogen and oxygen) and a surface atmospheric pressure of 1.2 bars. Which of the following statements best describes the effects of this pressure?
It will feel quite similar to the atmospheric pressure on Earth.
It will feel quite similar to the atmospheric pressure on Earth.
What is the difference between air pressure and atmospheric pressure?Air pressure is the force of the air around us, whereas atmospheric pressure is the force of the earth's atmosphere. Tore gauges are used to measure air pressure, while mercury barometers are used to measure atmospheric pressure.The molecules and atoms that make up the many layers of the atmosphere are continually moving in arbitrary directions. Despite their small size, when they hit a surface, they apply pressure that humans perceive as a force.The planet's mass, the surface's radius, the quantity, composition, and vertical distribution of the atmospheric gases, as well as the planet's gravitational influence on those gases, determine atmospheric pressure.To learn more about atmospheric pressure. refer,
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in certain cyclotron a proton moves in a circle of radius 0.39m. the magnitude of the magentic field is 1.40t. a) what is the oscillator frequency
The oscillator frequency, according to the statement, is 2.13×10⁷ Hz.
What kinds of fields are there?According on whether the reported weight of an object is a scalar, vector, spinor, or tensor, respectively, a field can be categorized as a numerical solution, vector field, spinor field, or tensor field.
What does a work field mean?Career sectors are means of classifying various career kinds based on shared characteristics. People can use these categories to help them focus their professional options and select a suitable route. Career fields make it simple for people to categorize the many forms of labor for better comprehension.
Briefing:
f=[tex]\frac{qb}{2\pi m}[/tex]
[tex]$\begin{aligned} f &=\frac{1.6 \times 10^{-19} \times 1.4}{2 \pi \times 1.67 \times 10^{-27}}\\ f &=2.13 \times 10^7 \mathrm{~Hz} \end{aligned}$[/tex]
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1.2 assuming the flow to be laminar, determine the flow rate through the pipe by considering only frictional losses. flow is assumed to steady and uniform throughout the pipe.
Pipe flow is considered laminar flow when the Reynolds number is less than 2000 and fully turbulent when it exceeds 4000.
If the value is between these two values, the flow characteristics are unpredictable. In pipes (or tubes), laminar flow or streamline flow occurs when a fluid flows in parallel layers with no disruption between them. So, if the flow is steady (that is, the flow parameters such as velocity, pressure, and temperature do not change over time), then the flow is laminar. In contrast to laminar flow, turbulent flow is always characterised by random fluctuations in the flow parameters (velocity, pressure, temperature).
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What is a spectrum?Question options:A) A spectrum is the pattern of colors produced when light shines through a prism.B) A spectrum is the pattern of colors produced when light shines through a diffraction grating.C) A spectrum is a device used to study the constituent colors of light.D) A spectrum is the pattern of directions that light travels after reflecting off a surface.E) A & BE) A & B
The correct option is option B.
Spectrum is the pattern of colours produced when light shines through diffracting grating.
The phenomenon due to which white light splits into seven colours on passing through a prism is called dispersion. White light is made up of seven bands of colors each having different wavelengths. Upon passing through a medium, each of the colors travels at different speeds and hence has different angles of refraction leading to the splitting of the light i.e. dispersion.
This light shows some particular pattern and the pattern is spectrum.
When the light passes through prism, the spectrum of seven colours can be seen. These colours are put up in a particular pattern and the colours form a pattern of VIBGYOR.
Therefore, whenever a light is passed, it shows a pattern in which it gets reflected. This pattern is the spectrum.
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in a ballistic pendulum experiment, projectile 1 results in a maximum height h of the pendulum equal to 2.6 cm. a second projectile (of the same mass) causes the the pendulum to swing twice as high, 5.2 cm.
The second projectile is 1.4 times faster than first projectile.
Initial velocity of projectile is proportional to the square root of height covered by pendulum.
From the question, we have
U_2/U_1 =√(h_2/h_1 )
U_2 =√(h_2/h_1 )×U_1
U_2 =√(5.2/2.6)×U_1
U_2= 1.41U_1
The second projectile is 1.4 times faster than first projectile.
Projectile:
The object that is propelled by the application of an external force and then moves freely while being affected by gravity and air resistance is referred to as a projectile. Despite the fact that all items traveling through space are projectiles, they are frequently used in sports and warfare.
Complete question:
In a ballistic pendulum experiment, projectile 1 results in a maximum height h of the pendulum equal to 2.6 cm. A second projectile (of the same mass) causes the the pendulum to swing twice as high, h2 = 5.2 cm. The second projectile was how many times faster than the first?
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A table-tennis ball is thrown at a stationary bowling ball: The table- tennis ball makes a one-dimensional collision and bounces back along the same line: Compared with the bowling ball after the collision; the table- tennis ball has the same magnitude of momentum: larger magnitude of momentum: a smaller magnitude of momentum a magnitude of momentum impossible to determine'
Less momentum in magnitude and more kinetic energy. Because it is heavier, the bowling ball has more kinetic energy. As mass grows, kinetic energy rises. Kinetic energy is also impacted by velocity.
You must throw the bowling ball farther or with more force if you want it to move faster. The sum of an object's mass and velocity is considered to be its linear momentum, translational momentum, or simply momentum in Newtonian physics.It is a vector quantity since it has both a magnitude and a direction. If m is the object's mass and v is its velocity, then p=mv is the definition of the object's momentum.The unit used to measure momentum is the kilograms meter per second (kg m/s), also known as the newton-second in the International System of Units (SI).Newton's second law of motion states that the rate of change of a body's momentum is equal to the net force applied to it.To know more about momentum
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a coin lies submerged at the bottom of a pan of water. does refraction of light from the coin make it appear deeper or shallower than it really is?
When a coin lies submerged at the bottom of a pan of water, refraction of light from the coin make it appears shallower than it really is.
What is refraction?Refraction is defined as "the change in a wave's direction as it passes through a medium."
Although light refraction is one of the most frequently seen phenomena, refraction can also occur with sound and water waves.
Due to the fact that light rays emerging from water will immediately turn towards the water's surface. They don't move straight ahead. (Glass experiences the same phenomenon; this is how lenses are produced.)
The bottom of the pan's light beams arc in the direction of the water's surface. As a result, the ray appears to have come from a higher location to you. So it appears to be shallower.
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A fire breaks out and increases the Kelvin temperature of a cylinder of compressed gas by a factor of 1.2. What is the final pressure of the gas relative to its initial pressure?
A fire breaks out and increases the Kelvin temperature of a cylinder of compressed gas by a factor of 1.2. The final pressure of the gas relative to its initial pressure will be [tex]P_{2} = 1.4 P_{1}[/tex].
Given
The temperature increases by a factor of 1.2 of a compressed gas.
Or we can say that [tex]T_{2}= 1.2 T_{1}[/tex]
Where [tex]T_{1}[/tex] = Initial temperature
and [tex]T_{2}[/tex] = final temperature
we know the ideal gas equation is [tex]PV=nRT[/tex]
Where V= volume (constant) , n=constant , R=gas constant
Or P/T = constant
We can write, [tex]\frac{P_{1} }{T_{1} } =\frac{P_{2} }{T_{2} }[/tex]
[tex]P_{2}=\frac{T_{2} }{T_{1} } (P_{1} )[/tex]
So, [tex]P_{2} = 1.4 P_{1}[/tex]
Hence, the final pressure of the gas relative to its initial pressure will be [tex]P_{2} = 1.4 P_{1}[/tex].
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how does the energy jupiter radiates back to space compare to the energy from the sun that falls on it?
Jupiter creates a lot of internal heat and releases this heat in the form of thermal radiation. It has been found to radiate twice as much energy as it absorbs from the sun.
Which planets produce internal heat?
Major internal heat sources on Jupiter, Saturn, and Neptune allow them to absorb as much (or even more) energy as they absorb from solar radiation. It was discovered that not only do Saturn and Neptune emit roughly twice as much energy as they take in from the sun, but also Uranus and Pluto do the same.
What amount of thermal energy does Jupiter produce?
Jupiter generates about 6 Watts per square meter of internal heat. Jupiter receives approximately 10 watts of solar energy per square meter. The radiation emitted by this planet is equal to 100 million X-rays.
Jupiter absorbs light energy from the sun and creates a large amount of internal heat. The extra energy is released in the form of thermal radiation.
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Jupiter generates a lot of heat inside and gives off this heat in the form of thermal radiation. It is known that it radiates twice as much energy as she absorbs from the sun.
Which planets produce internal heat?
The large internal heat sources of Jupiter, Saturn and Neptune allow them to absorb as much (or more) energy as they absorb from solar radiation. Saturn and Neptune, as well as Uranus and Pluto, are known to emit about twice as much energy as they absorb from the Sun.
How much heat energy does Jupiter produce?
Jupiter produces about 6 watts of internal heat per square meter. Jupiter receives about 10 watts of solar energy per square meter. The radiation emitted by this planet is equivalent to 100 million X-rays.
Jupiter generates a lot of heat inside and gives off this heat in the form of thermal radiation. It is known that it radiates twice as much energy as she absorbs from the sun.
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pproximately at what state does this start to matter? estimate this by finding n such that the volume term in the enthalpy is the same as the maximum possible energy above the ground state level. the pressure in the sun's corona gets up to 0.6 pascals; when does state enthalpy start to matter thera?
One of the several configurations in which matter can exist is a state of matter. In daily life, we can observe four different states of matter: solid, liquid, gas, and plasma.
There are numerous known intermediate states, including liquid crystal, while others, like Bose-Einstein condensates (in extremely cold temperatures), neutron-degenerate matter (in extremely high densities), and quark-gluon plasma, can only exist under very specific circumstances (at extremely high energy). Enthalpy is characterized as the quantity of internal energy and the result of the pressure and volume of a thermodynamic system. Enthalpy is a quality or state function that resembles energy and possesses energy dimensions (and is thus calculated in joules or erg units).The enthalpy H is equal to the product of the system's internal energy E and pressure P multiplied by volume V, or H = E + PV.
The density of the corona is ten million times lower than that of the Sun's surface. The corona is substantially less luminous than the Sun's surface as a result of its low density.To know more about matter
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use the work energy-bar chart and the equation to find the final speed of the skier in m/s. enter you value below with no units and two decimal places.
the total heights on the right (5 units) and the left (5 units) are equal (5 units) of the work-energy bar chart
How is speed determined by energy?As a result, the kinetic energy equation states that it is equal to 1/2 the object's mass times the magnitude of its velocity squared, or speed squared.
A work-energy bar chart is what is it?A vertical bar on a work-energy bar chart depicts the amount of energy that an object possesses. The amount of energy is expressed by the length of the bar; a longer bar indicates a higher amount of energy. Each type of energy has its own bar in a work-energy bar chart
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How much work does a bulldozer do in pushing another bulldozer with a force of 1500 n to a distance of 20 meters.
30000 J of work does a bulldozer do in pushing another bulldozer with a force of 1500 n to a distance of 20 meters.
W = F × s
W = work done
F = force, given = 1500 N
s = distance travelled, given = 20 m
Put these values in formula, W = Fs
W = 1500 × 20
W = 30000 J
Therefore, 30000 J of labor does a bulldozer do in pushing every other bulldozer.
The paintings achieved on an item is the amount of strength transferred to an item via paintings. Its formula is W = F × s. in which, W = paintings completed, F = force, s = distance travelled.
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A 2.0 m tall basketball player is standing a horizontal distance of 7.0 m away from a basketball hoop. The height of the hoop is 3.0 m above the floor. The basketball player throws the ball at an angle of 60 degrees above the horizontal, and from an initial height of 2.0 m above the floor. (Use g= 9.8 m/s2 and neglect air friction effects). Give your answer to 2 significant figures. a) How long does it take for the ball to reach the hoop? b) What is the initial velocity of the ball? c) At what angle to the horizontal is the ball traveling just before it enters the hoop? d) What is the maximum height reached by the ball?
A 2 m tall basketball player is standing at a horizontal distance 7 m away from a basketball hoop. The time taken by the ball to reach the hoop is 1.50 s. The initial velocity of the ball is 9.33 m/s.
The horizontal component of the initial speed is v cos 60° = 0.5 v
The vertical component of the initial speed is v sin 60° = 0.86 v
The player is 7 m away from the basketball hoop.
So, 7 = 0.5 v * t ----(1)
The net height with respect to the player is 3 m - 2 m = 1 m
So, 1 = - g* t²/2 + 0.86 v * t ----(2)
From (1), we have v * t = 14 ----(3)
Using (3) in (2), we have
1 = - 4.9* t² + 0.86 * 14
1 - 12.04 = -4.9 t²
-4.9 t² = -11.04
t² = 2.25
t = 1.50 s
It takes 1.5 s to reach the hoop.
Substituting t in (1), we have v * t = 14
v = 14/1.5 = 9.33 m/s
The initial velocity of the ball is 9.33 m/s.
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What is the law of supply and how are price and quantity related in the law?.
The law of supply is a microeconomic principle that asserts, with all other things being equal, that if the cost of an item or service rises, suppliers will offer more of those goods or services, and vice versa.
According to the rule of supply, suppliers will try to maximize their earnings when the price of an item rises by offering more products for sale. Market supply, short-term supply, long-term supply, joint supply, and composite supply are the five different types of supply. Individual supply curves and market supply curves are the two categories of supply curves, respectively.
Market supply curves depict the market supply timetable, whereas individual supply curves graph the individual supply schedule.
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while preparing your suas for flight, you notice that one of the propeller blades has a nick. what action should you take?
If the propeller blades has a nick first we will remove and replace the propeller.
A propeller is a device with a rotating hub and radial blades that are set to form a spiral helix that, as it rotates, exerts a linear thrust on a working fluid such as water or air.
Propellers are used to pump fluid through pipes or pipelines or to create thrust to propel a ship through water or an aircraft through air.If the propeller blades has a nick then firstly it will be removed and replaced with the other spare blade so as to continue the work and the damaged blade will be sent to the manufacturer for its repairment.
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Why is it generally easier to push a heavy object that is already moving instead of the same heavy object that is stationary.
Whether an object is stationary or not affects the gravitational pull on it differently.
This is inertia. More mass means that heavier items are more challenging to move and stop. Greater mass in heavier items makes them more resistant to change than lighter ones.
This is a result of the box's inertia and friction force. Static friction force initially opposes the applied force while the box is at rest. With more force being exerted, it grows. If the two surfaces are at rest, there will be more developed friction between them.
While frictional forces, such as the traction required to walk without slipping, may be advantageous, they can provide a significant amount of resistance to motion.
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Answer:
The force of friction on the object is different if it is stationary or not
Explanation:
why were astronomers in the 1990s surprised to learn that the expansion rate of the universe is getting faster with time?
The expected gravity to be slowing the expansion rate with time.
The universe's expansion was predicted to slow down for a reason, but what was it supposed to be?
Cosmologists—scientists who study the universe—predicted, up until recently, that gravity was slowing the universe's expansion rate. According to recent scientific findings, the universe might continue to grow indefinitely.
What was the question that the two astronomy teams' discoveries in the 1990s raised?
To determine the rate at which the universe was slowing down in its expansion, two rival teams started observing supernovas in the middle of the 1990s. They discovered the exact opposite, much to everyone's surprise: the expansion was speeding up rather than slowing down, driven by an enigmatic, invisible force.
Therefore, they expected gravity to be slowing the expansion rate with time.
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