Answer:
B
Explanation:
In a longitudinal wave, the places where particles of matter are closer together called
Final answer:
In a longitudinal wave, areas where particles are closer together are called compressions. The distance between two compressions or two rarefactions is the wavelength of the longitudinal wave, which characterizes sound waves among others.
Explanation:
In a longitudinal wave, the places where particles of matter are closer together are called compressions. Longitudinal waves consist of alternating areas of compressions and rarefactions. Compressions are regions of higher pressure, whereas rarefactions are areas of lower pressure. The wavelength of a longitudinal wave is the distance between two consecutive compressions or two consecutive rarefactions. Sound waves are a common example of longitudinal waves, where the vibration and movement of particles occur in the same direction as the propagation of the wave.
It's important to note that in a transverse wave, the oscillation of particles occurs perpendicular to the direction of the wave's travel. However, in longitudinal waves, such as sound waves, the particles move back and forth parallel to the direction of the wave, creating the compressions and rarefactions that characterize this type of wave.
When one object heats another, does the temperature increase of one object always equal the temperature decrease of the other object? Explain
Answer:
When one object heats another, the temperature increase of one object does not always equal the temperature decrease of the other object because one object has a higher specific heat than the other.
The temperature increase of one object does not necessarily equal the temperature decrease of the other during a heat transfer process. Factors such as the mass of the substance and certain physical properties related to its phase also influence the heat transferred. Heat transfer is guided by the law of conservation of energy, ensuring total energy remains constant.
Explanation:When two objects at different temperatures come into contact, heat flows from the hotter object to the colder one, a process known as heat transfer. However, the temperature increase of one object does not equal the temperature decrease of the other. This is due to the fact that the heat transferred to or from a substance depends not only on the difference in temperature, but also on the mass of the substance and certain physical properties related to the phase of the substance.
Let's consider two objects, object X with a temperature Tx and object Y with a temperature Ty. When X and Y come into contact, heat spontaneously flows from X (hotter object) to Y (colder object), resulting in a loss of thermal energy for X and a gain for Y. The final temperatures of X and Y will not be simply Tx - Ty, and Ty + Tx, they will depend on the specific heat capacities and masses of the objects (not included in the initial question).
This concept is deeply connected with the law of conservation of energy, which states that energy cannot be created or destroyed, but can only be transferred or transformed from one form to another. Consequently, the total energy of the system (both objects) remains constant during this process of heat transfer.
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7.
Which would take more force to stop in 10 seconds: an 8.0-kilogram ball rolling in a straight line at a speed
of 0.2 m/sec or a 4.0-kilogram ball rolling along the same path at a speed of 1.0 m/sec?
8.
The momentum of a car traveling in a straight line at 20 m/sec is 24,500 kg-m/sec. What is the car's mass?
9.
A 0.14-kilogram baseball is thrown in a straight line at a velocity of 30 m/sec. What is the momentum of the
baseball?
10. Another pitcher throws the same baseball in a straight line. Its momentum is 2.1 kg m/sec. What is the
velocity of the ball?
11. A 1-kilogram turtle crawls in a straight line at a speed of 0.01 m/sec. What is the turtle's momentum?
Plz help
Answer:
7. the ball with a mass of 8.0kg
8.1225 kg
9.4.2 kg-m/sec
10.15m/sec
11.0.001kgm/sec
Final answer:
The 4.0-kilogram ball requires more force to stop in 10 seconds. The car's mass is 1225 kg. The baseball's momentum is 4.2 kg-m/sec, and the turtle's momentum is 0.01 kg-m/sec.
Explanation:
To determine which ball requires more force to stop in 10 seconds, the momentum of each ball must be calculated. The force required to stop an object is related to the change in momentum and the time over which that change occurs (Force = change in momentum / time). The momentum of an object is the product of its mass and velocity (momentum = mass times velocity). So for the 8.0-kilogram ball, the momentum is 8.0 kg times 0.2 m/sec = 1.6 kg times m/sec. For the 4.0-kilogram ball, the momentum is 4.0 kg times 1.0 m/sec = 4.0 kg times m/sec. Therefore, the 4.0-kilogram ball would take more force to stop within the same time frame because it has a greater momentum.
The momentum of a car can be found by rearranging the momentum formula (momentum = mass times velocity) to solve for mass (mass = momentum / velocity). With a momentum of 24,500 kg times m/sec and a velocity of 20 m/sec, the car's mass is 24,500 kg times m/sec / 20 m/sec = 1225 kg.
To find the momentum of a baseball, multiply its mass by its velocity: 0.14 kg times 30 m/sec = 4.2 kg times m/sec.
The velocity of the baseball thrown by another pitcher can be found by dividing its momentum by its mass: 2.1 kg times m/sec / 0.14 kg = 15 m/sec.
The momentum of a turtle is the product of its mass and velocity: 1 kg times 0.01 m/sec = 0.01 kg times m/sec.
8. two +1 C charges are separated by 3000m. What is the magnitude of the electric force between them?
Answer:
1000 N
Explanation:
The magnitude of the electrostatic force between two charged object is given by
[tex]F=k\frac{q_1 q_2}{r^2}[/tex]
where
k is the Coulomb constant
q1, q2 is the magnitude of the two charges
r is the distance between the two objects
Moreover, the force is:
- Attractive if the two forces have opposite sign
- Repulsive if the two forces have same sign
In this problem:
[tex]q_1=q_2=+1C[/tex] are the two charges
r = 3000 m is their separation
Therefore, the electric force between the charges is:
[tex]F=(9\cdot 10^9)\frac{(1)(1)}{3000^2}=1000 N[/tex]
what is the role of gravity when it comes to changing the velocity of objects?
Gravity is the attraction of every body to every other body due to the masses of each body. The larger the mass, the greater the force. It also depends on the distances: the closer the bodies, the greater the force. Gravity is directed toward the center of a body, and the distance is measured from the center.
When objects fall to the ground, gravity causes them to accelerate. Acceleration is a change in velocity, and velocity, in turn, is a measure of the speed and direction of motion. Gravity causes an object to fall toward the ground at a faster and faster velocity the longer the object falls.
Convection occurs when thermal energy is transferred by the movement of
Answer:
Convection is the transfer of thermal energy from one place to another by the movement of gas or liquid particles. How does this happen? As a gas or liquid is heated, the substance expands. This is because the particles in liquids and gases gain kinetic energy when they are heated and start to move faster.
Answer:
fluids
Explanation:
on edg 2021
A block is sitting on a platform 20 m high. It weighs 50 kg. How much potential energy does it contain?
Answer:
9806.65 Joules
Explanation:
The block sitting on a platform contains 9,800 Joules of potential energy.
Given the following data:
Height = 20 metersMass of block = 50 kgWe know that acceleration due to gravity (a) for an object is equal to 9.8 meter per seconds square.
To find how much potential energy the block contains:
Mathematically, potential energy (P.E) is calculated by using the following formula:
[tex]P.E = mgh[/tex]
Where:
m is the mass of object. g is the acceleration due to gravity. h is the height of an object.Substituting the given parameters into the formula, we have;
[tex]P.E = 50[/tex] × [tex]9.8[/tex] × [tex]20[/tex]
Potential energy = 9,800 Joules
Therefore, the block contains 9,800 Joules of potential energy.
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If it takes 520 joules of work to move an object 10 meters, what force was needed? A. 51 N B. 510 N C. 530 N D. 52 N
Answer:
52
Explanation:
W = F x s
520 = F x 10
F = 520 ÷ 10
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What scientist worked with the laws of motion prior to newton
A) Kepler and Einstein
B) Galileo and Kepler
C) Galileo and Einstein
D) Aristotle and Socrates
Answer:
B)
Explanation:
Aside from his numerous inventions, Galileo also laid down the first accurate laws of motion for masses. Galileo measured that all bodies accelerate at the same rate regardless of their size or mass.
Answer:
Galileo and kepler
Explanation:
Aside from his numerous inventions, Galileo also laid down the first accurate laws of motion for masses. Galileo measured that all bodies accelerate at the same rate regardless of their size or mass.
a person run 21.0 km west then runs 10.0 km east what is the persons distance
Answer:
31.0 km
Explanation:
21.0+10.0=31.0 km
Answer:
Distance from starting point = 11 km, Distance ran altogether = 31 km
Explanation:
21 - 10 = 11
21 + 10 = 31
40. Determine the amount of time for polonium-210 to decay to one fourth its original quantity. The
half-life of polonium-210 is 138 days. Please show all work. (ref: p.808-813)
Answer:
276 days
Explanation:
in order to decay to half, it will be 138 days. in order to half that again down to a quarter, it will be another 138 days. 138+138 is 276, thus, 276 days.
Answer:
276 days
Explanation:
Mercury has two satellites. True False (I NEED THE ANSWER ASAP!
Answer:
False
Explanation:
Mercury has 0 natural satellites.
At sea level, liquid water changes into water vapor ata temperature of 100°C. However, at high altitudes, it changes at a
temperature of 95°C. This shows that phase changes of matter are affected not only by temperature but also by...
Precipitation
Coastal winds
Rocky terrain
Pressure
Answer:
Pressure
Explanation:
This is because Air Pressure decreases as we move upwards from the Surface of the Earth. It is as the Number of Air Molecules get reduced at Higher Altitude which in turn reduces Atmospheric Pressure.
Hope This Helps !
Answer: Pressure
Explanation:
If wind is slackening, which of the following statements is true?
It is not as windy now as it was a little while ago.
It is windier now than it was a little while ago.
The wind is now mixed with rain and sleet.
The wind is creating dangerous driving conditions.
Answer:
It is not as windy now as it was a little while ago
Slackening wind indicates that the wind speed or intensity is decreasing, meaning it is not as windy now as it was a little while ago.
Explanation:When we say that the wind is slackening, it means that the speed or force of the wind is decreasing or getting weaker. It suggests that it is not as windy now as it was a little while ago. A slackening wind does not necessarily mean that the wind is now mixed with rain and sleet, nor does it automatically mean that the wind is creating dangerous driving conditions. It solely relates to the intensity or force of the wind which is lowering.
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How are humans able to perceive light waves? Sound waves?
Answer:
Light that is visible to humans makes up only a small portion of the electromagnetic spectrum. In humans, light wavelength is associated with perception of color. The amplitude of light waves is associated with our experience of brightness or intensity of color, with larger amplitudes appearing brighter.
Explanation:
A 5 cm object is 6 cm from a convex lens, which has a focal length of 7 cm. What is the distance of the image from the lens
Answer: -42 cm
Explanation: It explains after you answer
Answer:
Distance=: -42 cm
Height: 35 cm
Explanation:
Tells you on edg
A charged particle (q = 8.0 mC), which moves in a region where the only force acting on the particle is an electric force, is released from rest at point A. At point B the kinetic energy of the particle is equal to 4.8 J. What is the electric potential difference VB VA?
The potential difference will be 600 V.
Explanation:
Here the charged particle is said to exhibit a charge of -8 mC. So when it moves from point A to point B, it gains a kinetic energy of 4.8 J. Also, the charged particle is said to exhibit an electrostatic potential energy at points A and B.
The particle will obey conservation of energy. So the sum of energy exhibited by the particle at point B will be equal to the sum of energy exhibited by the particle at point A.
At point A, the kinetic energy is zero and the electrostatic energy will be represented as U₁.
Then, the total energy at point A = U₁
Similarly, at point B, the charged particle will exhibit kinetic energy as well as electrostatic potential energy (U₂).
Total energy exhibited by the charged particles at point B = U₂ + K.E = U₂+4.8.
Then, as per law of conservation of energy:
[tex]U_{2} + 4.8 = U_{1} \\\\U_{1} -U_{2} = 4.8[/tex]
It is known that electrostatic potential energy is the product of charge with the potential at that point.
So, [tex]U_{1} = QV_{1}[/tex] and [tex]U_{2} = QV_{2}[/tex]
Then, [tex]Q (V_{1} - V_{2}) = 4.8\\ \\-8*10^{-3} (V_{1} - V_{2})=4.8\\\\(V_{1} - V_{2}) = \frac{4.8}{-8*10^{-3} } = -0.6*10^{3} = -600 V[/tex]
Then, V₂-V₁ will be 600 V.
Thus, the potential difference will be 600 V.
True or False? When vinegar is added to baking soda, the temperature decreases slightly. This is a sign that there was a chemical reaction.
Group of answer choices
True
False
Answer:
true
Explanation:
Answer:
this would be be true but of the ingredients in it.
What were the provisions of the 1973 Vietnam War cease-fire?
Check all of the boxes that apply.
The United States would return its prisoners of war.
The United States would allow South Vietnam to decide its own future.
Communist forces would return their prisoners of war.
The United States would keep troops in Vietnam.
Communist forces would not send more soldiers to South Vietnam,
Answer:
BCE
Explanation:
The provisions of the 1973 Vietnam War cease-fire are
The United States would allow South Vietnam to decide its own future.Communist forces would return their prisoners of war.Communist forces would not send more soldiers to South Vietnam.What is Vietnam located?Vietnam is a country located in the southeast Asian region on the Indochinese peninsula. It was under french colonial rule rule since 19th century.
Given are the provisions of the 1973 Vietnam War cease-fire.
The provisions of the 1973 Vietnam War cease-fire are
The United States would allow South Vietnam to decide its own future.Communist forces would return their prisoners of war.Communist forces would not send more soldiers to South Vietnam.Therefore, the provisions of the 1973 Vietnam War cease-fire are
The United States would allow South Vietnam to decide its own future.Communist forces would return their prisoners of war.Communist forces would not send more soldiers to South Vietnam.To solve more questions on Vietnamese war, visit the link below -
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3. The velocity of waves on a rope under a tension of 40 N is 10 m/s. If the tension is reduced
to 10 N, what will be the new speed of the wave?
HAI
Answer:
5 m/s
Explanation:
The speed of a wave in a string is related to the tension in the string by the equation
[tex]v=\sqrt{\frac{T}{\mu}}[/tex]
where
v is the speed of the wave
T is the tension in the string
[tex]\mu[/tex] is the linear density of the string
We can rewrite the equation as
[tex]\frac{\sqrt{T}}{v}=\sqrt{\mu}[/tex]
In this problem, the tension in the string is changed; however, its linear mass density remains constant. So we can write:
[tex]\frac{\sqrt{T_1}}{v_1}=\frac{\sqrt{T_2}}{v_2}[/tex]
where:
T1 = 40 N is the initial tension in the string
v1 = 10 m/s is the initial speed of the wave
T2 = 10 N is the final tension in the string
Solving for v2, we find the final speed of the wave:
[tex]v_2=v_1 \sqrt{\frac{T_2}{T_1}}=(10)\sqrt{\frac{10}{40}}=5 m/s[/tex]
Assume that you are performing general maintenance on your bicycle using a black lubricant. When you lubricate the brake levers, what type of
fingerprints are you most likely to leave on them?
When lubricating the brake levers of a bicycle with a black lubricant, you are most likely to leave dark or smudged fingerprints on them. The black lubricant can transfer onto your fingers and when you touch the brake levers, it can leave visible marks that correspond to your fingerprints.
Fingerprints are typically formed by the natural oils and sweat on our skin, and lubricants like oil or grease can actually mask or reduce the visibility of fingerprints.
Therefore, if you are using a black lubricant on the brake levers, you would not leave distinct fingerprints on them. Instead, you may leave smudges or marks from the lubricant itself, which can be visible on the surface of the levers.
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What charges must the particles have to create the electric field shown
Correct Option:
X shows positive while Y shows negative charges, create the electric field as shown.
Option: D
Explanation:
The idea of an electric field provides a way to define how starlight travels to enter our eyes across huge distances of empty space.The electric field is a quantity of vectors that is present at any point in space. The electric field at a region shows the force that, if put at that position, will operate upon a positive charge device.
The direction of the electric field points directly at a positive point charge, and straight at a negative point charge. The field direction is implemented to the force direction exert on a positive test charge. It is externally from a positive charge and radially in toward a negative point charge.
What are the products in the photosynthesis equation?
A) 02 and energy
B) CO2 and 02
C) Glucose and 02
D) 02 and sunlight
Answer:
C
Explanation:
what is amplitude? Explain in your own words.
Which of the following are created by an arrangement of electric charges or a
current (the flow of electric charges)?
A. A gravitational field
B. A magnetic field
c. A quantum field
O
D. An electric field
GHIDMAT
Final answer:
An arrangement of electric charges or a current creates both an electric field and a magnetic field. Mass generates a gravitational field, not related to charges or currents, and a quantum field is more broadly conceptual and not directly created by charges or currents. So the correct options are B and D.
Explanation:
The arrangement of electric charges or a current, which is the flow of electric charges, creates both an electric field and a magnetic field. Mass produces a gravitational field but is unrelated to electric charges or current. While a quantum field is a more comprehensive concept that includes various types of fields at the quantum level, it is not directly created by just the arrangement of electric charges or current alone.
Electric fields are created around objects that have a net electric charge, and these fields exert forces on other charged objects. On the other hand, magnetic fields are specifically generated by moving charges (current) or changing electric fields as per Ampere's Law and Maxwell's equations. This phenomenon underlies many technologies, including electric motors and magnetic imaging, by utilizing the interaction between current and the magnetic field it produces.
A cd player uses a ___ to convert info to an electrical signal
A. Neon light
B. Sodium vapor light
C. Laser
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A student is helping his mom make sweet tea. She wants the tea to be very sweet and very strong. The student knows how to alter solutes so that they will dissolve better and faster.
Which of the following conditions would help make the sweet tea faster?
I. using sugar cubes with less surface area
II. using granulated sugar with greater surface area
III. using hot water
IV. using cold water
V. allowing to sit
V1. stirring vigorously
A. I, III, and VI
B. I, III, and V
C. II, III, and VI
D. I, IV, and V
Answer:
C
Explanation:
Greater surface area will allow the sugar to dissolve faster. Stirring and hot water will also help dissolve the sugar faster.
Answer:
D
Explanation:
stirring temperature small particle size
What were the advantages of the Wechsler Intelligence Test compared to earlier tests?
A. Group of answer choices
B. The scores on subtests could help identify a learning problem that needed attention
C. Performance scores were less likely to be affect by cultural barriers
D. All three were advantages
Performance scores were less likely to be affected by language barriers
find the unit of length,mass and time if the unit of force, velocity and energy are respectively 100N,10ms^1and 500J
Answer:
Mass = 5 unit
Length = 5 unit
Time = 0.5 unit
Explanation:
As we know that the units are as following
Force = 100 N
Velocity = 10 m/s
Energy = 500 J
i) For mass we know that
[tex]Force = mass \times \frac{velocity}{time}[/tex]
[tex]100 = mass \times \frac{10}{0.5}[/tex]
[tex]mass = 5 units[/tex]
ii) For length we know that
[tex]Force \times distance = energy/work[/tex]
[tex]100 (d) = 500[/tex]
[tex]Length = 5 units[/tex]
iii) for Time we know that
[tex]Power = \frac{Energy}{time}[/tex]
[tex]Force \times velocity = \frac{Energy}{time}[/tex]
[tex]time = \frac{500}{100\times 10}[/tex]
[tex]Time = 0.5 unit[/tex]
A 2000 kg car has a speed of 23 mph at the top of a hill which is 144 m tall. How
fast will the car be going if it coasts to the bottom of the hill?
Answer:
Final speed, v = 54.64 m/s.
Explanation:
Given that,
Mass of a car, m = 2000 kg
Initial speed of the car, u = 23 mph = 10.28 m/s
height, h = 144 m
We need to find the speed of the car at the bottom of the hill. Let v is the speed. Applying conservation of energy as :
[tex]\dfrac{1}{2}mu^2+mgh=\dfrac{1}{2}mv^2\\\\v^2-u^2=2ah[/tex]
a = g here
[tex]v=\sqrt{2gh+u^2}\\\\v=\sqrt{2\times 10\times 144+(10.28)^2}\\\\v=54.64\ m/s[/tex]
So, the speed at the bottom of the hill is 54.64 m/s.
Using the principle of conservation of energy, the car will be going approximately 53.7 m/s when it reaches the bottom of the hill.
Explanation:The question basically involves the principle of conservation of energy. You need to equate the total energy at the top of the hill to the total energy at the bottom. The total energy at the top is the sum of kinetic and potential energies. The kinetic energy is 0.5* m * v^2, where m = 2000 kg (mass) and v = 23 mph = 10.3 m/s (velocity). The potential energy is m * g * h, where g = 9.8 m/s^2 (gravity) and h = 144 m (height). The total energy at the bottom is kinetic energy (since potential energy is 0), which is 0.5 * m * u^2 where u is the final velocity. Equating the energies and solving for u, we get u = sqrt(2*g*h + v^2) =~ 53.7 m/s.
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