hich of these best describes Earth’s mantle?
Most dense layer, consists of the outer and inner parts
Thinnest under the oceans and thickest under continents
Middle layer, density increases with depth as pressure increas
Answers
Answer:
Middle layer, density increases with depth as pressure increases
Explanation:
The Earth's mantle is the middle layer of the earth. It is the largest layer of the earth consisting of about 83 % of the earth's volume and continues to a depth of 2900 km. Also, the mantle is hot and made of solid rock. It is hot since it is close to the core and its pressure and density increases with depth causing it to be more solid.
So, the Earth's mantle is the middle layer, density increases with depth as pressure increases.
Related Questions
A flower pot falls off a window sill and falls past the window below. It takes 0.5s to pass through a 2.0m high window. Find how high is the window sill from the top of the window?
Answers
To find the height of the window sill from the top of the window, we can use the equations of motion. We'll assume that the flower pot falls vertically and neglect any air resistance.
Using the equation for vertical displacement:
Δy = v₀t + (1/2)gt²
Since the flower pot falls freely, its initial vertical velocity (v₀) is 0 m/s, and the acceleration due to gravity (g) is approximately 9.8 m/s². We are given the time taken (t) to pass through the window, which is 0.5 seconds, and the height of the window (Δy) is 2.0 meters.
Plugging in the values:
2.0 = 0 + (1/2)(9.8)(0.5)²
Simplifying the equation:
2.0 = 0.1225
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what’s the equation for this
Answers
what matches ????????????????
Answers
Answer:
1st: Radiation
2nd: Conduction
3rd: Convection
Explanation:
I actually learned this before in school. Yay
Design a safety restraint or device for a motorcycle 4-wheeler or go-kart. Design may be drawn or describe. Be sure to explain how your devices protects the driver against collision forces.
this is very urgent, please help!!
Answers
Answer:
Explanation:
One possible safety restraint or device for a motorcycle 4-wheeler or go-kart could be a roll cage. A roll cage is a structure that surrounds the driver and is designed to protect them in the event of a rollover or collision.
The roll cage would be made of strong, lightweight material such as steel or aluminum tubing. It would be attached to the frame of the 4-wheeler or go-kart and would extend upward to surround the driver's head and shoulders. The roll cage would also have additional bracing to provide additional support and protection in the event of a collision.
In the event of a rollover or collision, the roll cage would help to distribute the forces of the impact evenly around the driver, protecting them from the full force of the collision. The additional bracing would also help to prevent the roll cage from collapsing or deforming, providing additional protection for the driver.
In addition to the roll cage, the driver could also wear a safety harness or seat belt to help keep them securely attached to the vehicle and prevent them from being thrown out in the event of a collision. This would provide additional protection against the forces of a collision.
A car has a constant acceleration of 5.6 m/s^2, it starts from test and reaches a speed of 280m/s, find the distance travelled by the car
Answers
Initial speed (u) = 0 m/s (Starts from rest)
Final speed (v) = 280 m/s
Acceleration (a) = 5.6 m/s²
By using equation of motion, we get:
\( \bf \longrightarrow {v}^{2} = {u}^{2} + 2as \\ \\ \rm \longrightarrow {280}^{2} = {0}^{2} + 2 \times 5.6 \times s \\ \\ \rm \longrightarrow 78400 = 11.2s \\ \\ \rm \longrightarrow 11.2s = 78400 \\ \\ \rm \longrightarrow s = \dfrac{78400}{11.2} \\ \\ \rm \longrightarrow s = 7000 \: m \\ \\ \rm \longrightarrow s = 7 \: km\)
\( \therefore \) Distance travelled by the car (s) = 7 km
A skateboarder is skating along a level concrete path. Every so often, to keep himself going, he uses his foot to give himself a push. Discuss why the skateboarder needs to regularly push with a foot when skateboarding along a level surface.
In your answer, you should:
- describe the motion of the skateboarder during a push and between pushes
- identify the forces in action and explain whether they are balanced or unbalanced
- link the net force to the motion of the skateboarder.
Answers
The skateboarder needs to regularly push with their foot when skateboarding along a level surface because of the presence of frictional forces that oppose motion. When the skateboarder gives themselves a push, they increase their forward velocity.
The skateboarder needs to regularly push with their foot when skateboarding along a level surface because of the presence of frictional forces that oppose motion. When the skateboarder gives themselves a push, they increase their forward velocity. However, over time, the velocity decreases due to the force of friction between the skateboard's wheels and the ground, which acts in the opposite direction to the skateboard's motion. During a push, the skateboarder exerts a force on the skateboard that propels it forward. Between pushes, the skateboard moves at a constant velocity due to the balanced forces acting upon it. However, as frictional forces act on the skateboard, it slows down until the next push is required. The net force acting on the skateboarder is unbalanced, as the force of friction acting against the skateboard's motion is greater than the force of the skateboarder's push. The resulting net force causes the skateboarder to slow down over time. Thus, by pushing themselves, the skateboarder overcomes the force of friction and maintains their forward motion.
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I am stumped. Question 3. At 25 degrees C, a 15.000 g sample of an unknown liquid was determined to have a volume of 19.01 mL.At 25 degrees C, water has a density of 0.9982 g/mL. If the unknown liquid had been water, what volume would it have had?
Answers
The volume would liquid have had, 15.067 mL
How to calculate density of liquid ?The density of an object can be calculated as mass divided by volume, or ρ = m/V.
If the unknown liquid had been water, its density would have been equal to 0.9982 g/mL.
Let's call the volume of the unknown liquid V1 and the volume it would have had if it were water V2.
Then, we can write:
m/V1 = 0.9982 g/mL
where m is the mass of the unknown liquid, which is 15.000 g.
Rearranging the equation, we can find V1:
V1 = m/0.9982 g/mL
= 15.000 g / 0.9982 g/mL
= 15.067 mL
So, the volume of the unknown liquid if it had been water would have been 15.067 mL.
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A massless rod is attached to the ceiling by a string. Two weights are hung from the rod: a 0.4-lb weight at its left end and a 1.2-lb weight at its right end. The length of the rod is L and a string is attached (3L/4 from its left end) so that the rod (with attached weights) is horizontal. What is the tension in the string supporting the rod and the attached weights
Answers
The tension in the string supporting the rod and the attached weights is 7.11 N.
Tension in the string supporting the rodThe tension in the string supporting the rod and the attached weights is the sum of the weights supported by the strings.
T = (m1 + m2)g
where;
m1 and m2 are the two masses supported0.4lb + 1.2lb = 1.6lb = 0.725 kg
T = 0.725 x 9.8
T = 7.11 N
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Provide an example of a product you believe is elastic and
explain your answer. Provide an example of a product you believe is
inelastic and explain your answer.
Answers
Example of an elastic product: Smartphone
Explanation: A smartphone is an example of an elastic product. When the price of smartphones decreases, consumers tend to buy more of them, and when the price increases, consumers tend to buy fewer.
Example of an inelastic product: Prescription medication
Explanation: Prescription medication is an example of an inelastic product. Inelastic goods are those for which changes in price have little impact on the quantity demanded.
Example of an elastic product: SmartphoneExplanation: A smartphone is an example of an elastic product. When the price of smartphones decreases, consumers tend to buy more of them, and when the price increases, consumers tend to buy fewer. This is because smartphones are considered non-essential goods with substitutes available in the market. If the price of a particular smartphone model increases, consumers have the option to choose a different brand or model that offers similar features at a lower price. Similarly, if the price of smartphones decreases, consumers may be more willing to upgrade their existing devices or purchase additional smartphones as they become more affordable. The demand for smartphones is responsive to changes in price, making it an elastic product.Example of an inelastic product: Prescription medicationExplanation: Prescription medication is an example of an inelastic product. Inelastic goods are those for which changes in price have little impact on the quantity demanded. Prescription medication is often essential for maintaining health and treating medical conditions, and there may be limited substitutes available. When the price of prescription medication increases, consumers may still continue to purchase it regardless of the price change, as their health and well-being depend on it. The demand for prescription medication is relatively unresponsive to changes in price because it is a necessity and does not have easily accessible alternatives. People are generally willing to pay higher prices for medications they need, even if it means reducing spending on other goods and services. Thus, prescription medication is considered an inelastic product.For more such questions on elastic and inelastic product, click on:
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c. If the box experiences a force of 15 N to the left, along with the 20 N force acting to the right, what is the net force on the box?
Answers
According to the data given in the question the net force on the box is of 5 N.
What does net force mean?All of the forces that are applied to an object are added up to form the net force. As a consequence of the fact that it (force) is a vector and therefore that two forces with identical magnitudes and opposing directions cancel each other out, the resultant force is the total of the forces, or put another way, the net force is just the total of all the forces.
Given data :
Force on box to the left side (F1) = 15 N
Force on box to the right side (F2) = 20 N
Because both forces are in opposite direction
Hence,
Net force = F2 - F1
Net force = 20 - 15
Net force = 5 N.
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have discovered fossils of similar an
different continents. This indicated that continents were on to
7. What did geologists discover?
carth Processes an as earthquakes, onde
8. The continents are parts of enormous sheets of rock called
9. These plates are in constant
Answers
Answer:
7
Explanation:
plates
HELP PLS I NEED THIS
Answers
Answer:
1.318m
Explanation:
The set up is a right angled triangle
Horizontal distance is the distance covered by the hurdler = 0.535m =adjacent
Angle of elevation = 67.9°
Height of the hurdler = opposite
Using the SOH CAH TOA identity
Using the TOA identity
Tan67.9° = opp/adj
Tan67.9 = opp/0.535
Opp = 0.535tan67.9°
Opp = 1.318m
Hence the required height is 1.318m
How long does it take an automobile traveling 62.5 km/h to become even with a car that is traveling in another lane at 41.0 km/h if the cars' front bumpers are initially 114 m apart?
Answers
The time it will take an automobile traveling at 62.5 km/h to become even with a car that is traveling in another lane at 41.0 km/h if the cars' front bumpers are initially a distance of 114 m apart is 19.1 seconds.
What time will it take for two cars traveling at different speeds to be at the same distance?The time that it will take for the two cars traveling to at the same distance can be calculated below as follows:
Let the time it will take the second automobile be T.
the distance traveled by first car = d
distance traveled by second car = d + 114 m
Time = distance / speedTime taken by first car = d / 41.0
Time taken by second car = d + 114 / 62.5
The two times are equal, hence;
d / 41.0 = d + 114 / 62.5
41d + 4674 = 62.5d
21.5d = 4674
d = 217.4 m or 0.2174 km
distance traveled by second car = 0.2174 + 0.114
distance traveled by second car = 0.3314
Time taken by second car = 0.3314 / 62.5
time taken by second car = 0.0053 hours or 19.1 seconds
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The order of increasing wavelength for red (r), blue (b), green (g), and yellow (y) light is?
Answers
based on the galaxies found in the local group of galaxies, the most common type of galaxy in the universe is expected to be
Answers
Based on the galaxies found in the local group of galaxies, the most common type of galaxy in the universe is expected to be the dwarf galaxy. Dwarf galaxies are smaller and less massive than other types of galaxies, such as spiral or elliptical galaxies. They contain fewer stars, with some having only a few hundred or thousand stars, compared to the billions of stars found in larger galaxies.
Dwarf galaxies are also much more numerous than larger galaxies, making up about 80% of the galaxies in the universe. They are thought to have formed early in the history of the universe, and their small size means they have experienced less evolution and disruption than larger galaxies.
Despite their small size, dwarf galaxies play an important role in the evolution of the universe. They are believed to be the building blocks of larger galaxies, and their dark matter content may provide clues to the nature of dark matter, which makes up about 85% of the matter in the universe. Overall, the prevalence of dwarf galaxies suggests that they are an important piece in understanding the structure and evolution of the universe.
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What happens to the brightness of the bulb if the two resistors are exchanged?
Answers
Two light bulbs are parallel-connected in a circuit. If two more light bulbs were put in parallel to the initial ones, Each bulb's brightness would get dimmer as the circuit's overall resistance got lower. Because the circuit's overall resistance would rise, each bulb's brightness would also rise. Even if the circuit's overall resistance would decrease, each bulb's brightness would not change. Even if the circuit's overall resistance would rise, the intensity of each bulb would stay the same.
What are resistors?A resistor is a passive two-terminal electrical component used in circuits to implement electrical resistance. Resistors have a variety of purposes in electronic circuits, including lowering current flow, adjusting signal levels, dividing voltages, biassing active components, and terminating transmission lines.
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how many atoms does each element have in HNo3
Answers
Answer:
1 hydrogen, 1 nitrogen and 3 oxygen atoms.
Explanation:
what is frictional less pulley
Answers
Answer:
Conditions under which the belt and pulleys are operating – The friction between the belt and pulley may decrease substantially if the belt happens to be muddy or wet, as it may act as a lubricant between the surfaces.
Explanation:
I hope that this would be helpful
if space has a hyperbolic geometry, what will happen to two initially parallel flashlight beams as they traverse billions of light-years of space?
Answers
In a space with hyperbolic geometry, the behavior of parallel lines differs from that of Euclidean geometry.
In hyperbolic space, parallel lines diverge from each other as they extend further.If two initially parallel flashlight beams traverse billions of light-years of space in a hyperbolic geometry, they will gradually diverge from each other. The divergence between the beams will increase as they travel a greater distance.
This phenomenon is a consequence of the non-Euclidean geometry of space. In hyperbolic space, the curvature causes parallel lines to "spread out" or diverge. The extent of the divergence will depend on the specific curvature of the space and the distance traveled.
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We see a bolt of lightning and 4 s later we hear the thunderclap. If the speed of
sound in air is 0.2 mi/s, how far away is the lightning?
Answers
Answer:
i guess 0.8 miles away
Explanation:
mathematically:-
speed is given in question
Time is given
and we have to find distance
simply by using speed formula (s) = d/t
we get answer
The bolt of lightning is 0.8 miles far away.
What is speed?The speed of any moving object is the ratio of the distance covered and the time taken to cover that distance.
Given, is a bolt of lightning and 4 s later we hear the thunderclap. If the speed of sound in air is 0.2 mi/s,
Speed = d/t
D = 0.2 x 4
D = 0.8 miles
Thus, the lightning is 0.8 miles far away.
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When there is a temperature inversion, you would expect to experience Group of answer choices clouds with extensive vertical development above an inversion aloft. good visibility in the lower levels of the atmosphere and poor visibility above an inversion aloft. an increase in temperature as altitude increases.
Answers
Temperature inversion leads to an increase in temperature as altitude increases.
The term temperature inversion refers to a situation in which a layer of warm air lies over a layer of cool air. This is also referred to as thermal inversion. This occurs when the air below to loose heat rapidly.
One of the effects of temperature inversion is reduction in visibility. So, thermal inversion leads to an increase in temperature as altitude increases.
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A satellite of mass 1.02 metric tons orbits Earth at a constant height. If the mass of Earth is 6 x 10^24 kg,its radius is 6,360 km,and the gravitational force between Earth and the satellite is 6.6 x 10^3 N, find the height of the satellite’s orbit rounded to the nearest kilometer. Take the universal gravitational constant, G = 6.67 x 10^-11 Nm^2/kg^2.
Answers
Answer:
height = 1.5 x 10⁶ m = 1500 km
Explanation:
We can use the formula of gravitational force from the Newton's Gravitational Law:
\(F = \frac{Gm_{1}m_{2}}{r^2}\)
where,
F = Gravitational Force = 6.6 x 10³ N
G = Universal Gravitational Constant = 6.67 x 10⁻¹¹ N.m²/kg²
m₁ = mass of earth = 6 x 10²⁴ kg
m₂ = mass of satellite = (1.02 tons)(1000 kg/1 ton) = 1.02 x 10³ kg
r = distance between center of earth and satellite = ?
Therefore, using these values in the equation, we get:
\(6.6\ x\ 10^3\ N = \frac{(6.67\ x\ 10^{-11} N.m^2/kg^2)(6\ x\ 10^{24} kg)(1.02\ x\ 10^3\ kg)}{r^2}\\\\r^2 = \frac{(6.67\ x\ 10^{-11} N.m^2/kg^2)(6\ x\ 10^{24} kg)(1.02\ x\ 10^3\ kg)}{6.6\ x\ 10^3\ N}\\\\\)
\(r = \sqrt{61.84\ x\ 10^{12}\ m^2 }\)
\(r = 7.86\ x\ 10^6 m\)
The distance between center of earth and the satellite is equal to the sum of height of satellite and radius of earth:
\(r = height + radius\ of\ earth\\7.86\ x\ 10^6 m = height + 6.36\ x\ 10^6 m\\height = 7.86\ x\ 10^6 m - 6.36\ x\ 10^6 m\)
height = 1.5 x 10⁶ m = 1500 km
A 20 kg satellite has a circular orbit with a period of 2.7 h and a radius of 8.5 106 m around a planet of unknown mass. If the magnitude of the gravitational acceleration on the surface of the planet is 8.4 m/s2, what is the radius of the planet
Answers
Answer:
the radius of the planet is 10.10
Which of the following forms matter?
A. Proteins
B.atoms
C.cells
D. DNA
Answers
Answer:b) atoms
Explanation:which are in turn made up of protons, neutrons and electrons
Answer:
B. Hope it helped brainiest plz
Explanation:
B. is that answer
A car weighing 8000N is traveling at 45 m/s on a perfectly flat, frictionless road. If the driver slams on the brakes, how far will thw car slide before it comes to a stop?
Answers
Without friction, the car cannot stop...
rearrange the equation d=vt-1/2at^2 to find v
Answers
Explanation:
This is the formula for the change in distance (δx) of an object moving with constant acceleration (a) and initial velocity (v), one of the standard Equations of motion. To solve for t first rearrange
12at2+vt−δx=0
then apply the formula for solving a Quadratic equation if our equation is At2+Bt+C=0 then the solution is
t=−B±B2−4AC√2A,
here A=12a, B=v, C=−δx so plugging these in the formula gives
t=−v±✓v2−4(12a)(−δx)√2(12a) (Apply quandriatic equation)
simplifying
t=−v±v2+2aδx√a.
Note how there are two possible solutions one corresponding to the + and one to the -. Sometimes one of these will give a negative time, so you may want to eliminate that. Indeed if δx>0, v>0 and a>0 we only want the positive solution. In other cases you may want to consider both solutions, for instance if we thow a ball up in the air the initial velocity is positive and the acceleration is negative, it will pass a fixed height above your head twice, once on the way up and once on the way down.
62. Two forces are acting on the ring in Figure 22. What is the net force acting on the ring?
Answers
We have that force forces on a plane we Resolve to the x plane and the y plane then we derive the corresponding result using the equation
\(R=\sqrt{(\sum fx)^2+(\sum fy)^2}\)From the question we are told
Two forces are acting on the ring in Figure 22. What is the net force acting on the ring.ForceGenerally the equation for the Net Force is mathematically given as
\(R=\sqrt{(\sum fx)^2+(\sum fy)^2}\)
Therefore
For two forces
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What physical quantity is represented by the slope of a potential energy versus velocity graph
Answers
The slope of the line in the velocity versus time plot is equal to the acceleration of the object.
What is velocity?Velocity refers to the directional velocity of a moving object as an indicator of the rate of change of position observed from a particular frame of reference and measured by a particular time standard.Velocity defines the direction of movement of a body or object. Velocity is primarily a scalar quantity. Velocity is basically a vector quantity. Rate of change of distance. Velocity is the Rate of change of displacement.Velocity is a vector representation of the displacement an object or particle experiences with respect to time. The standard unit for velocity magnitude (also called velocity) is meters per second (m/s). Alternatively, centimeters per second (cm/s) can be used to express velocity magnitude.To learn more about velocity from the given link :
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Un móvil viaja inicialmente con una velocidad de 55 m/s, al cabo de cierto tiempo, su velocidad es de 115 m/s, de repente frena bruscamente con una desaceleración de 14, 500 m/s2. ¿qué distancia recorrerá antes de frenar?
Answers
Answer:
Distancia, S = 2.84 metros
Explanation:
Dados los siguientes datos;
Velocidad inicial = 55 m/s
Velocidad final = 115 m/s
Deceleración = 14500 m/s²
Para encontrar qué tan lejos viajaría el automóvil, usaríamos la tercera ecuación de movimiento;
V² = U² + 2aS
115² = 55² + 2*14500*S
13225 = 3025 + 29000S
29000S = 13225 - 3025
29000S = 10200
S = 29000/10200
Distancia, S = 2.84 metros
Step 1 of 2: If we ignore air resistance, a falling body will fall 16t^2 feet in t seconds. How far will it fall between t= 3 and t=3.2?
Answers
Given data:
* The equation of the distance traveled by the body in terms of time is,
\(d=16t^2\)Solution:
The distance traveled by the body in time t = 3 s is,
\(\begin{gathered} d(3)=16\times(3)^2^{} \\ d(3)=144\text{ ft} \end{gathered}\)The distance traveled by the body in time t = 3.2 s is,
\(\begin{gathered} d(3.2)=16\times3.2^2 \\ d(3.2)=163.84_{}\text{ ft} \end{gathered}\)Thus, the distance traveled between t = 3 s and t = 3.2 s is,
\(\begin{gathered} d(3.2)-d(3)=163.84-144 \\ d(3.2)-d(3)=19.84ft_{} \end{gathered}\)Thus, the body falls 19.84 ft or approx 20 ft in between 3 s and 3.2 s.