the figure below shows a planet traveling in a counterclockwise direction on an elliptical path around a star located at one focus of the ellipse. when the planet is at point a,
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When the planet is at point A, given the location of the star, B. It's speed is increasing.
Why is the speed increasing ?When a planet revolves around a star, it adheres to a curved pathway as a result of the gravitational pull between both entities. As per Kepler's planetary motions laws, a planet orbiting a particular star accelerates when it's at proximal distance to the star and decelerates when it is further away from it. These discrepancies stem from the stronger gravitational force that arises as the two objects are nearer in proximity.
The speed of the planet is therefore likely increasing because it is approaching the star and so the gravitational pull is stronger.
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Options for this question are:
a. its speed is constant. b. its speed is increasing c. its speed is decreasing d. its speed is a maximum. e. its speed is a minimum.
Related Questions
Use the information from the graph to answer the question. A graph titled Velocity versus Time shows time in seconds on the x axis, numbered 0 to 25, velocity in meters per second on the y axis, numbered 0 to 40. A line starts at (0, 10) and ends at (25, 35). What is the total displacement of the object? m
Answers
Answer:
its -2.5 on edge 2020
Explanation:
i just took the quiz answer above is the next part of the quiz, answer is 562.5
Answer:
What is the acceleration of the object?
-2.5 m/s2
If the unbalanced force is -20.0 N and the mass of the object is 3.75 kg, what is the acceleration of the the object while this force is acting?
Answers
Answer:
a=-5.3m/s2
Explanation:
F=-20N
m=3.75kg
a=?
F=am /:m
a=F/m
a=-20N/3.75kg
a=-5.3m/s2
dentify the following terms associated with the water cycle.
Water changes from a gas to a liquid phase.
Water falls to the Earth in the form of a liquid or solid.
Liquid water changes into a gas.
Water evaporates from the leaves of plants.
Answers
Answer:
condensation, precipitation, evaporation, transpiration
Explanation:
condensation is when gas condenses into liquid, precipitation is when water comes from the sky like in rain, evaporation is when water is converted from liquid to gas, transpiration is when water is evaporated from leaves.
Sam kicks a soccer ball with an initial velocity of 40 ms-1. If he kicked the ball at an angle of 550, how far did he kick the ball? What was its maximum height? How long was it in the air.
Answers
Answer:
1. Range = 153.42 m.
2. Maximum height = 54.78 m
3. Time of flight = 6.69 s
Explanation:
From the question given above, the following data were obtained:
Initial velocity (u) = 40 ms¯¹
Angle of projection (θ) = 55°
1. Determination of the range.
Initial velocity (u) = 40 ms¯¹
Angle of projection (θ) = 55°
Acceleration due to gravity (g) = 9.8 ms¯²
Range (R) =?
The range i.e how far the ball went can be obtained as follow:
R = u² Sine 2θ /g
R = 40² × Sine (2×55) / 9.8
R = 1600 × Sine 110 / 9.8
R = 1600 × 0.9397 /9.8
R = 153.42 m
2. Determination of the maximum height.
Initial velocity (u) = 40 ms¯¹
Angle of projection (θ) = 55°
Acceleration due to gravity (g) = 9.8 ms¯²
Maximum height (H) =?
H = u² Sine² θ / 2g
H = 40² × (Sine 55)² / 2 × 9.8
H = 1600 × (0.8192) ² / 19.6
H = 54.78 m
3. Determination of the time of flight
Initial velocity (u) = 40 ms¯¹
Angle of projection (θ) = 55°
Acceleration due to gravity (g) = 9.8 ms¯²
Time of flight (T) =?
T = 2u Sine θ / g
T = 2 × 40 × Sine 55 / 9.8
T = 80 × 0.8192 / 9.8
T = 6.69 s
1. Think of an engineering problem where having an object with a high (k) value would be a benefit?
2. Think of an engineering problem where having an object with a low (k) value would be a benefit?
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An example of a project where an object with a high (k) value would be a benefit is one that has to do with the design of a rocket engine. Metals that have very high thermal conductivity are useful for building rocket engines. This is because of the amount of energy/heat that is required to be combusted by these parts to achieve a break from the earth's force field of gravity.
While engineering problems where having an object with a low (k) value would be a benefit is those that have to do with buildings. Buildings are made from concrete and brisk with have low thermal conductivity hence low
What does (k) Value mean?A k-value (also known as a k-factor or lambda value) is a measure of a material's thermal conductivity, or how quickly heat moves through it. It is a basic quality that is independent of material quantities.
Thermal conductivities of different building materials may be compared using k-values. This is often useful in determining the possibility of heat transmission between the inside and exterior of a structure.
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Which term best describes the form of beryllium shown
Answers
Answer:
✓ Ion
Explanation:
Which term BEST describes the form of beryllium shown? Protons=4 Neutrons=5 Electrons=2
✓ Ion
The half-life of 14C is 5730 yr, and a constant ratio of 14C/12C = 1.3 x 10-12 is maintained in all living tissues. A fossil is found to have 14c/12C = 3.07 x 10-13. How old is the fossil? Your response differs from the correct answer by more than 10%. Double check your calculations. yr Need Help? Read It
Answers
The fossil's age can be determined using the concept of radioactive decay and the known half-life of 14C. The estimated age of the fossil is approximately 8522 years.
Given that the ratio of 14C/12C in living tissues is maintained at 1.3 x 10-12 and the fossil's ratio is measured to be 3.07 x 10-13, we can calculate its age.
By comparing the ratios, we can see that the fossil has undergone a decrease in the amount of 14C relative to 12C. The decrease in the ratio occurs due to the radioactive decay of 14C over time. Since the half-life of 14C is 5730 years, we can calculate the number of half-lives that have passed by taking the logarithm of the ratio change:
log(3.07 x 10-13 / 1.3 x 10-12) / log(0.5) = -0.448 / -0.301 = 1.487
Therefore, the fossil is approximately 1.487 half-lives old. Multiplying this by the half-life of 5730 years gives us the age of the fossil:
1.487 x 5730 years ≈ 8522 years
So, the estimated age of the fossil is approximately 8522 years.
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elements and their properties section 2 chart
Answers
Answer:
Explanation:
i think this will help
A 35-gram stainless steel ball on a track is moving at a velocity of 9 m/s. On the same track, a 75-gram stainless steel ball is moving at a velocity of –7 m/s. After colliding, the 35-gram ball moves at a velocity of –15 m/s. Assume there is no net force on the system.
What is the velocity of the 75-gram ball after the collision? Round to the nearest tenth.
Answers
Explanation:
the answer is in the above image
Given:
mass of first ball, m1 = 35g
mass of second ball, m2 = 75g
velocity of first ball before collision, u1 = 9m/s
velocity of second ball before collision, u2 = -7m/s
velocity of first ball after collision, v1 = -15m/s
velocity of second ball after collision, v2 = ? (To Find)
Now it is given that there is no net force on the system of two balls
according to the Law of Conservation of Momentum so, here momentum is constant before and after collision:
P1 = P2
m1u1 + m2u2 = m1v1 + m2v2
35g*9m/s + 75g*(-7m/s) = 35g*(-15m/s) + 75g*v2
v2 = (35g*9m/s + 75g*(-7m/s) - 35g*(-15m/s))/75g
v2 = 4.2m/s
therefore, the velocity of second ball after collision is 4.2m/s
What is the formula of conservation of momentum?
As a result, the equation of the law of conservation of momentum is as follows: m1 u1 + m2 u2 represents the total momentum of particles A and B before the collision, and m1 v1 + m2 v2 represents the total momentum of particles A and B after the collision.
What is momentum unit?Momentum. If the mass of an object is m and it has a velocity v, then the momentum of the object is defined to be its mass multiplied by its velocity. momentum = mv. Momentum has both magnitude and direction and thus is a vector quantity. The units of momentum are kg m s−1 or newton seconds, N s.
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Question 33
Why can human ears hear dolphins' vocalizations while under the water but cannot hear them well on land?
A
The waves in the water travel faster and at a higher frequency than they travel on land.
B
The waves in the water travel faster and at a lower frequency than they travel on land.
C
The waves in the water travel slower and at a higher frequency than they travel on land.
D
The waves in the water travel slower and at a lower frequency than they travel on land.
Answers
Answer:
A. The waves in the water travel faster and at a higher frequency than they travel on land.
Explanation:
The main reason why human ears can hear dolphins' vocalizations while under the water but cannot hear them well on land is because water is denser than air and air particles travel faster in denser particles.
Denser particles also ensures that the frequency of the waves move faster which in turn produces a faster and louder result.
3. The runner ran a distance 100m with a force of 45N. How much work
was done? (W=Fx d)
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Answer:
Hope my answer is understandable to you.
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?
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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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find the moment of inertia of the system about an axis through the center of the square, perpendicular to its plane (an axis through point o in the figure).
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As a result, the system has a moment of inertia of 0.0636 kg-m around an axis that passes through the center of square and is perpendicular to its plane.
What are the definition and measurement of the moment of inertia?Moment of inertia is the propensity of an object to continue rotating at a constant speed or in a condition of rest. More torque is needed to shift this state the higher the moment of inertia. Similar to how force affects linear motion, torque affects rotational motion. It has the SI unit kg. metre2.
What does moment of inertia mean in everyday terms?When a body resists angular acceleration, it has a certain amount of moment of inertia, which is calculated as the product of the mass of each particle times the square of the particle's distance from the rotational axis. A scalar quantity is the moment of inertia.
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The corrrect question is
Four small spheres, each of which you can regard as a point of mass 0.200 kg, are arranged in a square 0.400 m on a side and connected by light rods. Find the moment of inertia of the system about an axis through the center of the square, perpendicular to its plane.
let's suppose I have a glacier moving at a rate of 64m per day. What would be the steps to converting it to Kilometers per Hour? Also, expressing the km/h using two significant figures
Answers
Answer: \(2.7*10^{-2} km/h\)
Explanation:
First you need to know the units that your quantity has. Velocity is given in length divided by time. So to transform from m/day to km/h we need to convert separately length from m to km and time from day to h. For length we have:
1km -------- 1000m
x ------------ 64m
x = 64/1000 = 64*\(10^{-3}\) km
Next we convert the time:
1 day = 24h
And now we just make the proper substitution:
\(64\frac{m}{day} = \frac{64m}{1 day} = \frac{64*10^{-3} km}{24 h} = \frac{64*10^{-3}}{24} \frac{km}{h} = 2.7*10^{-2} km/h\)
Note that our result has two significant figures (2.7) since 10 to -2 does not count as significant figures.
How many cm are in 43 inches?
Answers
Answer:
109,22
Explanation:
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Answer:
The correct answer is 109.22
Explanation:
Multiply the inches, 43, by the number of centimeters per inch, 2.54, and you will get your answer.
A block glass of mass 187.5g is 5cm long t 2cm thick and 75cm high. calculate the density of the in kg/cm^3
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Answer:.00025 or .25 x 10^-3
Explanation:weird units! Density=mass/volume=.1875 kg/(2x75x5).
PLEASE HELP, i really need the help because i dont understand
Answers
The y-component of the vector is 4.97 m.
What is a vector?A vector is a quantity that has both magnitude and direction.
To calculate the y-component of the vector in the diagram above, we use the formula below.
Formula:
Y = Hcos∅.......... Equation 1From the question,
Given:
H = 22.3 m∅ = 77.1°Substitute these values into equation 1
Y = 22.3(cos77.1)Y = 22.3×0.223Y = 4.97 m.Hence, the y-component of the vector is 4.97 m.
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The Appalachian mountain range in the Eastern United States was once much taller than the Rocky mountain range in the Western United States. Currently, however, the Appalachian mountain range is much smaller than the Rocky mountain range
What do you think may have caused this change in height?
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explanation
ik
Answer:
The answer is erosion
Explanation:
I did this before
a lion is running at constant speed toward a gazelle that is standing still, as shown in the top figure above. after several seconds, the gazelle notices the lion and accelerates directly toward him, hoping to pass the lion and force him to reverse direction. as the gazelle accelerates toward and past the lion, the lion changes direction and accelerates in pursuit of the gazelle. the lion and the gazelle eventually each reach constant but different speeds. which of the following sets of graphs shows a reasonable representation of the velocities of the lion and the gazelle as functions of time?
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The graph shown in the first option nicely plots the lion's and gazelle's velocities as a function of time, so option A is the correct answer.
Velocity is the rate of change of displacement over time.
It has SI units as m/s.The total amount of movement of an object per unit time is also called velocity. It depends on both the size and direction of the moving object.Velocity can also be called as speed when distance is taken into consideration instead of displacement.As mentioned in the problem of running at a constant speed towards a gazelle with a standing lion as shown above.
So option A is correct.
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it is made up of small particles
Answers
Answer:
Everything is made up of tiny particles called Matter
There is said to be a short circuit when
A. one part of a closed circuit has a very low resistance and almost all the current will flow through this part and very little current will flow through the other part.
B. one part of a parallel circuit has a very low resistance and almost all the current will flow through this part and very little current will flow through the other part.
C. one part of a parallel circuit has a very low resistance and very little of the current will flow through this part and almost all the current will flow through the other part.
D. one part of a closed circuit has a very low resistance and very little of the current will flow through this part and almost all the current will flow through the other part.
Answers
A short circuit is said to have occurred when two nodes of a circuit at different voltages are abnormally connected
There is said to be a short circuit when; One part of a parallel circuit has a very low resistance and almost all the current will flow through this part and very little current will flow through the other part
The correct option is option B.
Reason:
A circuit has to be closed or the the current path has to be closed for
current to flow. A short circuit occurs when current in a circuit flows
through an abnormal path, such as a bridge in a connection to a load that
creates a parallel path for current flow.
Almost all the current flows through the parallel path due to the low
resistance in the connection (almost zero) and the proximity to the power
source, thereby preventing current from reaching its intended destination
Therefore, the correct option is option B.;
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An insulated nozzle has saturated water vapor at 1000 kPa entering with a velocity of 100 m/s and at steady state. The pressure at the exit is 800 kPa with a quality of 0.9. Determine the velocity at the outlet Multiple Choice A. 661 m/s B. 467 m/s C. 219 m/s D. 102 m/s
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The velocity at the outlet of the insulated nozzle is 661 m/s. The correct option is A. To solve this problem, we can use the principle of conservation of mass and energy. We know that at a steady state, the mass flow rate at the inlet and outlet of the nozzle must be the same.
Therefore, we can use the mass flow rate equation to find the specific volume at the inlet and outlet.
Using the steam tables, we can find that the specific volume at the inlet is 0.1947\(m^3/kg\), and at the outlet is 0.8775 \(m^3/kg.\)
Next, we can use the Bernoulli equation to relate the pressure, velocity, and specific volume at the inlet and outlet.
\(P1 + 1/2ρV1^2 + ρgh1 = P2 + 1/2ρV2^2 + ρgh2\)
Assuming that the nozzle is horizontal and at the same height, we can simplify this equation to:
\(P1 + 1/2ρV1^2 = P2 + 1/2ρV2^2\)
Solving for V2, we get \(V2 = sqrt[(2*(P1-P2))/(ρ*(1-q))].\) Substituting the given values, we get V2 = 661 m/s.
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The box is being pushed to the right with a force of 300 newtons, and to the left with a force of 400 newtons. What is the magnitude of the net force on the box?.
Answers
pushed to the right = 300 newtons
pushed to the left = 400 newtons
\(400-300=100\)
\(\fbox{100 Newtons to the left}\)
The diameter of a copper wire is thought to be approximately 0.3mm. Which instrument should be used to obtain a more accurate measurement of the diameter of the wire? A measuring tape B metre rule C micrometer D ruler 2
Answers
Answer:
C
Explanation:
The correct answer should be the micrometer.
The micrometer is an instrument that is capable of measuring the component of an object to very high precision. It is used to obtain accurate measurements in engineering.
In the case of the copper wire, the diameter of 0.3 mm was an approximation and a more accurate measure of the diameter would be obtained by using the micrometer.
The correct option is C.
Peaks in standing wave are called
Answers
Answer:
Antinode
Explanation:
The antinode is a point along the wave that has the greatest maximum velocity in the y-direction.
a duck is swimming at the center of a circular lake. a fox is waiting at the shore, not able to swim, willing to eat the duck. it may move around the whole lake with a speed four times faster than the duck can swim. as soon as duck reaches the surface, it can fly, but not within the pond. can the duck always reach the shore without being eaten by the fox?
Answers
The duck can always reach the shore without being eaten by the fox.
Assume that the duck is swimming in a circular path around the centre of the lake and that the fox is waiting at a fixed point on the shore. Since the fox is four times faster than the duck, it can run along the shore at a constant speed that is also four times the speed of the duck's swimming.
Now, imagine that the duck swims around the lake one full time, starting at the point farthest from the shore where the fox is waiting. The duck will take some amount of time to complete this circuit, during which the fox will also have travelled some distance around the lake.
However, since the duck is swimming in a circular path, it will eventually cross the point on the opposite side of the lake from where it started. At this point, the duck is closer to the shore than the fox is. Furthermore, since the duck can now fly, it can reach the shore before the fox catches up to it.
So, it will eventually reach a point where it is closer to the shore than the fox and can fly the rest of the way to safety. Therefore, the duck can always reach the shore without being eaten by the fox.
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3. Can a theory "grow up" to become a law?
Answers
Answer:
Theories do not "grow up" to be laws once they are proven. In fact, scientists are still refining Newton's laws of gravity.
Explanation:
A vector has an x-component
of 19.5 m and a y-component
of 28.4 m.
Find the magnitude of the
vector.
Answers
Answer:
34.45m
Explanation:
Magnitude of a vector is equal to the square root of sum of squares of x & y vectors.
Magnitude = \(\sqrt({x^2} + {y^2})\)
= \(\sqrt({19.5^2} + {28.4^2})\)
=34.45m
Explain a lever and a pivot in a full sentence
Answers
Answer:
The lever is a movable bar that pivots on a fulcrum attached to a fixed point. The lever operates by applying forces at different distances from the fulcrum, or a pivot. As the lever rotates around the fulcrum, points farther from this pivot move faster than points closer to the pivot.
IF HELPED MARK AS BRAINLIEST
I need help I do test I scared
Answers
Answer:
i think the answer is #3. :)