Answers
Retrograde motion, which confused astronomers and mathematicians for centuries, is actually caused by a planet that is on the same side of the Sun as the Earth, the planet catches up with, and passes the Earth ( planets revolving counterclockwise around the Sun).
What is retrograde motion?This refers to the movement of a planet in a direction opposite to that of other bodies within its system, as can be seen from a particular viewing point.
When viewed from a position in space north of the solar system all the major planets revolve counterclockwise around the Sun. But Venus and Uranus rotate counterclockwise on their own axes; these two, therefore, have retrograde rotation.
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Related Questions
Predict the velocity vy when y=-3.5 meters. Use the average acceleration you calculated in Activity 1. Use the formula v = Vo2 + 2ay, where v = final velocity, Vo = initial velocity, a = average acceleration, and y = y displacement. (Note that v is the final velocity in the y direction: Vy.)
Answers
Answer:
8.1
Explanation:
You push a 1.5 kg ball across a desk for 2 seconds, so that 10 J of work have been done. How much power was produced?
Answer
Answers
Answer:
i need help with the same question
Explanation:
Question 4 You are required to explain the terms lines of flow and stream lines when applied to fluid flow and deduced the relationship between them in laminar flow.
Answers
In fluid dynamics, the terms "lines of flow" and "streamlines" are used to describe the path followed by individual fluid particles as they move within a flow. While both terms are closely related, they have slightly different meanings.
Lines of flow refer to the imaginary lines that are drawn in a fluid flow field to represent the direction in which the fluid particles move. These lines can be fluid dynamics,as the path that a fluid particle would trace out over time. Lines of flow can provide information about the overall flow pattern and direction in a fluid system.
On the other hand, streamlines are the actual curves or lines that are tangent to the velocity vector at every point in the flow field.
These streamlines are defined as the locus of points through which a fluid particle passes at a given instant. Streamlines are a mathematical representation of the flow pattern and can be determined through computational fluid dynamics (CFD) or experimental methods.
In laminar flow, where the fluid flows smoothly in layers with minimal turbulence, the lines of flow and streamlines coincide with each other. This means that the lines of flow and streamlines are identical, and fluid particles move along these lines without crossing each other.
The streamlines do not intersect or cross paths in laminar flow, indicating that the flow is well-ordered and predictable.
In summary, lines of flow and streamlines both describe the path followed by fluid particles in a flow field, with the key difference being that lines of flow are conceptually drawn paths, while streamlines are the actual curves tangent to the velocity vector at each point. In laminar flow, the lines of flow and streamlines coincide, reflecting the organized and smooth nature of the flow.
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19. In a turtle race, a 20 kg turtle moves with a velocity of 0.1 m/s. What is the kinetic energy of the turtle?
A. 20 J
B. 0.2 J
C. 0.1 J
Answers
C
Explanation:
KE=1/2mv^2
KE=1/2(20)(0.1)^2
0.1^2= 0.01
KE= 1/2(20)(0.01)
KE= 0.1 J
Will ice melt faster in salt, sugar or water?
Answers
Answer:
Water because the salt will just make it colder and the sugar won't do anything
Mixed powders may be categorized as
Answers
Answer:
on flow properties and free-flowing and cohesive.
Explanation:
the power Free flowing powders do not cling together, as cohesive powders stick to each other and form that do not disperse well during mixing
The image shows a molecular model of a compound using balls and sticks. Each ball is an atom. If you were to use balls and sticks to model a molecule of an element how must your model differ from what’s shown
Answers
Element molecules consist of a single type of atom and are held together by covalent bonds. The model would have uniform-colored balls connected by sticks representing these bonds.
The image represents a molecular model of a compound. Balls represent atoms, while sticks show chemical bonds between atoms. If you are to use balls and sticks to model a molecule of an element, the model would differ from what is shown because the element is made up of one type of atom. In other words, it is a pure substance that can't bond to other atoms of the same kind. Molecules of elements are usually composed of a single element and are not formed by bonding between two or more different atoms.In contrast to compounds, atoms in an element molecule are joined by a chemical bond called a covalent bond. Furthermore, the same atom is represented by a single-colored ball as there is only one type of atom involved in the element molecule. The sticks represent covalent bonds between the atoms of the same kind in a molecule of the element.For more questions on covalent bonds
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Frequency= Wavelength = 502 km Speed= 100 m/s
Answers
Answer:
Explanation:
Wavelength = 100m. Speed = V. 2.) Frequency = 20 Hz. Wavelength = 200 m. Speed = ... 2=1.7m. F=Y/2 f=2×10. 5.) Wavelength = 502 km. Speed= 100 m/s.
Two equal-mass stars maintain a constant distance
of 8.0 x 10^10 m and rotate about a point mid-
way between them at a rate of one revolution every
12.6 yr.
(a) Why don't the two stars crash into one
another due to the gravitational force between
them?
(b) What must be the mass of each star?
Answers
A. Centripetal force acting on the two stars is the reason why the two stars will not crash into one another
B. The mass of each stars, given they maintain a constant distance of 8×10¹⁰ m is 7.68×10²⁷ Kg
A. Why don't the two stars crash into one another?
Centripetal force is the force that acts to keep an object moving in a circle. Since the two stars undergoes revolution, this means they rotate in a circle. Thus, centripetal force is acting on them.
Therefore, we can say that the two stars will not crash into one another due to the centripetal force
B. How do I determine the mass of each stars?
We can obtain the mass of each stars as illustrated below:
F = GM₁M₂ / r²
Note: They rotate mid-way. Thus distance apart (r) = 2r
F = GM₁M₂ / (2r)²
F = GM₁M₂ / 4r²
Also, centripetal force is given as:
F = mv² / r
Thus, we have:
mv² / r = GM₁M₂ / 4r²
But
v = 2πr / T
v² = (2πr / T)² = 4π²r² / T²
M₁ = M₂ = m
Thus, we have
m4π²r² / rT² = Gmm / 4r²
4π²r / T² = Gm / 4r²
Cross multiply
mGT² = 4r² × 4π²r
mGT² = 16π²r³
Divide both sides by GT²
m = 16π²r³ / GT²
From the question given, we have:
Distance (r) = 8×10¹⁰ mPeriod (T) = 12.6 years = 12.6 × 3.154×10⁷ = 3.97×10⁸ sGravitational constant (G) = 6.67×10¯¹¹ Nm²/Kg²Pi (π) = 3.14Mass of each stars (m) =?m = 16π²r³ / GT²
m = [16 × 3.14² × (8×10¹⁰)³] / [6.67×10¯¹¹ × (3.97×10⁸)²]
m = 7.68×10²⁷ Kg
Thus, the mass of each stars is 7.68×10²⁷ Kg
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The star Mintaka in the Orion constellation is about 30x larger than our sun with a radius of 5.74 x 10^9 m. It's surface temperature is about 29,500 K. Consider the spherical surface to behave as a blackbody radiator. What is the rate at which energy is radiated from this star, to 3 sig fig?
Answers
Due to the body is a blackbody e=1
\(\begin{gathered} P=5.6703\cdot10^{-8}\cdot(\pi\cdot(5.74\cdot10^9)^2)\cdot(29500^4-2.7^4) \\ P=4.445\cdot10^{30}W \end{gathered}\)This is the rate of energy over time that this star radiates
If a body travelled a distance 's' in 't'.
What is the distance travelled in 't'
Answers
Answer: Distance traveled in time t is s
Explanation: Self Explanatory
The position-time equation for a certain train is
2.9m + (8.8m/s)t + (2.4m/s2)+2
What is it’s acceleration?
Answers
Answer:
\(a=4.8m/s^2\)
Explanation:
Hello,
In this case, since the acceleration in terms of position is defined as its second derivative:
\(a=\frac{d^2x(t)}{dt^2}=\frac{d^2}{dt^2}(2.9+8.8t+2.4t^2)\)
The purpose here is derive x(t) twice as follows:
\(a=\frac{d^2x(t)}{dt^2}=\frac{d}{dt}(8.8+2*2.4*t)\\ \\a=4.8m/s^2\)
Thus, the acceleration turns out 4.8 meters per squared seconds.
Best regards.
Z. A force that gives a 8-kg objet an acceleration of 1.6 m/s^2 would give a 2-kg object an
acceleration of
a. 0.2 m/s2
b. 0.4 m/s2
c. 1.6 m/s2
d. 6.4 m/s2
Answers
Answer:
\(\boxed {\boxed {\sf D.\ 6.4\ m/s^2}}\)
Explanation:
We need to find the acceleration of the 2 kilogram object. Let's complete this in 2 steps.
1. Force of 1st ObjectFirst, we can find the force of the first, 8 kilogram object.
According to Newton's Second Law of Motion, force is the product of mass and acceleration.
\(F=m \times a\)
The mass of the object is 8 kilograms and the acceleration is 1.6 meters per square second.
m= 8 kg a= 1.6 m/s²Substitute these values into the formula.
\(F= 8 \ kg * 1.6 \ m/s^2\)
Multiply.
\(F= 12.8 \ kg*m/s^2\)
2. Acceleration of the 2nd ObjectNow, use the force we just calculated to complete the second part of the problem. We use the same formula:
\(F= m \times a\)
This time, we know the force is 12.8 kilograms meters per square second and the mass is 2 kilograms.
F= 12.8 kg *m/s²m= 2 kgSubstitute the values into the formula.
\(12.8 \ kg*m/s^2= 2 \ kg *a\)
Since we are solving for the acceleration, we must isolate the variable (a). It is being multiplied by 2 kg. The inverse of multiplication is division. Divide both sides of the equation by 2 kg.
\(\frac {12.8 \ kg*m/s^2}{2 \ kg}= \frac{2\ kg* a}{2 \ kg}\)
\(\frac {12.8 \ kg*m/s^2}{2 \ kg}=a\)
The units of kilograms cancel.
\(\frac {12.8}{2}\ m/s^2=a\)
\(6.4 \ m/s^2=a\)
The acceleration is 6.4 meters per square second.
1. DETERMINING CENTRAL IDEAS Read the text under the subhead "Characteristics of a Traditional Economy." What is the central idea of this paragraph? Restate the central idea in a sentence.
Answers
The central idea of the paragraph is the role that traditional economies play in traditional societies.
A traditional economy is an economy that is based on the concept of individuals producing and exchanging goods that cater for their immediate needs.
What is a traditional economy?A traditional economy is an economy that is based on traditions, the past, and long-held beliefs. Economic choices like production and distribution are influenced by tradition. Traditional economies rely on farming, fishing, hunting, gathering, or some combination of these activities.
Compared to modern economies, traditional economies differ from them in a number of ways. They are geographically and locally based, use a trading system, produce a very little surplus, and don't throw away any of the parts of the things they make.
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Which answer is not a problem associated with sulfur dioxide? A) damage to buildings B) ozone depletion C) vegetation death D) biodiversity loss E) photochemical smog
Answers
Answer:
Answer is A. damage to buildings.
Explanation:
I hope it's helpful!
Select the correct answer from each drop-down menu. Danica observes a collision between two vehicles. She sees a large truck driving down the road. It strikes a small car parked at the side of the road. Complete the passage summarizing the collision. On colliding, the truck applies a force on the stationary car, and the stationary car applies and opposite force on the truck. The front of the truck is designed to crumple in order to , which protects the well-being of the passengers.
Answers
On colliding, the truck applies a force on the stationary car, and the stationary car applies an opposite force on the truck. The front of the truck is designed to crumple in order to absorb the impact of the collision, which protects the well-being of the passengers.
A 5 kW, 230 V motor draws a current of 24 A from the supply. Determine the efficiency of this motor.
Answers
The efficiency of motor is 90.58%.To determine the efficiency of the motor, we need to calculate the input power and the output power, and then divide the output power by the input power
The input power can be calculated using the formula:
Input Power = Voltage × Current
Given that the voltage is 230 V and the current is 24 A, we have:
Input Power = 230 V × 24 A
Input Power = 5520 W (or 5.52 kW)
The output power of the motor is given as 5 kW (since it is a 5 kW motor).
Now, we can calculate the efficiency:
Efficiency = (Output Power / Input Power) × 100%
Efficiency = (5 kW / 5.52 kW) × 100%
Efficiency ≈ 90.58%
Therefore, the efficiency of this motor is approximately 90.58%.
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The square root function graphed below compares the skid distance to thespeed of a car. What is the approximate skid distance of the car if it is going30 mph when it brakes?Speed (mph)50Skid distance (feet)A. 42 ftB. 15 ftC. 22 ftD. 53 ft
Answers
A tungsten filament used in a flashlight bulb operates at 0.20 A and 3.0 V. If its resistance at 20°C is 1.5Ω, what is the temperature of the filament when the flashlight is on?
Answers
Answer:
The temperature of the filament when the flashlight is on is 2020 °C.
Explanation:
The resistivity varies linearly with temperature:
\( R = R_{0}[1 + \alpha*(T-T_{0})] \) (1)
Where:
T: is the temperature of the filament when the flashlight is on=?
T₀: is the initial temperature = 20 °C
α: is the temperature coefficient of resistance = 0.0045 °C⁻¹
R₀: is the resistance at T₀ = 1.5 Ω
When V = 3.0 V, R is:
\(R = \frac{V}{I} = \frac{3.0 V}{0.20 A} = 15 \Omega\)
By solving equation (1) for T we have:
\(T = \frac{R-R_{0}}{\alpha*R_{0}} + T_{0} = \frac{15-1.5}{0.0045*1.5} + 20 = 2020 ^{\circ} C\)
Therefore, the temperature of the filament when the flashlight is on is 2020 °C.
I hope it helps you!
what must be the mass of a rock if a boy applies a 64N force and causes it to accelerate at 4.51m/s2
Answers
first of all the formula of force is F=ma,so we are searching for m,so we can divide a on both sides F/a=m, after this substitute the values given above 64N/4.51=14.2°Kg
On a sunny spring day, Mr. Hane’s family went to a zoo in his town. His daughter looked at an elephant, and she found that the mass of the elephant is 2019 kg. What is the weight of the elephant in Newtons? Use the acceleration due to gravity (g) as 9.8 meters per second squared.
Answers
The weight of the elephant is approximately 19,780.2 Newtons, calculated by multiplying its mass (2019 kg) by the acceleration due to gravity (9.8 m/s²).
To calculate the weight of the elephant in Newtons, we need to use the formula:
Weight = Mass x Acceleration due to gravity
Given that the mass of the elephant is 2019 kg and the acceleration due to gravity is 9.8 m/s^2, we can substitute these values into the formula:
Weight = 2019 kg x 9.8 m/s^2
By multiplying these values, we find that the weight of the elephant is approximately 19,780.2 Newtons.
The weight of an object is the force with which it is attracted towards the center of the Earth due to gravity. The unit of weight is Newtons, and it represents the force required to support the object against gravity. In this case, the weight of the elephant tells us the force exerted by the Earth on the elephant, and it is approximately 19,780.2 Newtons.
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One side of a cube is 5 cm long what is the cubes volume
Answers
Answer:
It should be 125 CM
Explanation:
Volume is Length•Width•Height
A cube is equal on all lengths so, 5•5•5
Answer:
125cm cubed
Explanation:
just search volume calculator lol
Tell me about Susan B. Anthony.
Answers
Answer:
She Had a Criminal Record. In 1872, Anthony registered to vote at a barbershop in Rochester, New York, and cast a ballot in the presidential election.
Explanation:
Select the correct answer.
Which graph shows the correct relationship between kinetic energy and speed?
Answers
Answer:
D
Explanation:
Kinetic energy = 1/2mV^2
From the formula above, we can deduce that kinetic energy is proportional to the square of speed. That is,
K.E = V^2
Graphically, the relationship isn't linear but a positive exponential. Therefore, option D is the correct answer.
Answer:
Its D
Explanation:
Which statements describe independent assortment? Check all that apply. Independent assortment occurs during meiosis II. Independent assortment happens during fertilization. Independent assortment results in different combinations of genes in sex cells. Independent assortment makes offspring identical to their parents. Independent assortment occurs when chromosomes randomly line up in the middle of the cell.
Answers
Answer:
The CORRECT answer is:
C. Independent assortment results in different combinations of genes in sex cells.
E. Independent assortment occurs when chromosomes randomly line up in the middle of the cell.
The statements describe independent assortment are Independent assortment results in different combinations of genes in sex cells and Independent assortment occurs when chromosomes randomly line up in the middle of the cell.
The correct options are C and E.
What is independent assortment?The Principle of Independent Assortment depicts how various qualities autonomously separate from each other when regenerative cells create. Free combination of qualities and their comparing attributes was first seen by Gregor Mendel in 1865 during his investigations of hereditary qualities in pea plants.
So, Independent assortment results in different combinations of genes in sex cells.
Also, Independent assortment occurs when chromosomes randomly line up in the middle of the cell.
Thus, correct options are C and E.
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Now, for each time period, look at the graphs of x, vx, and ax. Briefly describe what is happening for each of these variables during your identified time periods. To view any of these graphs in detail, double-click the graph. You’ll be able to view it in the Data Tool window.
Answers
Alright. It is necessary to identify the variables. Time, grass height, and their connections are separate points. To put it another way, it is both growing and lowering the drop.
From 0 to 1.5 seconds, the object is moving in the positive direction with a constant velocity of 10 m/s with time t. The position graph is a straight line with a positive slope, the velocity graph is a straight line with a constant slope of 10 m/s, and the acceleration graph is a straight line with a slope of 0 m/s^2.
How is it conceivable when spring and summer would be becoming longer in the autumn.
The behavior of these variables will depend on the specific situation and the forces acting upon the object in question. For example, if an object is in free fall, its position "x" will decrease as it falls towards the ground, its velocity "vx" will increase, and its acceleration "ax" will be constant and equal to the acceleration due to gravity.
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The complete question is :
Now, for each time period, look at the graphs of x, vx, and ax. Briefly describe what is happening for each of these variables during your identified time periods. To view any of these graphs in detail, double-click the graph. You’ll be able to view it in the Data Tool window. The graph is attached below
The question examines the interpretation of physics graphs representing displacement (x), velocity (vx), and acceleration (ax). Displacement graphs display object's position changes, velocity graphs show the speed and direction of its movement, and acceleration graphs reflect changes in velocity.
Explanation:The question is asking you to analyze graphs representing displacement (x), velocity (vx), and acceleration (ax). In general, the displacement graph (x) shows the object's position relative to a particular point over time. A slope in this graph indicates movement, while horizontal lines mean the object is stationary.
The velocity graph (vx) displays how fast and in what direction the object is moving. Positive values indicate movement in one direction, and negative values represent movement in the opposite direction. A horizontal line at zero on the velocity graph means the object is at rest.
Finally, the acceleration graph (ax) reveals how velocity is changing over time. A zero on this graph means a constant velocity, even if it isn't zero.
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cheese is made of cheese
Answers
Cheese is made of casein protein, which is originally made from milk and is high in protein. The texture of the cheese is determined by the quality of the milk, so cow's milk cheese differs from goat's milk cheese.
What is a dairy product?
Diary products are made from milk, such as cheese, curd, yogurt, etc., but all of them have different nutrients. The quality of these dairy products depend upon the quality of the milk, as some milking animals have a higher concentration of fats in their milk than other animals. These dairy products are used in different industrial sectors, such as for making ice cream, chocolate, and different food products.
Hence, cheese is made up of casein proteins that are present in the milk.
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Two identical charges are located 1 m apart and feel a 1 N repulsive electric force. What is the charge of each particle.
Answers
The charge on each particle is 3.3×10⁻⁵ C.
What is charge?Charge is the product of current and time.
To calculate the charge on each particle, we use the formula below.
Formula:
q = √(Fr²/k).............. Equation 1Where:
q = Charge on each particleF = Force of repulsionr = Distance between the chargek = coulomb's constant.From the question,
Given:
F = 1 Nr = 1 mk = 8.99×10⁹ Nm²/C²Substitute these values into equation 1
q = √[(1×1)/(8.99×10⁹)]q = 3.3×10⁻⁵ CHence, the charge on each particle is 3.3×10⁻⁵ C.
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What causes an electromagnet to create a magnetic field?
A.The Earth's magnetic field.
B.The poles are attracted to each other.
C.The iron is wrapped with a coiled wire.
D.There is a current flowing through the wire.
Answers
Answer:
D
Explanation:
Have a great day ;)
what is the magnitude of its velocity just before it strikes the ground, if the bottle was thrown straight out horizontally from the tower with a speed of 11.8 m/s?
Answers
There's not enough given information to find the answer.
The horizontal velocity has no effect on anything that happens vertically. To find the object's vertical speed when it hits the ground, we need to know what height it was dropped from, and that's not given in the question.
Since the bottle is falling vertically, the vertical displacement s is the height of the tower from which it was thrown.
If a bottle is thrown horizontally from a tower, its initial vertical velocity is 0 m/s since there is no vertical component to its initial velocity. The only force acting on the bottle in the vertical direction is gravity, which causes it to accelerate downward at a rate of approximately 9.81 m/s² (assuming Earth's gravity).
Since the initial vertical velocity is 0 m/s and the acceleration is 9.81 m/s², you can use the following kinematic equation to find the magnitude of its velocity just before it strikes the ground:
v2=u2+2as
Where:
v is the final vertical velocity (which we're trying to find)
u is the initial vertical velocity (0 m/s)
a is the acceleration due to gravity (-9.81 m/s², negative because it's acting downward)
s is the vertical displacement (which is the height of the tower)
Since the bottle is falling vertically, the vertical displacement
s is the height of the tower from which it was thrown.
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