Answer:
W = 819152 J = 819.15 KJ
Explanation:
The work done by Juri can be given by the following formula:
[tex]W = FdCos\theta[/tex]
where,
W = Work done = ?
F = Force = 200 N
d = distance = 5 km = 5000 m
θ = angle to horizontal = 35°
Therefore,
W = (200 N)(5000 m)Cos 35°
W = 819152 J = 819.15 KJ
A car is sitting still what could cause the car to move
PLS HELP! I’ll give Brainly!
What source of energy drives the water cycle?*
1 Earth's rotation
2 Earth's gravity
3 Circulation of ocean waves
4 The Sun
needs to go—energy, or heat.
please follow me mark me as brainlist
Answer:
4
Explanation:
water cycle is driven primarily by the energy from the sun
After performing a long equation using the conservation of mechanical energy you get a final answer that is negative. What does this mean?
A. Because energy is scalar it means that the energy is less than 0.
B. Because energy is scalar it means that the energy was transferred somewhere else.
C. Because energy is a vector it means that the energy was destroyed in the opposite direction.
D. Because energy is scalar it means that the energy was destroyed.
Answer:
The correct option is D.
Explanation:
The energy is the capacity to do work.
There are several types of energies.
1. kinetic energy : it is due to the motion of the body.
2. Potential energy : It is due to the position or the configuration of the body.
3. Mechanical energy: The sum of the kinetic energy and the potential energy is called mechanical energy.
The energy is a scalar quantity.
According to the law of conservation of energy, the energy can not be created and cannot be destroyed, it can transformed from one form to another.
When we get the mechanical energy negative, it means the energy was destroyed in some other forms of energy.
If the oil film becomes dark when the path length difference is less than one fourth the wavelength, what is the thickest the oil film can be and appear dark at all visible wavelengths
His question is incomplete, the complete question is;
A film oil on water will appear dark when it is very thin, because the path length difference becomes small compared with the wavelength of light and there is a phase shift at the top surface.
If the oil film becomes dark when the path length difference is less than one fourth the wavelength, what is the thickest the oil film can be and appear dark at all visible wavelengths. Oil has an index of fraction of 1.40.
In this question, assume the wavelength visible light is in the range of 400 nm to 700 nm.
Answer:
the minimum thickness of the oil for destructive interference to occur is approximately 35.714 nm
Explanation:
Given the data in the question;
Path difference for destructive interference between the two reflected waves ( top and bottom );
δ = 2nt ---------- let this be equation 1
Also, for one path difference of reflected waves, one fourth of the wavelength of reflected waves;
δ = λ/4 ---------- let this be equation 2
from equation 1 and 2;
δ = δ
2nt = λ/4
we find t;
8nt = λ
t = λ / 8n
given that; λ[tex]_{minimum[/tex] = 400 nm and n = 1.40
we substitute
t = 400nm / 8(1.40)
t = 400nm / 11.2
t = 35.7142857 ≈ 35.714 nm
Therefore, the minimum thickness of the oil for destructive interference to occur is approximately 35.714 nm
1. The temperature of the water in each of two beakers measures 50°C. One beaker contains 100 g of water, and the other beaker contains 250 g of water.
a. How does the amount of thermal energy in the two beakers compare? Explain your answer.
b. How does the average kinetic energy of the water molecules in the two beakers compare? How do you know?
1.Beaker A has less thermal energy than Beaker B
2.The water molecules in both beakers A and B have the same average kinetic energy
The temperature of the water in each of two beakers is same (50°C).
Beaker One contains ([tex]m_{1}[/tex]) 100 g of water
Beaker Two contains ([tex]m_{2}[/tex]) 250 g of water
Heat gained and lose by the object is depends on mass, change in temperature and specific heat.
Both beakers are made with same materials so their Specific heats and temperature are same .
Beaker B has more mass then Beaker A so Beaker A has less thermal energy than Beaker B.
2.The water molecules in both beakers A and B have the same average kinetic energy.
The temperature of an object is a measure of its internal energy. Thermal Energy is a form of Kinetic Energy because it is related to the Molecular Velocity.
When Temperature increases the velocity of the molecules ( increases or decreases) and the Kinetic Energy (increases or decreases) as Temperature decreases the velocity of the molecules ( increases or decreases) and the Kinetic Energy (increases or decreases).
so Kinetic Energy Depends on Velocity and Velocity depends on the Temperature in this problem Temperature are same so The water molecules in both beakers A and B have the same average kinetic energy.
what do you mean by Heat capacity of water?
It takes a lot of heat to increase the temperature of liquid water because some of the heat must be used to break hydrogen bonds between the molecules.
In other words, water has a high specific heat capacity, which is defined as the amount of heat needed to raise the temperature of one gram of a substance by one degree Celsius. The amount of heat needed to raise the temperature of 1 g water by 1 °C is has its own name, the calorie.
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Two disks are rotating about the same axis Disk A has a moment of inertia of 3.44 kg m2 and an angular velocity of 5.69 rad s Disk B is rotating with an angular velocity of 7.03 rad s The two disks are then linked together without the aid of any external torques so that they rotate as a single unit with an angular velocity of 4.23 rad s The axis of rotation for this unit is the same as that for the separate disks What is the moment of inertia of disk B
Answer:
The moment of inertia of disk B is 0.446 kilogram-square meters.
Explanation:
In this case, the moment of inertia of the disk B can be determined by means of the Principle of Conservation of Angular Momentum, whose model is:
[tex]I_{A}\cdot \omega_{A} + I_{B}\cdot \omega_{B} = (I_{A} + I_{B})\cdot \omega[/tex] (1)
Where:
[tex]I_{A}[/tex], [tex]I_{B}[/tex] - Moments of inertia of disks A and B, in kilogram-square meters.
[tex]\omega_{A}[/tex], [tex]\omega_{B}[/tex] - Initial angular velocities of disks A and B, in radians per second.
[tex]\omega[/tex] - Final angular velocity of the resulting system, in radians per second.
Let suppose that disk A rotates counterclockwise, whereas disk B rotates clockwise and that resulting system rotates counterclockwise. If we know that [tex]I_{A} = 3.44\,kg\cdot m^{2}[/tex], [tex]\omega_{A} = 5.69\,\frac{rad}{s}[/tex], [tex]\omega_{B} = -7.03\,\frac{rad}{s}[/tex] and [tex]\omega = 4.23\,\frac{rad}{s}[/tex], then the moment of inertia of the disk B is:
[tex]I_{A} \cdot (\omega_{A} - \omega) = I_{B}\cdot (\omega - \omega_{B})[/tex]
[tex]I_{B} = I_{A}\cdot \left(\frac{\omega_{A}-\omega}{\omega - \omega_{B}} \right)[/tex]
[tex]I_{B} = (3.44\,kg\cdot m^{2})\cdot \left(\frac{5.69\,\frac{rad}{s} - 4.23\,\frac{rad}{s} }{4.23\,\frac{rad}{s} + 7.03\,\frac{rad}{s} } \right)[/tex]
[tex]I_{B} = 0.446\,kg\cdot m^{2}[/tex]
The moment of inertia of disk B is 0.446 kilogram-square meters.
What is/are the products in the chemical equation?
Answer:NH3
Explanation: product s are the result of the equation
[tex]\huge{ \mathfrak{ \underline{ Answer }}}࿐[/tex]
The balanced Chemical equation for above reaction is :
[tex] \mathrm{N_2 + 3H_2 \rightarrow 2NH_3}[/tex]
The product formed here is [tex]NH_3[/tex] (Ammonia)
[tex] \\ \\ \\ \\ \\ \\ [/tex]
[tex] \#TeeNForeveR[/tex]
In a concave mirror, if the object is located beyond the center of curvature the image formed is real, inverted, and smaller than the object. but, if the object is located between the center of curvature and the focal point, the image is real, inverted, and ____ Than the object
A) Also smaller
B) Lager
C) The same size
D) Disappears
Joe follows the procedure below to make a compass.1. Move a magnet from the top of a needle to its point fifty times.2. Lay the needle on a cork that is floating in a bowl of water.3. Observe the direction that the needle points.What is the purpose of step 1
Answer:
The purpose of step 1 is to induce magnetism into the needle, so that it retains magnetism and behaves as a magnet after the process.
Explanation:
The method of production the needle magnet in the procedure is the single stroke. This process involves a continuous stroking of a magnetic object (e.g needle) repeatedly for a period or number of times with a permanent magnet. Thus, when the permanent magnet is removed, the object retains magnetism, and behaves like a magnet.
The importance of the stroking process is the turn a magnetic object to a magnet by inducing magnetism into it.
Friction _____.
1.happens whenever work is done
2.occurs when objects rub against each other
3.releases energy as heat
4.all of the above
Answer:
all above
Explanation:
friction is necessary to live
Answer:
All of above
Explanation:
Elements : Atoms :: Covalent compounds:____
Answer:
Hcl
Explanation:
Hydrogen and chlorine charge electrons and are non metals while compounds with metals are ionic
5- A 2.0 kg block of aluminum (specific heat = 897 J/kg·K) is at an initial temperature of 300 K. What will its final temperature be if (3.35 × 105 J )of thermal energy is transferred to the block?
Answer:
T = 486.6 K
Explanation:
The final temperature of the block can be found using the following formula:
[tex]Q = mC\Delta T\\[/tex]
where,
Q = Thermal Energy Transferred = 3.35 x 10⁵ J
m = mass of aluminum block = 2 kg
C = Specific Heat = 897 J/kg.K
ΔT = Change in Temperature = T - 300 K
T = Final Temperature of the Block = ?
Therefore,
[tex]3.35\ x\ 10^5\ J = (2\ kg)(897\ J/kg.K)(T-300\ K)\\\\5.38\ x\ 10^5\ J + 3.35\ x\ 10^5\ J = (1794 J/K)(T)\\\\T = \frac{8.73\ x\ 10^5\ J}{1794\ J/K}[/tex]
T = 486.6 K
What is the resultant?
1400 N
643 N
Look at the following chemical equation.
4Al + 3O2 → 2Al2O3
What is true about this chemical equation?
A
It is balanced because the mass of the reactants is equal to the mass of the products.
B
It is balanced because the number of reactants is equal to the number of products.
C
It is unbalanced because the mass of the reactants is greater than the mass of the products.
D
It is unbalanced because the number of reactants is greater than the number of products.
Answer:
it would be c
Explanation:
its the only one that makes sence
newton's second law states that when a net force acts on an object, it accelerates it.Explain how it would be possible for two or more forces to act on object without accelerating it
Answer:
See Explanation
Explanation:
According to Newton's second law of motion, the acceleration of a body is proportional to the net external force that acts on the body.
A body accelerated when it is acted upon by an unbalanced net external force.
When the external forces acting on a body are balanced, the effect of each force is cancelled by the other hence the body is not accelerated according to Newton's second law.
(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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When placed at a certain point, a
0.110 C charge feels an electric
force of 19.8 N. What is the
magnitude of the electric field at
that point?
Answer: 180
Explanation: Acellus
This equation gives the magnitude of the electric field generated by a point charge Q. The distance r in the denominator is the separation between the point of interest and the point charge Q. Or the center of a spherical charge.
What magnitude of the electric field at that point?It is simple to determine the size of the electric field by calculating the force per charge on the test charge. From this definition, the common metric units for electric field strength are derived. Electric field units would be force units divided by charge units, as the definition of an electric field is a force per charge.
F = |qvBsin()| calculates the magnetic force's magnitude. The following factors are involved in determining the force's direction. A plane is first defined by the magnetic field vector, B, and the velocity vector, v. In or out of this plane, the magnetic force is perpendicular to it.
Therefore, The electric force F, or Coulomb force, exerted per unit positive electric charge q at that place can be used to determine an electric field's strength, or E = F/q.
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Bronco the skydiver, whose mass is 100 kg experiences 200 N of air resistance. What is the acceleration of his fall? Show Work, Please help this is due at 11:59
Answer:
Acceleration = 2 m/s²
Explanation:
Given the following data;
Mass = 100 kg
Force = 200 N
To find the acceleration of Bronco's fall;
Mathematically, force is given by the formula;
Force = mass * acceleration
Substituting into the formula, we have;
200 = 100 * acceleration
Acceleration = 200/100
Acceleration = 2 m/s²
Therefore, the acceleration of his fall is 2 meters per seconds square.
A 0.5-kg ball moving at 5 m/s strikes a wall and rebounds in the opposite direction with a speed of 2 m/s. If the impulse occurs for a time duration of 0.01 s, find the magnitude of the net force on the ball.
Answer: 350 N
Explanation:
Given
Mass of ball is [tex]0.5\ kg[/tex]
Speed of ball after rebound is [tex]v=2\ m/s[/tex]
Time period for impulse [tex]t=0.01\ s[/tex]
Impulse imparted in equal to the change in the momentum of object
[tex]\Rightarrow J=m(v-u)\quad [\text{u=speed of ball before collision}]\\\Rightarrow J=0.5\times \left(2-(-5)\right)\\\Rightarrow J=0.5\times 7\\\Rightarrow J=3.5\ N.s[/tex]
Impulse is the product of average force and duration of application
[tex]\Rightarrow J=F_{avg}\cdot \Delta t\\\Rightarrow 3.5=F_{avg}\times 0.01\\\\\Rightarrow F_{avg}=350\ N[/tex]
Select all the correct answers.
A worker is holding a filled gas cylinder still. Which two sentences are true about the energy of the filled gas cylinder?
It has no energy because it's being held still
it has gravitational potential energy because of its height
its atoms and molecules have thermal energy
it has motion energy because it will fall if let go
its kinetic energy is being converted to potent energy
Answer:
b and c
Explanation:
its correct
Choose the correct option
Car P has twice the speed of car Q but car Q has four times the mass of car P. Which statement is correct?
A Car P has half the kinetic energy of car Q.
B Car P has one quarter of the kinetic energy of car Q.
C Car P has twice the kinetic energy of car Q.
D The two cars have the same kinetic energy.
Answer:
the answer will be c
car p has twice the kinetic energy of car Q
Tall buildings have lightning rods to protect them from lightning strikes. Explain wy the rods rare pointed in shape and taller than the buildings.
Answer:
the rods are pointed so it can absurb the energy from the lighting and taller than the building so it hits the rod first instead of the building
Explanation:
hope this helps
∞∞∞∞∞∞∞∞∞∞
According to the cell theory where do cells come from?
Answer:
Cells come from other pre-existing cells
Explanation:
Answer:
Cell discovery and cell theory
Matthias Schleiden and Theodor Schwann conclude that all living organisms are made of cells, and that cells can be produced from other cells. Rudolf Virchow confirms that all cells must come from pre-existing cells.
Explanation:
i looked it up
¿Cuál es la intensidad del campo eléctrico a una distancia de 2 m de una carga de -12μC? *
Answer:
Una secadora de cabello tiene una resistencia de 10Ω al circular una corriente de 6 Amperes, si está conectado a una diferencia de potencial de 120 V, durante 18 minutos ¿Qué cantidUna secadora de cabello tiene una resistencia de 10Ω al circular una corriente de 6 Amperes, si está conectado a una diferencia de potencial de 120 V, durante 18 minutos ¿Qué cantidad de calor produce?, expresado en caloríasad de calor produce?, expresado en calorías
Suppose the mass of a fully loaded module in which astronauts take off from the Moon is 2000 kg. The thrust of its engines is 8600 N. Calculate its acceleration in a vertical takeoff from the Moon.
Answer:
The acceleration during the take-off from the moon is 4.3 m/s²
Explanation:
Given;
the mass of the fully-loaded module, m = 2000 kg
The thrust of its engines, F = 8600 N
Apply Newton's second law of motion to determine the acceleration during the take-off from the moon;
F = ma
where;
a is the acceleration
a = F / m
a = 8600/2000
a = 4.3 m/s²
Therefore, the acceleration during the take-off from the moon is 4.3 m/s²
Which of the following is a disadvantage of a parallel circuit? A. Parallel circuits are a complex circuit and use more wire. B. If one bulb goes out the others go out too. C. Each of the bulbs burn at a different level of brightness.
If humans cannot see ultraviolet waves, how can ultravoilet light be used to gather evidence of a crime?
Answer: The question is incomplete because the options are not given here are the options gotten from Another website.
A. Ultraviolet light detects the presence of radioactive substances.
B.Ultraviolet light shows cold areas as blue and warm areas as red.
C.Ultraviolet light causes substances to fluoresce and give off visible light.
D. Ultraviolet light transmits information to AM and FM radio receivers.
The correct option is C.
Ultraviolet light causes substances to fluoresce and give off visible light
Explanation:
This is because UV light radiates at a very short wavelengths compared to visible light which is impossible for humans to see it. Therefore , when UV light is absorbed by some particular materials, it reflect back towards the eye as visible radiation with a longer wavelength .This process is called UV-induced visible fluorescence.
1. Explain what the frequency of a transverse wave is.
2. What happens to the wave when you set the amplitude to 0 mm?
3. What happens when you move the amplitude to 40 mm?
4. Explain what the amplitude of a transverse wave is.
Explanation:
I am not understanding your question
Since a light year is a unit of astronomical distance equal to the distance light travels in one year, which phrase best completes the sentence? The distance from the sun to Earth would be ___________.
Question 3 options:
exactly one light year
less than one light year
any number of light years
more than one light year
Answer:
less than one light year
Explanation:
earth is 0.00001581 light years away from the sun :)
How can you describe the path of the projectile motion?
Projectile motion is a motion where an object moves in a bilaterally symmetrical path
What is a Projectile motion ?Projectile motion is a form of motion experienced by an object or particle that is projected near Earth's surface and moves along a curved path under the action of gravity only.
If an object is thrown up by making a certain angle with respect to ground ( let say theta) up in the sky , it will reach a maximum height after which it follows a symmetrical path as it comes down due to the action of gravity . The path followed from the beginning till end will be a parabolic in this case .
It is a motion where an object moves in a bilaterally symmetrical path .
Projectile motion only occurs when there is only one force applied at the beginning of the trajectory, after been released object comes in the action of gravity .
General form of equation of trajectory of Projectile motion can be written as :
y = x tan(theta ) - g(x^2)/(2(u^2)cos^2(theta))
where y = horizontal component
x = vertical component
g = gravity
u = initial velocity
theta = angle of inclination of the initial velocity from horizontal axis
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