The power developed is 8000 W.
Given data:
Force = 250 N
Distance traveled = 6 m
Velocity = 32 m/s
Let's find out the work done on the object by the applied force.
Work done is given by the product of force and distance covered:
W = F × s
W = 250 × 6 = 1500 J
Thus, the work done on the object by the applied force is 1500 J.
Next, let's determine the power developed.
Power is defined as the rate at which work is done, i.e.,
P = W / t
where P is power, W is work done, and t is time taken to do that work.
We know that velocity = distance / time. Rearranging the above expression, we get:
t = d / v
Substituting the given values, we get:
t = 6 / 32
P = W / t
Substituting the calculated value of W and t, we get:
P = 1500 / (6 / 32)
P = 8000 W
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why is sport important
Answer:
because it helps you as a human being get healthy and
fit
A cell supplies current of 0.6A and 0.2A through 1ohms and 4.0ohms resistor respectively. Calculate the internal resistance of the cell
0.5Ω
Explanation:Since different currents are passing through the resistors, then the resistors are most probably connected in parallel. This also means that the same voltage will pass across them.
Using Ohm's law, the voltage across a resistor in a circuit is given by;
V = I(R + r) -----------(i)
For the 1ohm resistor, the voltage across it is given by;
Where;
I = current passing through the 1 ohm resistor = 0.6A
R = resistance of the 1 ohm resistor = 1Ω
r = internal resistance of the cell = r
Substitute these values into equation (i) as follows;
V = 0.6(1 + r) -------------------(ii)
For the 4.0ohm resistor, the voltage across it is given by;
Where;
I = current passing through the 4.0 ohms resistor = 0.2A
R = resistance of the 4.0 ohms resistor = 4.0Ω
r = internal resistance of the cell = r
Substitute these values into equation (i) as follows;
V = 0.2(4.0 + r) -------------------(iii)
Now solve equations (ii) and (iii) simultaneously;
V = 0.6(1 + r)
V = 0.2(4.0 + r)
Substitute the value of V in equation (ii) into equation (iii). Therefore, we have;
0.6(1 + r) = 0.2(4.0 + r)
Solve for r
0.6 + 0.6r = 0.8 + 0.2r
0.6r - 0.2r = 0.8 - 0.6
0.4r = 0.2
r = \(\frac{0.2}{0.4}\)
r = 0.5
Therefore, the internal resistance of the cell is 0.5Ω
The hot water that falls into the coffee cup from a coffee vending machine is in rectilinear motion.
Yes, the hot water falling into the coffee cup from a coffee vending machine is in rectilinear motion. Rectilinear motion refers to the motion of an object in a straight line, which is the path taken by the water as it travels from the machine into the cup.
When hot water falls into a coffee cup from a vending machine, it typically follows a straight line path from the machine to the cup. This type of motion is known as rectilinear motion, which simply means that the object (in this case, the hot water) moves in a straight line. The reason why the hot water follows a straight line path is due to the force of gravity. Gravity is constantly pulling the water downward, and since there are no other forces acting upon it, the water moves in a straight line.
It's important to note that while the hot water is in rectilinear motion as it falls into the cup, it may not necessarily remain in rectilinear motion once it enters the cup. This is because the water will interact with the coffee and cup, potentially causing it to change direction or slow down. However, for the brief moment that the water is falling from the vending machine into the cup, it is indeed in rectilinear motion.
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A 15kg child and a 25kg child sit at opposite end of a 4m seesaw pivoted at its center. Where should the third child whose mass is 20kg sit in order to balance the seesaw?
The position the 20 kg child should seat in order to balance the seeesaw is determined as 1 m.
What is the position of the 20 kg child?Let the position of the 20 kg child from the center of the seesaw = x
Apply the principle of moment, taking moment about the pivot as shown below;
clock wise moment = antilock wise moment
15(2m) + (20x) = 25 (2m)
30 + 20x = 50
20x = 50 - 30
20x = 20
x = 20/20
x = 1 m
Thus, when the 20 kg child seats at 1 m from the end of the 15 kg child the seesaw will balance.
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Help would be greatly appreciated
To find the x-component of the vector, we need to use trigonometry. We know that the vector has a magnitude of 55.1 m and makes an angle of -13.9° with the +x axis.
Since the angle is measured from the +x axis, we need to add 180° to get the angle measured from the origin.
So, the angle measured from the origin is:
180° - 13.9° = 166.1°
Now we can use trigonometry to find the x-component:
cos(166.1°) = -cos(13.9°) ≈ -0.978
x-component = magnitude × cos(166.1°)
x-component = 55.1 m × (-0.978)
x-component ≈ -53.9 m
Therefore, the x-component of the vector is approximately -53.9 m.
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The x-component of the vector is -53.9m.
We must utilize trigonometry to determine the vector's x-component. We are aware that the vector has a magnitude of 55.1 m and intersects the +x axis at an angle of -13.9°.
To acquire the angle measured from the origin because the angle is measured from the +x axis, we must add 180°.
As a result, the angle from the origin is:
180° - 13.9° = 166.1°
Trigonometry can now be used to determine the x-component:
cos(166.1°) is equal to cos(13.9°) -0.978.
magnitude = cos(166.1°) x-component
X component: 55.1 meters (-0.978) = -53.9 m for the x-component
As a result, the vector's x-component is roughly -53.9 m.
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What happens to a circuit's resistance (R), voltage (V), and current (1) when
you change the thickness of the wire in the circuit?
A. V and I will also change, but R will remain constant.
B. R and I will also change, but V will remain constant.
O C. R, V, and I will all remain constant.
OD. R and V will also change, but I will remain constant.
When you change the thickness of the wire in a circuit, option B. the resistance (R) and current (I) will also change, but the voltage (V) will remain constant.
The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area (thickness). As the thickness of the wire changes, the cross-sectional area changes, which in turn affects the resistance. Thicker wires have a larger cross-sectional area, resulting in lower resistance, while thinner wires have a smaller cross-sectional area, resulting in higher resistance. Therefore, changing the thickness of the wire will cause a change in resistance.
According to Ohm's Law (V = IR), the voltage (V) in a circuit is equal to the product of the current (I) and the resistance (R). If the voltage is kept constant, and the resistance changes due to the thickness of the wire, the current will also change to maintain the relationship defined by Ohm's Law. When the resistance increases, the current decreases, and vice versa.
However, it's important to note that changing the thickness of the wire will not directly affect the voltage. The voltage in a circuit is determined by the power source or the potential difference applied across the circuit and is independent of the wire thickness. As long as the voltage source remains constant, the voltage across the circuit will remain constant regardless of the wire thickness. Therefore, the correct answer is option B.
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Which symbol represents a type of radiation that has the same mass as an
electron and a positive charge?
Answer:β^+
Explanation: it is beta + , also positron emission radiation
Answer:
0 +1 e or β+
Explanation:
A P E X
3. The average American male consumes 2,000 to 3,000 calories and
females consume 1,600 to 2,400 calories. *
True or False
Answer:
True
Explanation:
Took the quiz already
Answer:
This is true.
Explanation:
The average male consumes 2000-3000 calories per day whereas the average female consumes 1600-2400.
С
A
B
D
Which point is the centre of mass of this uniform hexagon of thin card?
Answer:The weight of an object may be thought of as acting at a single point called its centre of mass
Explanation:
A boulder falls due to gravity. The reaction to the force on the boulder is:
a. air resistance
b. the boulder pulling up on earth
c. the boulder being pulled downward by earth
d. actually, all of these
The reaction to the force on the boulder is the boulder being pulled downward by the earth (c).
This is due to the force of gravity acting on the boulder and causing it to accelerate towards the ground. While air resistance may slow down the boulder's descent, it is not the reaction to the force on the boulder. The boulder pulling up on earth and all of these options are not the correct answer.
According to Newton's third law of motion, for every action, there is an equal and opposite reaction. Therefore, the reaction to the force of gravity on the boulder is the boulder pulling up on Earth with an equal and opposite force.
Option (b) "the boulder pulling up on earth" is the correct answer.
Option (a) "air resistance" is not relevant in this scenario since it is a force that opposes motion through air and it would not be significant for a falling boulder due to gravity.
Option (c) "the boulder being pulled downward by earth" is incorrect because it is the action (force of gravity on the boulder) rather than the reaction to the force.
Option (d) "actually, all of these" is also incorrect as air resistance is not a significant force for a falling boulder, and the reaction to the force of gravity on the boulder is the boulder pulling up on Earth with an equal and opposite force.
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venus and earth probably formed with similar amounts of carbon dioxide in their secondary atmospheres. which of the following is true?
The initial amounts of carbon dioxide in the secondary atmospheres of Venus and Earth were likely similar, the subsequent evolutionary paths of their atmospheres resulted in distinct differences between the two planets.
Based on the statement that Venus and Earth probably formed with similar amounts of carbon dioxide in their secondary atmospheres, the following statement is true: The initial atmospheric composition of Venus likely included a significant amount of carbon dioxide, similar to that of Earth. During the early stages of planetary formation, both Venus and Earth experienced processes such as outgassing from volcanic activity, impact events, and interactions with their surrounding environments. These processes contributed to the formation of their secondary atmospheres. It is believed that carbon dioxide played a significant role in shaping the early atmospheres of both planets. However, it is important to note that over time, the evolution of Venus' atmosphere diverged significantly from that of Earth. Venus underwent a runaway greenhouse effect, causing a dramatic increase in its atmospheric carbon dioxide levels and leading to the planet's current extremely dense and hot atmosphere. In contrast, Earth's atmosphere reached a stable equilibrium, maintaining a much lower concentration of carbon dioxide.
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Two waves, initially in phase, travel through space. The first wave travels 8 meters. The second wave travels 10 meters. When they meet, total destructive interference occurs. Which of these is a possible wavelength for the two waves?.
Destructive interference occurs when the maxima of two waves are 180 degrees apart: a positive displacement of one wave is precisely cancelled by a negative displacement of the other wave. A zero amplitude wave is the result.
What is interference?Interference is defined as the presence of waves from two separate sources that have different wavefronts. Diffraction, on the other hand, is described as secondary waves that split off from the primary wave. Two waves are superimposed during interference to produce an amplitude-variable wave. Interference is the process of superimposing two waves to produce a subsequent wave with a different velocity. Two waves are superimposed in the interference process to produce a new wave with a different wavelength.
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The kind of heat transfer that travels through space in electromagnetic waves is?
Answer:
radiation!
Explanation:
Answer: Radiation is the thermal transmission of heat energy across space.
Explanation:
What do the three variables (f,m, a) in the equation mean?
Answer:
f=force m=mass and a=acceleration
Please help solve data table for Conservation of Energy Lab!! Calculate percent difference of GPE and KE.
Answer: First, work out the difference (decrease) between the two numbers you are comparing. Next, divide the decrease by the original number and multiply the answer by 100. If the answer is a negative number, this is a percentage increase.
this is filled just send it to your teacher but change name and date
X-rays of wavelength 9. 74×10?2 nm are directed at an unknown crystal. The second diffraction maximum is recorded when the X-rays are directed at an angle of 21. 9 ? relative to the crystal surface.
What is the spacing between crystal planes? In m
The spacing between crystal planes is 2.78 × 10⁻¹⁰ m. The Bragg's Law can be used to find the spacing between the crystal planes.
Bragg's Law states that when X-rays of wavelength λ fall on the crystal, the maxima of diffraction will be observed when the path difference between the two rays is an integral multiple of the wavelength (2d sinθ = nλ, where n=1, 2, 3.....).Where d is the spacing between the crystal planes θ is the angle between the incident X-rays and the crystal planes
The maximum diffraction was recorded at 21.9°, thus,
θ = 21.9°λ
= 9.74×10⁻² nm
= 9.74×10⁻¹¹ m
From Bragg's law: 2d sinθ
= nλ2d
= nλ/sinθ
Substitute the values in the equation, we have:
2d = (1)(9.74 × 10⁻¹¹)/sin(21.9°)d
= (9.74 × 10⁻¹¹)/(2 × sin(21.9°))d
= 2.78 × 10⁻¹⁰ m
This is the spacing between the crystal planes.
The spacing between crystal planes is 2.78 × 10⁻¹⁰ m.
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Joanna claims that a large block of ice will cool a substance more than a small block of ice will at the same temperature. To support her claim, Joanna places two blocks of ice, one larger than the other, into separate beakers each containing some water. She compares the final water temperatures of the two beakers after each block of ice has melted.
She puts each block of ice in the same 3000 mL beaker, each with 2000 mL of water at room temperature, and measures the temperature before and after adding ice. Therefore, small blocks of ice will have the same temperature.
Joanna puts two blocks of ice (one larger than the other) into separate cups and fills each with water. She compares the final water temperature of the two cups after each block of ice melts.
Put each block of ice in the same 3000 mL beaker, each at room temperature, put 2000 mL of water in it, and measure the temperature before and after adding ice. This way you keep the water at the same temperature in the beginning, then the temperature changes after you add the ice, giving you a better idea of the final temperature reading.
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Since the particles of liquids are able to slide past each other into different locations they have ______.
a. no definite volume
b. definite volume
c. definite shape
d. no definite shape
A dog is chasing a squirrel. He runs 5 meters to the left and then 3 meters to the right. What is the distance?
the answer will be 8 meters
what is the starting current When running at its operating speed, a 220-V dc motor with an armature whose resistance is 1.70 Ω draws a current of 16.0 A. What is the back emf of the motor when it is operating normally?
The back emf of the motor when it is operating normally is 193.2 V.
back emf = voltage - (current * armature resistance)
back emf = 220 V - (16.0 A * 1.70 Ω)
back emf = 193.2 V
EMF stands for electromotive force, which is a term used in physics to describe the voltage or potential difference created by a source of electrical energy. The term "force" is somewhat misleading, as it does not refer to a physical force, but rather to the energy per unit charge that can be supplied by a source.
EMF can be generated by a variety of sources, including batteries, generators, and solar cells. In each case, the EMF is created by a process that separates positive and negative charges, creating a potential difference between two points in a circuit.
EMF is measured in units of volts (V), which represent the energy required to move one coulomb of charge between two points in a circuit.
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Which statement describes a chemical property related to the particles that make up a material
Answer:
Salt crystals are hard and brittle because they are made up of atoms that combine by ionic bonding.
Explanation:
What is a key phrase for remembering the order of the planets?
i don’t know what to put here but i just wanna leave
a car of mass 1000kg accelarates from rest to a speed of 10m/s. what's its power?
Answer: the power of the car is 50000 watt
Explanation: the mass of the car = 1000 kg
speed of the car = 10 m/s
then, power = 1/2 mass *( velocity)^2
power = 1/2* 1000 kg* (10 m/sec)^2
= 50000 joule/sec ...........(joule= kg* m^2 /sec^2)
Ms. Lachance has to pick up her daughter from the airport and is running late. As she pulls her car out of the driveway and starts to drive down the road, she takes off as fast as her car will go. When she does this her coffee cup, which she left on the hood by accident flies into the windshield making it hard for her to see. Using Newton’s first law, explain why the coffee spilt all over the windshield.
Answer:
the gravity was pulling the cup to the front of the window even though the wind was pushing it the other way.
Explanation: the gravity must be strong
By using the Newton's first law of Motion, it can be explained why the coffee spilt all over the windshield. This is because there is gravitational force which acts upon it and it pushes the substances in the downward direction towards the Earth.
What is Newton's first law of motion?
Newton's first law of Motion states that a body remains in the same state of rest or uniform motion in a straight line unless and until an external force is applied on it. This means that a body will not start moving by itself until and unless an external force acts on it.
In this case, lachance's daughter is trying to pick her coffee cup, the coffee cup at the windshield is spilt which makes it difficult for her to see. This is because, there is the gravitational force or gravity which is pulling the coffee cup to the front of the window even though the wind was pushing it in the other way.
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2. The frequency of a sound is 1621 Hz. If the temperature is 30.0 °C, what is the wavelength
of the sound wave?
7. A submarine is 30m below sea water of density 1g/cm³. if the atmospheric pressure at the place is equivalent to 760mmHg. Find the total pressure acting on the submarine (Take density of mercury =13600kg/m³)
The total pressure acting on the submarine is equal to 2967.19 mmHg.
To find pressure at a depth of 30 m under the sea surface by using the formula:
P = ρgh
P = pressure,
ρ = density of the liquid
g = acceleration due to gravity
h = depth
According to question
density of seawater = 1g/cm³, which is equivalent to 1000 kg/m³
1g/cm³ = 1000 kg/m³, and
h is equal to 30 m,
We can find the pressure on the submarine by using:
Pressure = ρgh
Pressure = 1000 kg/m³ × 9.81 m/s² × 30 m
Pressure = 294300 Pa
To calculate the total pressure to act upon the submarine, add the atmospheric pressure to the pressure due to the seawater.
According to question atmospheric pressure is 760mmHg, which is equal to 101325 Pa (1mmHg = 133.322 Pa), the total pressure on the submarine can be obtained as:
Total pressure is equal to atmospheric pressure + pressure due to seawater
P = 101325 Pa + 294300 Pa
P = 395625 Pa
To change this pressure into units of mmHg, use the information that 1 Pa = 0.0075 mmHg
Total P in mmHg = 395625 Pa × 0.0075 mmHg/Pa
So, total pressure in mmHg is 2967.19 mmHg.
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Two 0.55-kg basketballs, each with a radius of 14 cm , are just touching. How much energy is required to change the separation between the centers of the basketballs to 1.1 m? (Ignore any other gravitational interactions.)
Answer:
The amount of energy required is 4.08 J.
Explanation:
Given,m1 = m2 = 0.55-kgR = 14 cm = 0.14 m The distance between the two basketballs d = 1.1 m
Energy required to change the separation between the centers of the basketballs to 1.1 m is given by the formula; E = K1 + K2 - U where K1 = kinetic energy of ball 1K2 = kinetic energy of ball 2U = potential energy
Let's calculate K1,K2, and U: K1 = 0.5 mv²where m = mass of ball v = velocity of ball Initial velocity of ball = 0 m/s Final velocity of ball v = 0.5 m/sK1 = 0.5 × 0.55 × (0.5)²= 0.069 JK2 = 0.5 mv² Initial velocity of ball = 0 m/s .
Final velocity of ball v = - 0.5 m/sK2 = 0.5 × 0.55 × (- 0.5)²= 0.069 J Let's find out the potential energy; U = (kQ1Q2) / d
where Q1 = Q2 = Q d = distance between the centers of two balls U = (kQ²) / d where k = Coulomb's constant = 8.99 × 10⁹ Nm²/C²Q = charge on a ball = 0 (because it is an uncharged object) U = 0.
Therefore, E = K1 + K2 - U= 0.069 + 0.069 - 0= 0.138 J Therefore, the amount of energy required is 4.08 J.
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25 points please help
In the chemical reaction CH4 + 2O2 → CO2 + 2H2O, there are reactants on the left of the equation and products on the right. If you count the atoms in the reactants, there are
a. 4 carbon atoms, 4 hydrogen atoms, and 2 oxygen atoms
b. 1 carbon atom, 4 hydrogen atoms, and 2 oxygen atoms
c. 1 carbon atom, 4 hydrogen atoms, and 4 oxygen atoms
d. 4 carbon atoms, 4 hydrogen atoms, and 4 oxygen atoms
Answer:
the answer is A. 4 carbon atoms, 4 hydrogen atoms, and 2 oxygen atoms
The number of atoms of each molecule of the reactants is required.
The correct option is c. 1 carbon atom, 4 hydrogen atoms, and 4 oxygen atoms
The given reaction is
\(CH_4+2O_2\rightarrow CO_2+2H_2O\)
For carbon atoms
The only carbon atom is present in \(CH_4\)
So, 1 carbon atom
The hydrogen atoms are also present is \(CH_4\)
There are 4 hydrogen atoms.
The oxygen atoms present is \(2\times 2=4\)
So, the number of atoms present in the reactants are c. 1 carbon atom, 4 hydrogen atoms, and 4 oxygen atoms
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(b) A lift (elevator) in a high building transports 12 passengers, each of mass 65 kg, through a
vertical height of 150 m in a time of 64 s.
(0) Calculate the power needed to transport the passengers through this height.
power =
Explanation:
P =F * v
F = m * a = 65 kg * 9.81 ms^-2 * 12 passengers
v = d/t = 150m / 64 s
I think you can calculate and substitute this units should be watts
The power needed to transport the passengers through this height is 17.933 KW or 17933 Watts.
What is Power?Power can be defined as the rate at which work is done by an object. Power can be calculated by the formula:
P = W × t
where, P = power, w = work done, and t = time taken.
The SI unit for power is the watt (W), where 1 watt power is equal to 1 joule/second (1W = 1J/s). Because, the work done by an object is the energy transfer by the object, and power is also the rate at which energy is expended.
P = F × v
where, P = Power, F = Force, and V = velocity of the object
F = m × a = 65 kg × 9.81 ms⁻² × 12 passengers = 7651.8
v = d/t = 150m / 64 s = 2.343
P = 7651.8 × 2.343
P = 17,933.90
P = 17.933 KW
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