Final answer:
To calculate the average velocity, which in this context is the average speed due to lack of a specified direction, divide the distance by the time. For your sister's trip, it would be 50 miles per hour.
Explanation:
Your older sister drove 500 miles to college in ten hours. To calculate her average velocity, you simply divide the total distance traveled by the time it took to travel that distance. Average velocity is a vector quantity, which means it includes both magnitude (how fast) and direction, however, if only the distance and time are known, and the direction is not specified, people often refer to the magnitude part of velocity simply as speed.
Formula to calculate average velocity (speed in this context) is:
Average Velocity = Total Distance Traveled / Total Time Taken
Plugging in the numbers:
Average Velocity = 500 miles / 10 hours = 50 miles per hour
So, her average speed would be 50 miles per hour.
Which changes in an electric motor will make the motor stronger? Check all that apply.
To strengthen an electric motor, increase the number of coils, enhance the magnetic field's strength, and optimize the commutation process.
Explanation:To make an electric motor stronger, several changes can be implemented. Increasing the number of coils in the motor will increase the torque, as the magnetic force exerted on each coil contributes to the overall twisting force on the motor's shaft. Enhancing the strength of the magnetic field within the motor, either by using stronger magnets or by increasing the current that produces the magnetic field, can also lead to a more powerful motor. Finally, ensuring the efficiency of the commutation process - the timing of the current's reversal to maintain continuous torque - is also crucial for motor strength. Factors such as the precise adjustment of commutators and brushes can minimize energy loss and improve performance.
Which formula represents Charles’s law? P1V1 = P2V2 V1T1 = V2T2
Charles's law formula describes a direct relationship between the volume and absolute temperature of a gas at constant pressure. The formula is V1/T1 = V2/T2. It explains why gas contracts or expands with temperature changes.
Explanation:The formula for Charles's law describes a direct relationship between the volume and absolute temperature (measured in Kelvin) of an ideal gas, provided the pressure remains constant. The formula is V1/T1 = V2/T2 where V1 and V2 are the initial and final volumes and T1 and T2 are the initial and final temperatures.
For example, if you have a gas in a balloon at room temperature (say, 300 Kelvin), and the balloon is inflated to a certain volume, if you then cool the gas to half the initial temperature (150 Kelvin), the volume of the gas (balloon) will also contract to half of its initial volume. This is the principle of Charles's law, showing a direct temperature-volume relationship in gases.
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Charles's Law is represented by the formula V₁/T₁ = V₂/T₂, which shows the relationship between the volume and temperature of a gas at constant pressure.
Charles's Law describes the relationship between the volume and temperature of a gas at constant pressure. According to this law, the volume of a gas is directly proportional to its temperature when pressure remains constant. When represented as mathematical formula the Charles's Law is:
V₁/T₁ = V₂/T₂
Here, V₁ and T₁ represent the initial volume and temperature of the gas, while V₂ and T₂ represent the final volume and temperature of the gas.
Complete Question
Which of the following formulas best describes Charles's law? V₁/T₁ = V₂/T₂ , P₁V₁ = P₂V₂ , P₁V₁/P₂V₂ , P₁/T₁ = P₂/T₂
Which statement is true? A) All waves travel at the same speed through any medium. B) All waves travel at the same speed if no medium is present. C) Electromagnetic waves require a medium, but mechanical waves do not. D) Mechanical waves require a medium, but electromagnetic waves do not. Eliminate
Which of the following are disadvantages of solar energy? Check all that apply. A. It contributes to global warming. B. It is expensive. C. It is not equally effective for all areas of the world. D. It is not effective at all times of day.
The headlights of a typical truck are powered by a 12 V battery. What current do they draw if the resistance is 4.8 ohms?
The headlights of a typical truck are powered by a 12 V battery, then the current they draw if the resistance is 4.8 ohms would be 2.5 Ampere.
What is resistance?Resistance is the obstruction of electrons in an electrically conducting material.
V=IR
As given in the problem, the headlights of a typical truck are powered by a 12 V battery, the find out the current drawn if the resistance is 4.8 ohms.
By using Ohm's Law,
The voltage of the battery = 12 volt
The resistance of the resistor = 4.8 Ohm
V = I × R
12 = I × 4.8
I = 12 / 4.8
I = 2.5 Ampere
Thus, If the headlights of a typical truck are powered by a 12 V battery, then the current they draw if the resistance is 4.8 ohms would be 2.5 Ampere.
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A man pulls on his dog's leash to keep him from running after a bicycle. Which term best describes this example? Select one: A. negative work B. positive work C. negative force D. positive force
Answer:negative work
Explanation:
This is right
Which of the following is an example of a safe laboratory produced?
A) eating or drinking from laboratory glasware
B) Tying back long hair and lose clothing
C) testing an odor by directly inhaling the vapor
D) touching hot objects with your bare hands
What endocrine disorder can be prevented by regular exercise?
Answer:
type 2 diabetes
Explanation:
edge unit test review
A forklift lifts 5 boxes from the ground to a height of 2 meters (m). The boxes push down with a force of 1000 newtons (N). How much work was done by the forklift to lift the boxes?
An electron with a kinetic energy of 3.90 ev collides with a sodium atom.
which of the following ideas provided an important step toward a more complete understanding of blackbody radiation?
Answer:
Light is composed of discrete chunks that must be absorbed as units
Explanation:
The air in a cool region underneath cloud cover will have _____ a region with no cloud cover.
Answer:
The air is a homogeneous mixture of gases that make up the Earth's atmosphere, which remain around the planet by the attraction force of gravity.
Its properties changes with the altitude, the pressure, the temperature and the density. For example, there is a relation that is inversely proportional between the temperature and the air density.
When the temperature decreases the density increases.
Therefore, the air in a cool region of the atmosphere will be denser than the air in a hot region of the atmosphere.
In other words:
The air in a cool region underneath cloud cover will have a higher density than a region with no cloud cover
What forms of energy are involved when snow on a mountain breaks loose, resulting in an avalanche?
During an avalanche, the ___energy of the snow on the mountain is converted into ___ energy as the snow cascades down.
Drop down one: Elastic
Kinetic
Potential
Radiant
Drop down two: Chemical
Kinetic
Nuclear
Potential
If energy is absorbed because chemical reaction is ______.
A. a product
B. limiting
C. exothermic
D. endothermic
I MARK BRAINLIEST, PLEASE HELP, THANKS IN ADVANCE! :))
The reaction is D. endothermic.
Explanation:Absorption or need of energy from surroundings is called endothermic process. Heat is the major common form of energy which is absorbed in this process. In this process, enthaply of reactant is less than the product.
For example, an ice cube placed in the hand for some time starts to melt and it takes energy in the form of heat from the hand. This process always requires energy because of the breaking of existing and formation of new chemical bonds.
When light waves strike a blue object, what happens to the light waves of all colors except blue?
Answer:
All colors are absorbed by the object except blue color.
Explanation:
When a white beam of light any object the light beam gets dispersed in its constituent colors. The object reflect a single color and absorb all remaining colors. So the object appears of the color which is reflected by object.
When the light beam strikes the blue object it gets dispersed in its constituent colors. All the colors are absorbed by the object except blue color. Blue color is reflected by the object.
Thus, the object appears of blue color.
photoelectric effect definition
50 POINTS!! I'M BEING TIMED, PLEASE HURRY!!
A box is sitting on the floor. It is then pulled with a force, Ft. The free-body diagram of the box is shown. Which describes the motion of the box? It is moving up with a net force of 20 N. It is moving to the right with a net force of 10 N. It is in dynamic equilibrium with a net force of 0 N. It is in static equilibrium with a net force of 0 N.
is it possibke to start with 25g of reactants and end with 35g of products?why or why not?
Ron hits his golf ball but is disappointed when it doesn't follow the course to the left. what does newton's first law of motion say about the travel of an object?
a.every action has an equal and opposite reaction applies.
b.inertia accelerates due to the unbalanced forces present.
c.an object at rest will move when external force is applied.
d.it will travel in a straight path unless changed by an external force. eliminate
Answer: the answer is D if you do t wanna read all that
Which of the following are more reactive than tin?
Check all that apply.
A. Gold
B. Calcium
C. Aluminum
D. Copper
pick more than one it multiple answer
B and C are right for apex!!
*a small object with a momentum of 6 kg∙m/s to the west approaches head-on a large object at rest. the small object bounces straight back with a momentum of 5 kg∙m/s. what is the change in the momentum of the small object? what is the impulse exerted on the small ball? what is the impulse exerted on the large object?
The impulse exerted on the large object will be [tex]J=11\ kg\frac{m}{s}[/tex]
what will be the impulse?1) The change in the momentum of the small object is given by the difference between its final momentum and its initial momentum:
[tex]\Delta p=(p_f-p_i)[/tex]
where [tex]p_f\ \ p_i[/tex] are the final and initial momentum of the small object. Substituting the numbers of the problem, we find
[tex]\Delta p=-5-6=-11\ \frac{kgm}{s}[/tex]
where we put a negative sign in front of pf because the direction of the object after the collision is opposed to its initial direction.
2) The impulse is equal to the product between the force applied to an object and the time interval:
[tex]J=F\times \Delta t[/tex] (1)
since the force is the product between the mass and the acceration: F=ma, and the acceleration is equal to the change in velocity divided by the time, we can rewrite (1) as
[tex]J=F\times \Delta t=ma\Delta t=mv\frac{\Delta t}{\Delta t}=mv=\Delta p[/tex]
So, the impulse is equal to the variation of momentum. Therefore, the impulse exerted on the small object is
[tex]J=\Delta p=-11\ \frac{kgm}{s}[/tex]
3) We have to find the final momentum of the large object. Initially, its momentum is zero, because it is at rest. Using the law of conservation of momentum,
[tex]p_i+0=p_f+P_f[/tex]
where are the final and initial momentum of the small object, while is the final momentum of the large object. By substituting the numbers we had before:
[tex]P_f=p_i-p_f=6-(-5)=11\ \frac{kgm}{s}[/tex]
So, the impulse exerted on the large object is equal to its variation of momentum:
[tex]\Delta p=P_f-p_i=11-0=11\ \frac{kgm}{s}[/tex]
Hence the impulse exerted on the large object will be [tex]J=11\ kg\frac{m}{s}[/tex]
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1.The question below refers to the following graph.
What is the approximate period of this wave?
15 centimeters
15 seconds
10 seconds
5 seconds
2. The question below refers to the following graph.
What is the wavelength of this wave?
10 cm
15 cm
60 cm
cannot be determined
3. The question below refers to the following graph.
What is the frequency of this wave?
1 wave/sec
10 waves/sec
0.1 wave/sec
cannot be determined
1. 10sec
2. Can not be determined
3. 0.1wave/sec
Answer :
(1) T = 10 seconds
(2) Wavelength cannot be determined.
(3) Frequency, [tex]\nu=0.1\ waves/sec[/tex]
Explanation :
(1) From the given graph :
Time period of the wave is defined as the time taken by it to complete one cycle.
So, the period of this wave is (C) " 10 seconds".
(2) The distance between two consecutive crest or the trough is called the wavelength of the wave.
From the graph it is clear that the distance between two consecutive crests is 10 cm(see attached figure).
So, the correct option is (a) "10 cm".
(3) As the time period of the wave is 10 seconds.
So, [tex]f=\dfrac{1}{T}[/tex]
[tex]f=\dfrac{1}{10\ s}\ waves/sec[/tex]
[tex]f=0.1\ waves/sec[/tex]
So, the correct option is (c) " 0.1 wave/sec ".
Briefly describe the three intelligences included in Robert Sternberg’s triarchic theory of human intelligence.
Answer:
Responses may vary but should include some or all of the following information: Sternberg’s theory of intelligence includes analytical, practical, and creative intelligence. Analytical intelligence is the type of intelligence used to problem solve. It involves abstract reasoning ability and evaluation skills. Practical intelligence is the type of intelligence that involves the ability to understand everyday tasks and how efficient one is in adapting to the surrounding environment. Creative intelligence is the type of intelligence that involves the ability to react to novel situations or stimuli.
Explanation:
hope this helped! ^-^
Robert Sternberg's triarchic theory includes analytical intelligence (problem-solving, analysis), creative intelligence (creating, imagining), and practical intelligence (application of knowledge in day-to-day situations).
Explanation:Robert Sternberg's triarchic theory of human intelligence consists of three types or categories: analytical intelligence, creative intelligence, and practical intelligence. Analytical intelligence relates to problem-solving and the analytical evaluation of information. For example, answering a multiple-choice quiz requires analytical intelligence. Creative intelligence involves creating, designing, imagining, or supposing. A student using creative intelligence might generate innovative ideas for a school project. Practical intelligence pertains to the application of intellectual skills in everyday contexts. One might use practical intelligence when navigating a social situation or solving real-world problems.
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Which of the following best describes acceleration
A. S/M
B. M/S
C. M2
D. M/S2
Two people are pushing on a desk to the right with a force 15n each what is the net force on the desk
Which of these is MOST LIKELY to cause natural pollution?
Answer:
volcano
Explanation:
the ash and stuff pollutes the air
A car travels straight for 20 miles on a road that is 30 degrees north of east what is the east component of the cars displacement to the nearest tenth of a mile
A motorboat approaches you head-on and sounds two shorts blasts. you would prefer to pass the boat on your port (left) side. which sound signal should you use to indicate your disagreement? eleven prolonged blasts
Explanation:
Sound signals used in waterways are a mode of communication with the other boaters to avoid any confusion and avoid collisions.
In order to show that we disagree with the other boater decision, the sound signal to blow is five or more short blast. This will give an impression to the other boater that I have not agreed with his decision.
The sound signal that I will give the other boater to inform him that I wish him to pass his boat on my left side is one short blast. This will tell him to pass on my left side.
The sound signal you should use to indicate you disagree with other boaters intentions is five or more short blasts
Five or more short blast shows a danger signal. They are signals used to indicate disagreement. They are one of the types of sound signals that show you are not in agreement with other boater’s intention.
Further ExplanationSound signals are also known as blasts. There are 2 common sound signals, short blast and prolonged blast. They are used when two vessels are heading towards each other.
Although these types of sound signals cannot be used in conditions that affect visibility such as fog.
However, there are different sound signals combinations and it is very important for all boaters to understand what each of the sound signals means.
The short blast is just 1 seconds while the prolonged blast lasts for duration of 4-6 seconds.
Sound signals can actually mean a change in direction to other boaters, it has different meanings.
One short blast indicate that you are informing other boaters you want to pass them from your port side (left-hand side), prolonged blasts means you are informing other boaters you want to pass them from starboard side (right-hand side) and three shorts blast means you are informing other boaters you are operating astern propulsion
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prolonged blastsound signalsshort blastboatersvesselsWhat are the starting materials for nuclear fission
A neutron and a large nucleus.
which of the following discoveries can be directly attributed to the use of imaging radar
Final answer:
Imaging radar has enabled the monitoring of flood extents, improved aircraft detection via Doppler technology, and contributed significantly to space exploration by mapping celestial bodies.
Explanation:
The use of imaging radar has led to several significant discoveries. One such discovery is the ability to monitor flood extents under any weather condition, as demonstrated by data from the European Resource Satellite (ERS-1), which clearly depicted the smooth surface of a flooded Mississippi River deflecting radio signals away while the surrounding rougher land reflected them. Additionally, the Doppler radar technology has enabled the differentiation of aircraft from ground echoes by leveraging the Doppler shift, significantly improving aerial detection systems. Beyond aviation and weather forecasting, radar has been instrumental in space exploration, determining distances to planets, rotation periods of Venus and Mercury, and mapping the terrain of various celestial bodies with high resolution.