Explanation:
The situation described here is parabolic movement. However, as we are told that the rock was projected upward from the surface, we will only use the equations related to the Y axis.
In this sense, the movement equations in the Y axis are:
[tex]y-y_{o}=V_{o}.t+\frac{1}{2}g.t^{2}[/tex] (1)
[tex]V=V_{o}-g.t[/tex] (2)
Where:
[tex]y[/tex] is the rock's final position
[tex]y_{o}=0[/tex] is the rock's initial position
[tex]V_{o}=30\frac{m}{s}[/tex] is the rock's initial velocity
[tex]V[/tex] is the final velocity
[tex]t[/tex] is the time the parabolic movement lasts
[tex]g=1.62\frac{m}{s^{2}}[/tex] is the acceleration due to gravity at the surface of the moon
As we know [tex]y_{o}=0[/tex] , equation (2) is rewritten as:
[tex]y=V_{o}.t+\frac{1}{2}g.t^{2}[/tex] (3)
On the other hand, the maximum height is accomplished when [tex]V=0[/tex]:
[tex]V=V_{o}-g.t=0[/tex] (4)
[tex]V_{o}-g.t=0[/tex]
[tex]V_{o}=g.t[/tex] (5)
Finding [tex]t[/tex]:
[tex]t=\frac{V_{o}}{g}[/tex] (6)
Substituting (6) in (3):
[tex]y=V_{o}(\frac{V_{o}}{g})+\frac{1}{2}g(\frac{V_{o}}{g})^{2}[/tex] (7)
[tex]y_{max}=\frac{{V_{o}}^{2}}{2g}[/tex] (8) Now we can calculate the maximum height of the rock
[tex]y_{max}=\frac{{(30m/s)}^{2}}{(2)(1.62m/s^{2})}[/tex] (9)
Finally:
[tex]y_{max}=277.777m[/tex]
Which sector is not part of the circular flow model of the economy ?
A. Government sector
B.business sector
C.consumer sector
D.market sector
Answer:
a government sector
Explanation:
Among the given, the sector which ic not a part of the circular flow model of the economy is government sector. The flow includes the business sector, markets and households.
What is circular flow model of economy ?The circular flow model shows the movement of money in society. Money is sent back and forth between producers and employees in the form of wages and payments for goods. An economy is essentially an unending circle of money flow.
The model is constructed in this manner, but actual cash flows are more intricate. To more accurately represent the complex modern economies, economists have included extra variables.
Understanding the flow of money throughout an economy is the fundamental goal of the circular flow model. It divides the economy's major stakeholders into two groups: families and companies.
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One can lessen the force that acts on an object
True or false
Answer:
True
Explanation:
It is possible to reduce/lessen the force that is acting on an object. For example, if you were pushing on a box and wanted to push less on the box, that would be possible.
What does the law of conservation of energy state about energy in a closed system?
The total amount of energy in a closed system must stay constant.
Answer:
The system's energy can not be created, or destroyed. It's transformable from one shape to another. The energy stays conserved in a closed system. It is isolated in the surrounding area.
a body is dropped from a height of 240m. (i)How long does it take to reach the ground. (ii) What is the velocity with which it will strike the ground.
Answer:
7.0 s, 69 m/s
Explanation:
If we take down to be positive, then the time to reach the ground is:
x = x₀ + v₀ t + ½ at²
240 m = (0 m) + (0 m/s) t + ½ (9.8 m/s²) t²
t = 7.0 seconds
The final velocity is:
v² = v₀² + 2a(x - x₀)
v² = (0 m/s)² + 2(9.8 m/s²) (240 m - 0 m)
v = 69 m/s
Step 8: Observe How Changes in the Speed of the Bottle Affect Beanbag Height
Calculate the average maximum height for all three trials when the speed of the bottle is 2 m/s, 3 m/s, 4 m/s, 5 m/s, and 6 m/s.
Record your calculations in Table B of your Student Guide.
When the speed of the bottle is 2 m/s, the average maximum height of the beanbag is m.
When the speed of the bottle is 3 m/s, the average maximum height of the beanbag is m.
When the speed of the bottle is 4 m/s, the average maximum height of the beanbag is m.
When the speed of the bottle is 5 m/s, the average maximum height of the beanbag is m.
When the speed of the bottle is 6 m/s, the average maximum height of the beanbag is m.
Answer:
When the speed of the bottle is 2 m/s, the average maximum height of the beanbag is 0.10 m.
When the speed of the bottle is 3 m/s, the average maximum height of the beanbag is 0.43 m.
When the speed of the bottle is 4 m/s, the average maximum height of the beanbag is 0.87 m.
When the speed of the bottle is 5 m/s, the average maximum height of the beanbag is 1.25 m.
When the speed of the bottle is 6 m/s, the average maximum height of the beanbag is 1.86 m.
Sorry for not answering early on! If anyone in the future needs help, I got these answers from 2020 egenuity, though I can't post the picture for proof. Stay Safe!
The speedometer in your car reads 55 mi/h. This represents the _____ of the car.
The mileage of the car how fast it is going
The speedometer in your car reads 55 mi/h. This represents the Instantaneous speed of the car.
Explanation:
Speed is a measurement of distance and time. Speedometers have been installed in vehicles to indicate the speed at which the driver drives the vehicles and control is also been used in few vehicles for the safety of the passengers like in school buses. When the car reads a reading in the speedometer, it denotes the instant speed of the car rather than the average speed.
how do you rearange equations
Rearrange the equation so that the unknown variable is by itself on one side of the equals sign (=) and all the other variables are on the other side. RULE #1: you can add, subtract, multiply and divide by anything, as long as you do the same thing to both sides of the equals sign.
What components are needed in an experiment?
Answer:
A Hypothesis, and a control variable.
Explanation:
What term is used to describe a system that looses energy to objects that are not part of the system
A. Raised
B. Low
C. Open
D. Closed
Answer: Open system
According to thermodynamics, if a system exchanges matter and energy with its environment it is an open system. For example, human beings and animals can be considered as open systems, since we take chemical energy in the form of food and perform work on our surrounding environment when moving and doing activities.
-
Acceleration is a vector quantity
Acceleration is a vector quantity because it has both magnitude and direction.
Acceleration is a vector quantity that describes how an object's velocity changes over time in both magnitude and direction. It has both magnitude and direction, making it a vector, and is measured in meters per second squared.
Explanation:Acceleration is a vector quantity which means that it has both magnitude and direction. Acceleration provides information about how the motion of an object changes over time. It is always in the same direction as the change in velocity, which is also a vector. Since velocity can change in magnitude (speed) or direction, acceleration can be a change in speed, direction, or both. The SI unit for acceleration is meters per second squared (m/s²). An important aspect to note is that acceleration does not convey the actual velocity of the object; it only describes how the velocity is changing.
watching television with the remote control in your hand which of the folling exerts the greatest gravitational force on you
Answer:
the remote
Explanation:
Answer:
the couch you are sitting on
Explanation:
John's truck has more mass than his brother Thomas' truck. John's truck
has less inertia
will accelerate more quickly
needs more force to move
is 100 percent efficient
Final answer:
A truck with greater mass has more inertia and needs more force to achieve the same acceleration as a lighter truck. A heavier truck does not have less inertia, nor can it be 100 percent efficient in terms of energy use.
Explanation:
Based on Newton's laws of motion, particularly the second law which states that force equals mass times acceleration (F = ma), it is clear that an object with more mass will have more inertia. Inertia is the resistance of any physical object to any change in its velocity. A truck with more mass than another will inherently have more inertia, not less, because inertia is directly proportional to mass.
Because of this direct proportionality, a truck with more mass will also need more force to move or accelerate at the same rate as a lighter truck. This is also why heavier objects accelerate slower than lighter ones when the same force is applied. Regarding efficiency, no machine or vehicle, including trucks, can be 100 percent efficient due to the second law of thermodynamics, which says that some energy is always lost in the form of heat or other non-usable forms during energy transfers.
In a Chemical reaction, the combined molar masses of the reactants is greater than the combined molar mass of the products . true or false
I believe the answer is true
In a chemical reaction, molar mass of reactants and products are equal. So the given statement is FALSE.
Explanation:
To form a new product, there occurs a reaction between the compounds and the elements then there will be no loss or gain in the mass.
This is the being stated in “Law of conversation of mass”. During a process of chemical change reactants, the total mass will be equal to product's total mass.
If you want to know how energy will move between two objects, what do you
need to know about the objects?
A. Their densities
B. Their heats
c. Their temperatures
D. Their states
Answer:
I believe it is C. Their Temps.
Explanation:
Hope my answer has helped you!
To understand how energy moves between two objects, you need to know their temperatures, states, and heats.
Explanation:In order to determine how energy will move between two objects, you need to know their temperatures, states, and heats. Temperature is a measure of the average kinetic energy of the particles in an object, while the state refers to whether the object is a solid, liquid, or gas. Heat is the transfer of energy between objects due to a difference in temperature, and it flows from a higher temperature object to a lower temperature object.
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Rajesh conducts an experiment to determine how quickly three different substances absorb heat. He measures the temperature of each substance over time. If he wants to quickly compare the heat absorption rates of the three substances, which data representation will probably be most useful to him?
Answer:
Graph
Explanation:
I already answered this question
Answer: graph
Explanation:
Help! ASAP
Which of the following is a circular wave?
Answer:
Graph B.
Explanation:
it is a wave, they are fun to watch
Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?
Answer:
I think it i either the 1st one with all the arrows pointing to the ball because it has some speed so it is going fast horizontally 2) the ball has to stay on the ground so that's where the gravitational pull comes in (the arrow pointing down and pointing up). 3) when the ball is moving horizontally the air which is pushing the ball from the left pushes it back a little hence slowing it a little.
Explanation:
This is my guess anyways, feel free to choose this answer my second opinon was the second one which is the one with the arrow pointing down and arrow pointing right and left ( the one which says movement of the ball )
Answer:
Option A)
Explanation:
Here we know that ball is moving horizontally so the force on the ball perpendicular to the plane must be balanced
We can say that gravitational force "mg" is balanced by the normal force due to ground. Which shows that two equal and opposite arrows must be there on ball in vertical direction.
Now in horizontal direction there may be unbalanced force in two directions.
One of the force may be due to air drag and friction on the ground. While other force is due to some external agent.
So here correct answer is represented by first figure or we can say it is given by
Option A)
which of the following is not a simple machine?
A. wedge
B. screw
C. lever
D. fulcrum
Answer:
D. Fulcrum
Explanation:
A wedge is a simple machine. A screw is a simple machine. A lever is a simple machine but fulcrum is the pivot point in a lever.
A piece of blue paper appears blue because the paper
a. reflects all colors of light except blue
b. absorbs all colors of light except blue
c. refracts all colors of light except blue
d. is transparent to all colors of light except blue
A piece of blue paper appears blue because the paper absorbs all colors of light except blue. (b)
So any light that bounces off of the paper and enters your eye must be blue light !
A piece of blue paper appears blue because the paper b. absorbs all colors of light except blue
What is meant by absorption of light ?
The absorption of light makes an object dark or opaque to the wavelengths or colors of the incoming wave
When an object receives light, it absorbs some wavelengths and reflects others. The ones it reflects are the ones we see as color hence , correct answer will be b. absorbs all colors of light except blue
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what are reactants in chemical equations? What are the Products
Answer:
Reactants are initiators of a chemical reaction whereas products are substances produced as the end of that reaction.
Explanation:
In a chemical reaction, there are two categories of substances involved: reactants and products.
The reactants are those substances utilized in a chemical reaction which undergo certain changes to produce different substances at the end of the reaction known as products.
On can write a chemical equation as:
M+N→MN, where M and N are the reactants and MN is the product.
For example,
Zn + S → ZnS
|___| ↓
Reactants Products
As you can notice when writing a chemical equation, reactants are always written on left hand side of the arrow and the products on the right hand side.
Calculate the total resistance for ten 120 ohm resistors in series
The total effective resistance of several resistors in SERIES is just the sum of all the individual resistances.
So the effective resistance of ten 120-ohm resistors in series is
(120 + 120 + 120 + 120 + 120 + 120 + 120 + 120 + 120 + 120) .
A much easier way to write it is . . . (10) x (120) .
Total effective resistance = 1,200 ohms .
The total resistance when ten resistors of the resistance of 120 Ω connected in series is equal to 1200 Ω.
How to calculate the effective resistance of resistors connected in series?In a series combination of resistors, the resistors are connected end-to-end. Consider two resistors, R₁ and R₂ are connected in a series combination. If two resistors are connected in series, then their effective resistance will be given by:
Total Resistance, R = R₁ + R₂
In a series connection of resistors, the current will flow through one resistor and then through another resistor. The same current flows through every resistor in one direction. The total voltage of the circuit is equal to the sum of all the voltage drops across the resistors.
Given the resistance of each resistor = 120 Ω
The number of resistors = 10
Total resistance, R = R₁ + R₂ + R₃ + R₄ +R₅+ R₆ +R₇+R ₈ +R₉+ R₁₀
R = 10 ×120
R = 1200 Ω
Therefore, the total resistance of 10 given resistors is 1200 Ω.
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Which statements apply to transverse waves? Check all that apply.
The waves have a trough.
Particles move only small distances.
The waves have a crest.
The energy is transferred perpendicular to the direction of the wave motion.
Particles travel the length of the wave, moving in an up-and-down motion,
Correct Answers:
- The waves have a trough
- the waves have a crest
- the energy that is transferred move in a perpendicular direction
- particles move in an up and down motion
Answer:
A, c, d, e
Explanation:
the moon has a diameter of 2,159 miles. what does this distance equal in Kilometers?
A:3,454.4km
B:143,042.7km
C: 2,274.1km
D:12,761.5km
Answer: A
Explanation: It isn't the exact answers but its is the closest. The exact answer is 3474.6.
Final answer:
To convert the Moon's diameter from miles to kilometers, multiply 2,159 miles by the conversion factor of 1.60934 to get approximately 3,474.76 kilometers, rounding to 3,454.4 kilometers, which is option A.
Explanation:
To convert the diameter of the Moon from miles to kilometers, we use the conversion factor that 1 mile is approximately equal to 1.60934 kilometers. Therefore, if the Moon's diameter is 2,159 miles, we multiply this number by the conversion factor to find the equivalent distance in kilometers.
2,159 miles * 1.60934 km/mile = 3,474.76146 kilometers
The correct answer from the given options would be A: 3,454.4km, which is the approximate value when rounded to one decimal place.
The power in an electrical circuit is given by the equation P= RR, where /is
the current flowing through the circuit and Ris the resistance of the circuit.
What is the current in a circuit that has a resistance of 30 ohms and a power
of 2 watts?
A. 15 amps
B. 0.26 amps
C. 3.9 amps
D. 0.067 amps
Answer:
B
Explanation:
P = I² R
If P is 2 watts and R is 30 ohms:
2 = I² (30)
I = √(1/15)
I ≈ 0.26 A
Answer:
B. 0.26 amps is your answer
please hurry!!!!!!!.......
Answer:
B
Explanation:
D is nonsense. The current keeps coming through all lights.
A is wrong. The exact opposite happens. More bulbs more resistance.
C is wrong. More resistance less current, not more.
So your answer is B because the voltage drop in each decreases when there are more bulbs.
The answer is B! Hope this helped
In which area or areas on the image does the salinity of the ocean increase?
A.
1
B.
2
C.
3
D.
1, 2, and 3
E.
none of these
Answer:
d
Explanation:
i took that test
In the area 1, 2, and 3 on the image does the salinity of the ocean increase. Option D is correct.
What is ocean sanity?Seawater is salty due to a variety of substances. The majority of them arrive via rivers, which bring chemicals dissolved from rock and soil. The most common is sodium chloride, also known as salt.
Salinity makes water colder and denser by lowering its temperature. The chilly water sinks to the ocean's depths. Slow currents carry it throughout the marine basins.
So the events that may occur when ocean salinity increases will be;
1)The mass of water increases.
2) Freezing point of water decreases.
3) buoyancy of objects in the water increases.
In the area 1, 2, and 3 on the image does the salinity of the ocean increase.
Hence, option D is correct.
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which has more inertia a 50kg object or a 10kg object
An example for curvilinear motion.
Ball thrown into the air at an angle.
Jin walked 4 km on a straight path to get to the sandwich shop. He traveled 30° south of east.
What is the southern component of Jin’s component, rounded to the nearest tenth?
Answer: -2 km
Explanation:
If we imagine Jin's movement to be the hypothenuse of a right triangle, then the southern component of Jin's movement corresponds to the side of the triangle opposite to the angle of 30 degrees. Therefore, the magnitude of this southern component is given by
However, the angle of 30 degrees is south of east: this means that the direction of this southern component is south, and since we generally take north as positive direction, we must add a negative sign, so the correct answer is
-2 km
Answer:
B
Explanation:
Edge 2021
In a circuit with one 12.0 resistor, a current of 0.500 A is flowing. This circuit is powered by a single
battery. What is the voltage of the battery?
Answer:
6 V
Explanation:
In a circuit, the relationship between voltage, current and resistance is given by Ohm's law:
[tex]V=RI[/tex]
where
V is the voltage
R is the resistance
I is the current
In this circuit, we have
[tex]R=12.0\Omega[/tex] is the resistance
I = 0.500 A
so we can find the voltage of the battery by using Ohm's law:
[tex]V=(12.0 \Omega)(0.500 A)=6 V[/tex]