Which waves are longitudinal waves? Check all that apply. sound waves ocean waves ultraviolet waves earthquake P-waves earthquake S-waves radio waves
Sound waves
Earthquake P-waves
Longitudinal waves?Longitudinal waves are waves in which the vibration of the medium is parallel to the direction the wave travels and displacement of the medium is in the same direction of the wave propagation.
Examples of longitudinal wavesSpeaking on the microphone. A sound wave is a significant example of a longitudinal wave. Clapping. Vibrating Drumheads. Tsunami Waves. Earthquake (Seismic-P wave) Vibration in Window Panels after a Thunder. Music Woofers.Read more about waves:
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What happend to the force of gravity between two subjects if the distance between them decreases?
A car moving at a speed of 8.0 meters per second enters a highway and accelerates at 3.0 meters per second^2. How fast will the car be moving after it has accelerated for 56 meters?
Answer:
Final speed of the car, v = 20 m/s
Explanation:
It is given that,
Initial speed of the car, u = 8 m/s
Acceleration of the car, [tex]a=3\ m/s^2[/tex]
Let v is the speed of the car after it has accelerated for 56 meters. It can be calculated suing the third equation of motion. It is given by :
[tex]v^2-u^2=2ad[/tex]
[tex]v^2=u^2+2ad[/tex]
[tex]v^2=(8)^2+2\times 3\times 56[/tex]
v = 20 m/s
So, the car is moving after it has accelerated for 56 meters is 20 m/s. Hence, this is the required solution.
Teams red and blue are having a tug-of-war. According to Newton's third law, the force with which the red team pulls on the blue team exactly equals the force with which the blue team pulls on the red team.How can one team ever win?
According to Newton's third law, the forces between the red and blue teams cancel each other out. However, the team that can exert a larger net force on the ground will be able to win the tug-of-war. Net force accounts for the forces between each team and the ground.
Explanation:According to Newton's third law of motion, the force with which the red team pulls on the blue team is exactly equal in magnitude and opposite in direction to the force with which the blue team pulls on the red team. So, it may seem like neither team can win because the forces cancel each other out. However, the key to understanding how one team can win lies in the concept of net force.
Net force is the vector sum of all the individual forces acting on an object. In the case of the tug-of-war, each team is exerting a force on the other, but they are also exerting a force on the ground. These ground forces are in opposite directions, but they are not equal in magnitude, as the ground provides more resistance to one team than the other.
Therefore, the team that can exert a larger net force on the ground will be able to accelerate in that direction and win the tug-of-war. It's not just about the forces between the teams, but also the forces between each team and the ground.
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Which theory of language development and acquisition includes the concepts of reinforcement, stimuli control, deprivation, and aversive stimulation?
a.skinner’s idea of language
b.jean piaget’s theory of cognitive development
c.chomsky’s nativist approach
d.bruner’s theory of language development
The answer is: a. Skinner’s idea of language
Skinner was a psychologists and one of the first behaviorists. In his language acquisition theory, he states that language acquisition is an environmental and social phenomenon; therefore, children acquire language through operant conditioning, which includes stimuli control, reinforcement (positive and aversive), and deprivation.
The correct answer is option A
The Skinner's idea of language was based on the behaviorist reinforcement principles which is associated with the words and the meaning.
The utterance of the words are reinforced on the child when he or she realizes the value of sentence formation, communication et cetera.
Example: if a child asks for milk and the mother smiles after the child asks for milk then the child will find his outcome with some rewards.
Candace is interested in learning more about colors. Which question about colors could be answered through scientific investigation? Which color bends the most to make a rainbow? What color of scented marker has the best smell? Which flower has the prettiest shade of purple on its petals? What is the best-looking color on a high-performance sports car?
A child is riding a bike and skids to a stop. what happens to their kinetic energy?
El thrust SSC es un vehiculo terrestre que en 1997 supero la velocidad del sonido.si logro recorrer 1366m en 4 s ¿cual fue su velocidad media en este intervalo?
Two airplanes leave an airport at the same time. The velocity of the first airplane is 650 m/h at a heading of 60.5 ◦ . The velocity of the second is 560 m/h at a heading of 85◦ . How far apart are they after 2.9 h? Answer in units of m.
The distance between two airplanes that have flown in different directions for a certain period of time can be calculated using the principles of relative velocity and the law of cosines in vector operations.
Explanation:This question involves concepts of relative velocity and vector operation in physics. To find how far apart the two airplanes are after 2.9 hours, we first need to calculate how far each plane has traveled in their separate directions. The distance traveled by each airplane is calculated using the formula distance = speed x time.
For the first plane, the distance is 650 m/h x 2.9 h = 1885 m; And for the second plane, it's 560 m/h x 2.9 h = 1624 m. However, they've traveled these distances at different directions (angles). Hence, we then have to calculate the resultant distance between these two paths, which is a task of vector analysis. We'll use the law of cosines because the heading direction forms an angle between two vectors.
Using the Law of Cosines, the resultant distance, d can be found with the formula [tex]d^2 = D1^2 + D2^2 - 2*D1*D2*[/tex]cos(Δθ), where D1 and D2 are the distances traveled by each plane, and Δθ is the difference in their heading angles (85°-60.5°). Putting the distances and the angle in the formula will then give us the resultant separation between the two planes after 2.9 hours.
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Which portrays inadequate data?
A.Geoff uses another classmate’s data because he forgot to record his own experiment’s temperature readings.
B.Shelby accidentally switches steps 3 and 4 while writing her laboratory procedure.
C.Rupal determines aluminum is the most reactive metal by completing only half of her experiment.
D.Juan records the density of acetone in grams per cubic liters instead of grams per milliliters.
Answer:
the answer is c
Explanation:
took the test
When you kick a soccer ball, you apply a force f1 to the ball. what force f2 does the soccer ball exert on your foot? 1. there is no force f2. 2. f1 = f2, acting in the same direction 3. f1 = f2, acting in opposite directions 4. f2 < f1 5. f1 < f2?
Rounded to the nearest whole number, what is the atomic mass of platinum
Determine which type of property each statement describes by typing “physical” or “chemical” in the blank. Hydrogen is a colorless, tasteless, and odorless gas. Hydrogen is very combustible in the presence of oxygen. Hydrogen is very reactive with most elements. Hydrogen is the least dense of all elements.
Answer:
Hydrogen is a colorless, tasteless, and odorless gas.
physical
Hydrogen is very combustible in the presence of oxygen.
chemical
Hydrogen is very reactive with most elements.
chemical
Hydrogen is the least dense of all elements.
physical
Explanation:
I put these in order
Hydrogen is a colorless, tasteless, and odorless gas.
⇒ physical
Hydrogen is very combustible in the presence of oxygen.
⇒ chemical
Hydrogen is very reactive with most elements.
⇒ chemical
Hydrogen is the least dense of all elements.
⇒ physical
Why does metal feel colder than cardboard? Enter in complete sentences
When h2o is removed from the mixture does the equilibrium shift to the right to the left or is there no shift?
1.Which of the following is an example of work?
A.Tim worked hard to carry a box of books across a room
B.A scientist works in the laboratory
C.Sam and Rachel worked hard to push the car but it did not move
D.Joann did work on a box when she pulled it across the floor
2.Joe carries his 5 kg cat 3 m horizontally across the living room. What is the net work done on the cat?
A. 0J
B. 15J
C. 150J
D. 180J
3.Which of the following is associated with an object in motion?
A.potential energy
B.nonmechanical energy
C.kinetic energy
D.elastic potential energy
4.Which of the following is associated with an object due to its position?
A.potential energy
B.positional energy
C.total energy
D.kinetic energy
5.What is kinetic energy of a 1000 kg truck moving at 32.0 m/s? *
A.1.2 x 10⁵ J
B.3.21 x 10⁵ J
C.5.12 x 10⁵ J
D.6.34 x 10⁵ J
Which of the following does notaccurately describe transistors?
A. Both NPN and PNP transistors consist of an emitter, base, and collector. B. Both NPN and PNP transistors consist of a base composed of an N-type material. C. Both NPN and PNP transistors consist of P-type and N-type material. D. Both NPN and PNP transistors operate in the same manner but with interchanged terminals and opposite directions of voltage and current.
The pitch of a sound wave is its _________.
A.speed B.amplitude C.frequency D.wavelength
w h a t i s h e a t ????
A rock is dropped at the same instant that a ball at the same height is thrown horizontally. which will will have the greater speed when it reaches the ground? ball rock both will reach at the same time impossible to answer
What type of radiation is given off in the nuclear reaction 210 84po → 206 82pb + ?
Alpha emission radiation is given off in the given nuclear reaction.
What is alpha emission radiation?
When the nucleus of an atom becomes unstable (the ratio of neutrons to protons is too low), alpha particles are released to bring the atom back into equilibrium.
Alpha decay occurs in high-atomic-number elements including uranium, radium, and thorium.
Alpha decay is a form of radioactive disintegration in which certain unstable atomic nuclei spontaneously release an alpha particle to expend excess energy.
Because alpha particles have two positive charges and a mass of four units, they form offspring nuclei with a positive nuclear charge or atomic number two units lower and a mass four units lower than their parents.
As a result, polonium-210 (mass number 210 and atomic number 84, i.e. a nucleus with 84 protons) decays to lead-206 by alpha emission (atomic number 82).
Hence alpha emission radiation is given off in the given nuclear reaction.
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A particular lever can lift a load with 80 percent efficiency. If 40 N of effort is applied 2.5 meters from the fulcrum, then what is the maximum load that can be lifted 1.5 m from the fulcrum?
A) 5333 N
B) 1920 N
C) 66.7 N
D) 53.3 N
Final answer:
To find the maximum load a lever can lift given its efficiency and distances from the fulcrum, calculate the mechanical advantage, then adjust for efficiency. The maximum load with 80 percent efficiency is 53.3 N, answer D.
Explanation:
The question is about calculating the maximum load that a lever can lift, given its efficiency, the effort applied, and the distances from the fulcrum on both the effort and the resistance arms. To solve this problem, we use the concept of mechanical advantage (MA) and take into account the efficiency of the lever.
The mechanical advantage (MA) of a lever is the ratio of the effort arm length to the resistance arm length. Therefore, MA = Effort Arm / Resistance Arm. In this case, MA = 2.5m / 1.5m = 1.6667.
Since the lever is at 80 percent efficiency, the actual maximum load will be less than the theoretical maximum load. If the effort is 40 N, then theoretically, the lever could lift a load of MA × Effort = 1.6667 × 40 N = 66.667 N. Considering the 80 percent efficiency, the actual maximum load that can be lifted is 0.8 × 66.667 = 53.3 N. Therefore, the correct answer is D. 53.3 N.
While hiking in the mountains, tanya observed a narrow and steep valley with a stream at the bottom of it. what most likely caused the valley to first form?
Final answer:
The narrow and steep valley with a stream at the bottom that Tanya observed was most likely formed primarily by tectonic activity, with subsequent shaping by erosion from streams and other processes such as wind and landslides.
Explanation:
Tanya most likely observed a valley that formed through tectonic activity, where over time, crustal tensions created narrow and steep valleys. These cracks may then have been further shaped by erosion from streams at the bottom, along with other processes such as wind and landslides. Such valleys are often further deepened and widened as water continues to erode the valley floor and sides. In some cases, valleys like this can also be created or shaped by the movement of glaciers, which carve out the terrain beneath them. However, the presence of the stream at the bottom of the valley Tanya observed suggests that water played a significant role in its formation.
pete is driving down 7th street. He drives 150 meters in 18 seconds . Assuming he does not speed up or down, what is his speed in meters per second ?
What is the rate at which energy is transformed
The rate at which energy is transformed is called power, which is measured in watts. One watt equals one joule of energy transferred per second. This concept is important in understanding energy use and efficiency.
Explanation:The rate at which energy is transformed or transferred is called power. Power is measured in watts (W) in the International System of Units (SI). One watt is equal to one joule of energy transformed per second.
For example, if a light bulb transforms 60 joules of electrical energy into light and heat energy every second, we would say that the power of the light bulb is 60 watts.
By understanding the rate of energy transformation, we can calculate how much energy a device uses over a given period of time, which is useful for things like understanding electricity bills or determining the efficiency of different appliances.
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How long does it take Anya to cover the distance of 5 miles if Ilya and Anya each can run at a speed of 8.70 mph and walk at a speed of 3.30 mph. They set off together on a route of length 5 miles. Anya walks half of the distance and runs the other half. Ilya Walks half of the time and runs the other half.
What is the relationship between force and potential energy?
Final answer:
The relationship between force and potential energy is that potential energy is defined within a conservative field based on the position, and force is the negative gradient of the potential energy. It is exemplified in gravitational and electric potential energies, with voltage used as a practical measure for electric potential energy.
Explanation:
Relationship Between Force and Potential Energy
The relationship between force and potential energy is intrinsic and significant in physics. When a force is conservative, which means it allows the energy to be conserved within a system, a potential energy can be defined and associated with that force. This potential energy is dependent only on the position within a conservative field, making it an efficient way to discuss energy changes without having to deal with the force that caused these changes directly. The connection is mathematically represented by the force being equal to the negative gradient of the potential energy.
The most common examples of this relationship are seen in gravitational potential energy and electric potential energy. Gravitational potential energy is the work done by gravitational force on an object due to its position relative to a larger mass, like Earth. Analogously, electric potential energy is work done by electric forces within an electric field, and is often referred to through the concept of voltage, which simplifies electrical interactions by focusing on energy per charge instead of the actual interaction forces.
Understanding potential energy and its relation to force, especially in conservative fields, deepens our comprehension of energy transformations. For example, when we lift a rock off the ground, we are increasing its gravitational potential energy by doing work against gravitational forces. If the rock is dropped, this potential energy transforms into kinetic energy as the force of gravity acts on the rock, accelerating it downwards.
What is the answer to some ancient civilizations used units of measure based on the length of certain seeds. What kinds of problems might you expect with such a system?
A volleyball player’s hand applies a 39 N force while in contact with a volleyball for 2 seconds. What is the impulse on the ball?
Answer:
78 N - S
Explanation:
It is correct
A 6.0 kg bucket of water is raised from a well by a rope. if the upward acceleration of the bucket is 3.9 m/s2, find the force exerted by the rope on the bucket