Answer:
the answer is B decreases
Explanation:
Sam boards a ski lift, and rides up the mountain at 6 miles per hour. once at the top, sam immediately begins skiing down the mountain, averaging 54 miles per hour, and does not stop until reaching the entrance to the lift. the whole trip, up and down, takes 40 minutes. assuming the trips up and down cover the same distance, how many miles long is the trip down the
ball A has a mass of 5.0 kg. ball B has twice the mass of ball A. The Two balls collide and stick together in a perfectly inelastic collision. after the collision the combined balls are at rest. if the velocity of ball A before the collision was 13 m/s, what was the velocity of ball B before the collision?
A. 6.5
B. -6.5 m/s
C. 26 m/s
D. -13 m/s
E. 0.0 m/s
Using the conservation of momentum principle, the initial velocity of ball B before the collision is calculated to be -6.5 m/s given that the collision is perfectly inelastic and both balls come to rest after they stick together.
The problem describes a perfectly inelastic collision situation where ball A, with a mass of 5.0 kg and an initial velocity of 13 m/s, collides with ball B, which has twice the mass of ball A, and they stick together and come to rest. To find the initial velocity of ball B before the collision, we can use the conservation of momentum principle. The total momentum before the collision must equal the total momentum after the collision.
Let's denote the mass of ball A as mA and the mass of ball B as mB. The initial velocity of ball A is vA1 = 13 m/s, and let's denote the initial velocity of ball B as vB1. The mass of ball B is twice that of ball A, so mB = 2mA. Since the balls are at rest after the collision, their combined momentum is zero.
The momentum conservation equation can be written as:
mAvA1 + mBvB1 = 0
Substituting the given values and solving for vB1 we get:
(5.0 kg)(13 m/s) + (2 × 5.0 kg)vB1 = 0
65 kg×m/s + 10.0 kgvB1 = 0
vB1 = -(65 kg×m/s) / (10.0 kg)
vB1 = -6.5 m/s
Therefore, the initial velocity of ball B before the collision was -6.5 m/s, which corresponds to option B.
What is an important trait or skill a scientist must have
Binary ionic compounds are: Check all that apply.
A.Compounds with very different electronegativities
B.Made from two metals
C.Compounds that share electrons
D.Metals and nonmetal ions
Compounds with very different electronegativities AND metals and non metals.
A body 'A' of mass 1.5kg travelling along the positive X-axis with speed of 4.5m/s collides with another body 'B' of mass 3.2kg, which initially is at rest as a result of the collision, 'A' is deflected and moves in a speed of 2.1m/s in a direction which is at an angle of 30 degree below the X-axis. 'B' is set in motion at an angle Φ above the X-axis. calculate the velocity of 'B' after the collision.
The 2779-m Brooklyn-Battery Tunnel, connecting Brooklyn and Manhattan, is one of the world's longest underwater vehicular tunnels. (a) Determine its fundamental frequency of vibration. (b) What harmonic must be excited so that it resonates in the audio region at 20 Hz or greater?
A bullet is fired at a speed of 2434 ft/s. what is this speed expressed in millimeters per minute?
What is the average speed of a human that runs a distance of 5 miles in 1 hour?
Which type of motor is shown below?
Answer: Option D, magnetic motor
Explanation: Plato/Edmentum
A magnetic motor has been shown in the picture.
What is a magnetic motor?A magnet motor, also known as a magnetic motor, is a form of perpetual motion device designed to produce rotation using permanent magnets in the stator and rotor without the use of external energy. Both conceptually and physically, such a motor is not feasible.
Numerous amateurs have championed the concept of working magnetic motors. It is conceivable that it is parascience. The term "free energy" is frequently used.Magnet motors should not be confused with permanent magnet motors, which are more frequently used and are powered by an external electrical energy source.Permanent magnets are used in both the stator and rotor of a hypothetical magnet motor. A circular movement of the rotor is allegedly kept going forever by a specific configuration of the attracting and repelling poles.To learn more about magnetic motors refer to:
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Please help!! will mark brainiest and 60 pnts!!!
1) An items real value is
A) Equal to its price
B) Always greater than its perceived value
C) Equal to the cost of its production
D) An average of the price of competitor items
2) Bartering is an example of the exchange process at work.
A) True
B) False
3) The core of marketing is
A) Real value
B) Perceived value
C) Utility
D) Social media
4) Colligate football merchandise associated with colleges in the SEC (South Eastern Conference) are more popular in Alabama than in Oregon because of their
A) Time utility
B) Place utility
C) Form utility
D) Image utility
5) A consumer who is willing to pay more for a pre-assembled piece of furniture as opposed to a cheaper piece of furniture that has to be put together after purchase recognizes the item’s
A) Real value
B) Perceived value
C) Form utility
D) Possession utility
6) By marketing an item, sellers attempt to increase the real value of an item.
A) True
B) False
7) In modern-day society, the exchange process is primarily based on which of the following?
A) The bartering system
B) The honor system
C) The monetary system
D) The gold standard
8) All companies with a website use this online venue to directly sell their products to consumers.
A) True
B) False
9) In today’s society, some services and commodities can be successfully promoted via Internet marketing alone.
A) True
B) False
10) In marketing, an item’s utility refers to only how that product is used by the consumer.
A) True
B) False
1) C 2) A 3) C 4) B 5) C 6) A 7) C 8) A 9) A 10) B Is the answer
Which arrow best represents the path of an object with projectile motion?
Answer:
C
Explanation:
Projectiles follow a parabolic path and I got it right on the quiz
Answer:
C
Explanation:
Which of the following utilize electromagnetic induction to operate?
generators in power plants
telephones
turbines
masonry
fireplaces
solar ovens
it multiple choose
The correct answer is option A and F, Generators in power plants and Solar ovens
Electromagnetic induction is the phenomena of generating electricity due to a changing magnetic field. In electric generators, a rotating coil (which acts as a conductor) is placed between the two magnets. As the coil rotates it induces electromotive force within the conductor. Like wise in case of solar oven , heating is caused due to the eddy currents produced with in the conductor placed with in a changing magnetic field.
Which Of The Following Are Part Of The Ten Essentials List?
A. Extra Clothes And Rain Gear
B. Umbrella
C. Sunscreen And Hat
D. First Aid Kit
E. Water Purifier
F. Sleeping Pad
the are A,C,D that is answer the don't forget to see more answer
A transverse wave on a rope is given by y(x,t)= (0.750cm)cos(π[(0.400cm−1)x+(250s−1)t]). part a part complete find the amplitude.
The amplitude of the given transverse wave in the rope is [tex]\boxed{0.750\,{\text{cm}}}[/tex].
Further Explanation:
The given expression of the wave developed in the rope is.
[tex]y\left( {x,t} \right) = \left( {0.750\,{\text{cm}}} \right)\cos \left( {\pi \left[ {\left( {0.400\,{\text{cm}} - {\text{1}}} \right)x + \left( {250\,{\text{s}} - 1} \right)t} \right]} \right)[/tex]
The standard equation of the wave produced in a rope is given as.
[tex]\boxed{y\left( {x,t} \right) = A\cos \left( {kx + \omega t} \right)}[/tex]
Here, [tex]y[/tex] is the position of the wave, [tex]A[/tex] is the amplitude of the wave, [tex]k[/tex] is the wave number and [tex]\omega[/tex] is the angular frequency of the wave.
On comparing the above equation of the wave with the standard equation of the wave produced in a rope, the amplitude of the wave can be obtained as follows.
[tex]A = 0.750\,{\text{cm}}[/tex]
Thus, the amplitude of the given transverse wave in the rope is [tex]\boxed{0.750\,{\text{cm}}}[/tex].
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Answer Details:
Grade: High School
Chapter: Waves
Subject: Physics
Keywords: Transverse, wave, amplitude, angular frequency, stationary wave, rope, velocity, position, wave number.
it takes 1.0h to drive 20km through a city during rush hour your (Blank) speed is 20km/h
Final answer:
The question involves calculating average speed by dividing distance traveled by time of travel. In the example, for a 20 km drive taking 1.0 hour, the average speed is 20 km/h. Another scenario provided explains how to convert average speed to different units given a trip from school to home.
Explanation:
The question asks about calculating average speed during a trip, which can be determined by dividing the total distance traveled by the total time of travel. In the given scenario, the student has a 1.0 hour trip to cover 20 km, which correctly yields an average speed of 20 km/h. To calculate average speed, you simply use the formula:
Average speed = Total distance / Total time
For a more detailed example, if you drive 10.0 km from your school to home in 20.0 minutes, it's necessary to convert minutes to hours by dividing by 60. You would then calculate the average speed in kilometers per hour (km/h) and convert the result to meters per second (m/s), if needed, using the appropriate conversion factors (1 km = 1000 m and 1 hr = 3600 seconds).
As a moon follows its orbit around a planet, the maximum grav- itational force exerted on the moon by the planet exceeds the minimum gravitational force by 11%. find the ratio rmax/rmin, where rmax is the moon's maximum distance from the center of the planet and rmin is the minimum distance.
Which of the following would most likely happen if water did not form hydrogen bonds? (2 points)
Answer:
Water would not expand when it freezes
Explanation:
______________ is a measure of the force of gravity pulling on an object of a given mass.
Describe the image of an object that is 38 cm from a concave mirror that has a focal length of 10 cm.
A concave mirror with a focal length of 10 cm will form a virtual, upright image that is 11.43 cm away from the mirror. The magnification of the image will be -0.301.
Explanation:A concave mirror with a focal length of 10 cm will form an image of an object that is 38 cm away. To determine the characteristics of the image, we can use the mirror equation: 1/f = 1/di + 1/do, where f is the focal length, di is the image distance, and do is the object distance. Rearranging the equation, we get di = 1 / (1/f - 1/do). Plugging in the given values, di = 1 / (1/10 - 1/38) = 11.43 cm.
The negative sign indicates that the image is virtual and upright. Furthermore, to determine the magnification of the image, we can use the formula: magnification = -di / do. Plugging in the values, magnification = -11.43 / 38 = -0.301.
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At the end of a factory production line, boxes start from rest and slide down a 30 ∘ ramp 5.8 m long. part a if the slide is to take no more than 3.9 s , what's the maximum allowed frictional coefficient
Select the correct answer. What is tan for the given triangle? 0.60 1.67 1.33 5.00 0.20
Because there is very little friction, the lever is an extremely efficient simple machine. using a 90.0% efficient lever, what input work is required to lift a(n) 19.0 kg mass through a distance of 45 cm? 3232 incorrect: your answer is incorrect. seenkey 93.2 j
Answer:
Input work: 93.2 J
Explanation:
The work efficiency formula is:
efficiency = output work/ input work
Solving for input work:
input work = output work/efficiency
The work required to lift an object is computed as follows:
Output work = mass * gravity * height
Using mass in kg, gravity in m/(s^2) and height in m; then work is expressed in Joules. Combining the equations and replacing with data, we get (units are omitted):
input work = 19*9.81*0.45/0.9 = 93.2 J
Note that 45 cm is equivalent to 0.45 m
every 24 hours, about how many hours are spent socializing and watching tv?
Answer:
16+ hours
Explanation:
because they have a job and jobs are long so they would take as much time as they can get
One student did an experiment with two unknown minerals, Mineral 1 and Mineral 2. The hardness scale shown below was used for the experiment.
Mineral Talc Gypsum Calcite Fluorite Apatite Orthoclase
Hardness 1 2 3 4 5 6
Any mineral on the hardness scale would scratch minerals below it on the scale. The student tested Mineral 1 and observed that it could scratch only two other minerals on the hardness scale. It was observed that Mineral 2 could scratch only four other minerals on the hardness scale. Which of these is a correct conclusion the student can make about Mineral 1 and Mineral 2?
A) Mineral 1 can be used to scratch talc and Mineral 2 can be used to scratch orthoclase.
B) Mineral 1 can be used to scratch orthoclase and Mineral 2 can be used to scratch talc.
C) Mineral 1 can be used to scratch calcite and Mineral 2 can be used to scratch gypsum.
D) Mineral 1 can be used to scratch gypsum and Mineral 2 can be used to scratch calcite.
Mineral 1 has a hardness equivalent to calcite, and Mineral 2 has a hardness equivalent to apatite. Therefore, Mineral 1 can scratch calcite and Mineral 2 can scratch gypsum.
Explanation:The hardness scale in the question list minerals according to their hardness. Mineral 1 could only scratch two other minerals, which means that it should rank third on the scale, since it can only scratch minerals 1 and 2. The hardness of Mineral 1 is, therefore, equivalent to that of calcite. Similarly, Mineral 2 could scratch four other minerals, and thus should rank fifth on the scale, after minerals 1, 2, 3, and 4. This means that the hardness of Mineral 2 is equivalent to that of apatite. Therefore, the correct answer is option C) Mineral 1 can be used to scratch calcite and Mineral 2 can be used to scratch gypsum.
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Compare the Carboniferous period to the Devonian period.
In geologic time, the Devonian Period is a period of the Paleozoic Era that follows the Silurian Period and precedes the Carboniferous Period, lasting between 419.2 million and 358.9 million years ago.
What is Devonian period?The Devonian, a Paleozoic era, is also known as the Age of Fishes because it produced a diverse range of fish.
The most fearsome were the armored placoderms, a group that first appeared during the Silurian period and had powerful jaws lined with bladelike plates that acted as teeth.
The Carboniferous period (about 360 million to 300 million years ago) was distinguished by dense and swampy forests that produced large deposits of peat.
Over time, peat bogs in Western Europe and North America transformed into rich coal reserves.
Thus, the above mentioned is the comparison between the two periods.
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A bird is flying with a speed of 18.0 m/s over water when it accidentally drops a 2.00 kg fish. If the altitude of the bird is 5.40 m and friction is disregarded, what is the mechanical energy of the system, and what is the speed of the fish when it hits the water?
(a) The mechanical energy of the system is 429.84 J.
(b) The speed of the fish when it hits the water is 20.73 m/s.
Given data:
The speed of flying bird is, v = 18.0 m/s.
The mass of fish is, m = 2.00 kg.
The altitude of bird is, h = 5.40 m.
(a)
Since the fish is carried by the bird initially. So, considering them as a part of single system. The mechanical energy (ME) of system is given as,
[tex]\rm ME = \rm kinetic\;\rm energy + \rm potential \;\rm energy\\ME = \dfrac{1}{2}mv^{2} + mgh\\\\ME = \dfrac{1}{2} \times 2.00 \times 18.0^{2} + (2.00 \times 9.8 \times 54.0)\\\\ME= 429.84 \;\rm J[/tex]
Thus, the mechanical energy of the system is 429.84 J.
(b)
When the fish is dropped to water at ground, then entire mechanical energy is converted into the kinetic energy (or potential energy becomes zero). So,
mechanical energy = kinetic energy
[tex]ME = \dfrac{1}{2}mv^{2}[/tex]
Here, v is the speed of fish, with which it hits the water.
Solving as,
[tex]429.84 = \dfrac{1}{2} \times 2.00\times v^{2}\\v=\sqrt{429.84} \\v = 20.73 \;\rm m/s[/tex]
Thus, the speed of the fish when it hits the water is 20.73 m/s.
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Animals, including humans, need shelter, food, water, air, and space in order to survive. How do animals satisfy their basic needs?
if you come from study island then its all of them
Food, shelter and clothes are basic need of the humans. Animals like tiger hunt the animals in the jungle, some animals leaves on green grass which are abundantly present in the jungle. for shelter they live in the group at suitable place.
What is Animal ?Animals belong to the biological kingdom Animalia and are multicellular, eukaryotic creatures. Animals generally ingest organic matter, breathe oxygen, can reproduce sexually, and form from a hollow ball of cells called a blastula during early development. There are an estimated 7.77 million animal species in existence as of 2022, but only 2.16 million of them have been described, including 1.05 million insects, over 36,000 fish, over 11,700 reptiles, over 11,100 birds, and 6,596 mammals. Animals can be as little as 8.5 micrometres (0.00033 in) or as large as 33.6 metres (110 ft). They construct extensive food webs through their complex interactions with one another and their surroundings. Zoology is the study of animals from a scientific perspective.
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Two mechanical waves intersect and produce the straight line seen here. What is the result of this intersection called?
A) summative interference
B) destructive interference
C) subtractive interference
D) constructive interference
Answer: The correct option is B.
Explanation:
In the given problem, two mechanical waves intersect and produce the straight line seen here. It means that the new wave having zero amplitude is formed.
Destructive interference is the interference of the wave in which the new wave will form with lower amplitude.
Constructive interference is the interference of the wave in which the new wave will form with lower amplitude.
Therefore, the correct answer is B.
Assume the second cart moves in the negative direction. two carts with masses of 4.6 kg and 3.3 kg move toward each other on a frictionless track with speeds of 5.1 m/s and 4.9 m/s, respectively. the carts stick together after colliding head-on. find their final speed. answer in units of m/s.
A long, straight, vertical wire carries a current upward. due east of this wire, in what direction does the magnetic field point? a long, straight, vertical wire carries a current upward. due east of this wire, in what direction does the magnetic field point? upward west north south downward east
The magnetic field is due east of a long, straight, vertical wire carrying a current upward points downward.
Explanation:The magnetic field created by a long, straight, vertical wire carrying a current upward can be determined using the right-hand rule. According to the right-hand rule, if you point your right thumb in the direction of the current in the wire, your fingers will curl in the direction of the magnetic field.
Since the wire is carrying current upward, the magnetic field will point in the clockwise direction when viewed from above. Therefore, the magnetic field due east of the wire will point downward.