Final answer:
The necessary condition for conservation of momentum is the absence of net external forces on the system, making it closed or isolated. In this state, the total momentum remains constant, which is fundamental in solving physics problems related to the motion of objects.
Explanation:
The necessary condition for the conservation of momentum is that there should be no net external force acting on the system. In physics, this is known as an isolated system or a closed system. When analyzing problems using the conservation of momentum principle, it is crucial to identify whether the system in question meets this condition. In such a system, the vector sum of all the momenta remains constant. This is because, according to Newton's Second Law, when there is no net external force, there would be no change in the momentum of the system. Even in the presence of internal forces, like during a collision between particles, as long as the net external force is zero, the total momentum before and after an event remains the same.
To apply the conservation of momentum, the first step always involves confirming that you're dealing with a closed system with no net external force. This means even with forces like friction or air resistance, if they are considered external, they must be negligible or balanced out by other forces to maintain conservation of momentum.
The electron configuration of an element is 1s22s22p63s23p64s1. Why is this a REPRESENTATIVE element?
Answer:
D) The highest s-orbital or p-orbital is partially filled.
Explanation:
The element with electronic configuration The electronic configuration of an element is 1s22s22p63s23p64s1 has a partially filled s-orbital. This is typical of a representative element. In a representative element the highest s-orbital or p-orbital is partially filled.
Why is pluto not a planet?
Pluto is not a planet because it's a dwarf planet it's to small to be a planet.
Hopefully this helped =)!
Use your data (attachment) from Part 3 and Newton’s laws to explain why the force meter measures a force if the cart is moving at a constant velocity. You should cover the following points. State Newton’s first law.
• Identify the forces acting on the cart.
• Describe the relationships between applied force and mass and between applied force and weight as linear (from data or mathematical derivation by applying Newton’s first law).
• Explain why the data are linear in terms of Newton’s first law.
• Graph F versus mass + cart.
does centripetal force change in uniform circular motion?
The centripetal force in uniform circular motion remains constant as long as the object's mass and velocity don't change, since centripetal force is calculated as the mass times centripetal acceleration (Fc = mac).
In uniform circular motion, the centripetal force must remain constant to maintain the motion. The second law of motion given by Newton states that net force is mass times acceleration: net F = ma. We have centripetal acceleration (a = ac) for uniform circular motion, and consequently, Fc, the magnitude of centripetal force is Fc = mac. This equation implies that as long as the mass of the object and its velocity (which together determine ac) remain constant, the centripetal force will also remain constant. It is this force that maintains the object in a circular path, acting towards the center of curvature and altering the direction of the object without changing its speed.
It's important to note that centripetal force is not a particular type of force; rather, it could be provided by any force or combination of forces that act towards the center of the object's circular path, like gravitational force, tension, friction, or any other appropriate force that can cause the required centripetal acceleration for uniform circular motion.
Calculate the time in which a tuning fork of frequency 256 Kz. completes 32 vibrations?Answer needed urgently. Pl. help. Thanks ! ...?
The height, h, of a falling object t seconds after it is dropped from a platform 300 feet above the ground is modeled by the function h(t)=300-16t^2 Which expression could be used to determine the average rate at which the object falls during the first 3 seconds of its fall?
A.) h(3) – h(0)
B.) h(3/3)-h(0/3)
C.) h(3)/3
D.) (h(3)-h(0))/3
The average rate at which the object falls during the first 3 seconds of its fall is [tex]\frac{h(3) - h(0)}{3}[/tex].
Model of the object's motionThe function of the object's motion is given as h(t) = 300 - 16t².
Velocity of the object after 3 secondsThe velocity at which the object falls during the first 3 seconds of its fall is calculated as follows;
[tex]v = \frac{dh(t)}{dt} = -32t[/tex]
Average rateThe average rate of the motion is calculated as follows;
[tex]v = \frac{h(3) - h(0)}{3}[/tex]
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Answer:
D
Explanation:
A hollow cylinder of mass M and radius R rolls down an inclined plane. a block of mass M slides down an identical inclined plane. if both objects are released at the same time,
a) the cylinder will reach bottom first
b)the block will reach the bottom first
c) the block will reach the bottom with greater kinetic energy
d) the cylinder will reach bottom with greater kinetic energy
e) the block and the cylinder will reach the bottom at the same time. ...?
Because of friction,
A.energy is not always conserved
B.NOT all potential energy is converted to kinetic energy
C.all of an object's kinetic energy turns into potential energy
D.all of an object's potential energy turns into kinetic energy
A doctor estimates that a particular patient is losing bone density at a rate of 3% annually. The patient currently has a bone density of 1,500 kg/mg3. The doctor writes an exponential function to represent the situation. Which values should the doctor use for a and b in a function written in the form f(x) = abx, where f(x) represents the bone density after x years?
a =
b =
a will be the initial amount so:
a = 1,500 kg/m³
b will be decrease factor so:
1 - 3%
b = 0.97
To calculate the wavelength of a wave, take the wave speed and divide by the frequency of the wave. true or false
If a 60-watt bulb is used to light a room, how much current is flowing through the bulb given that the voltage is 120 volts?
The current flowing through a 60-watt bulb with a voltage supply of 120 volts is calculated using the equation I = P/V, which yields a result of 0.5 amperes.
To calculate the current flowing through a 60-watt bulb given a voltage of 120 volts, we can use Ohm's Law and the power equation. The power equation is P = IV, where P is power in watts, I is current in amperes, and V is voltage in volts.
First, we need to rearrange the equation to solve for the current I. Doing so, we get I = P/V. By substituting the given values, we have I = 60 W / 120 V. Therefore, I = 0.5 A.
The result shows that a current of 0.5 amperes (0.5 A) is flowing through the 60-watt bulb when it is connected to a 120-volt power supply.
Which of these is a source of voltage?
a. a battery
b. a generator
c. an electrical outlet
d. all of these are voltage sources.
what force is needed to give a 0.25-kg arrow an acceleration of 196 m/s^2A. 0.25 NB. 49 NC. 748 ND. 196 N
F = 49N
I Took The Test!
The electromagnet in a galavanometer.
a. increases the voltage in a circuit.
b. moves a pointer along a numbered scale in response to a current.
c. induces an electric current.
d. increases the current in a circuit.
If a loaded truck that can accelerate at 2 m/s2 loses its load and has one-third of its original mass, what acceleration can it attain if the same driving force acts on it?
Answer:
a₂ = 6 m/s²
Explanation:
Conceptual Analysis
We apply Newton's second law:
F=m*a Formula (1)
m: mass in kilograms (kg)
a: acceleration (m/s²)
F: force in Newtons (N)
Known Data
a₁ = 2 m/s²
m₁= m
m₂= (1/3)m
Problem development
We apply formula (1) for the two conditions given:
F₁ = m₁*a₁ = m*2
F₂ = m₂*a₂= (1/3)m*a₂
F₁ = F₂
m*2 = (1/3)m*a₂ We divide by m on both sides of the equation
2 = (1/3)*a₂
6 = a₂
a₂ = 6 m/s²
Crystals can have _____ bonds between their atoms.
ionic
covalent
metallic
all types of
All types of
Crystals can have all types of bonds between their atoms.
Explanation;Crystals are solid materials which contains atoms, molecules or ions that are arranged in a complex structure forming a crystal lattice.Crystals may have all types of bonds, these includes; ionic bonds, formed as a result of transfer between a metallic bond and a non-metal atom, Covalent bond, formed as a result of sharing electrons between non metal atoms, hydrogen bonds, metallic bonds Van der Waals bonds, etc.what is the energy of 1 mole of light that has wavelength 400nm? ...?
If a constant force acts on two objects of different masses, which object will accelerate more?
a. the larger object
c. both objects will respond in the same way
b. the smaller object
d. the larger object will speed up, but the smaller object will slow down
Answer:
b. the smaller object
Explanation:
According to Newton's second law, when a force is applied to an object, it accelerates. This acceleration is proportional to the intensity of the applied force and is inversely proportional to the mass that moves. Therefore, the lower the mass, the greater the acceleration.
an object is in circular motion. how will the object behave if the centripetal force is removed?
a . it would move in a line away from the circle
B. it would move in a line toward the circles center
C. it would move in a curbed , circular path
B. it would move in a line tangent to the circular path
The correct answer is
B. it would move in a line tangent to the circular path
In fact, the centripetal force is the only force that keeps the object in a circular trajectory, pulling the object towards the centre of the circle. When this force is removed, there are no other forces acting on the object, therefore for the law of inertia, the object will continue to move at constant velocity, therefore in the same direction (tangent to the circular path) at constant speed.
It is important to maintain septic systems in order to
what is interfacial polarisation ...?
A particular frost-free refrigerator uses about 710kWh of electrical energy per year. Express this amount of energy in J, kJ, & Cal.
Final answer:
To convert the energy usage of a refrigerator from kWh to J, kJ, and Cal, we multiply by appropriate conversion factors. The refrigerator uses 2.556 × 10^9 J, 2.556 × 10^6 kJ, and approximately 610,868 Cal per year. At an electricity cost of $0.15 per kWh, it costs $106.50 per year to run.
Explanation:
To answer the question on how to convert the annual energy usage of a frost-free refrigerator from kilowatt-hours (kWh) to Joules (J), kilojoules (kJ), and Calories (Cal), we can use the following conversion factors:
1 kWh = 3.6 × 10^6 J (Joules)
1 J = 0.001 kJ (kilojoules)
1 Cal = 4.184 kJ (the food Calorie, with a capital 'C', is equivalent to a kilocalorie)
Now, we will convert the 710 kWh/year:
To Joules: 710 kWh × 3.6 × 10^6 J/kWh = 2.556 × 10^9 J
To kilojoules: 2.556 × 10^9 J × 1 kJ/1000 J = 2.556 × 10^6 kJ
To Calories: Using the relationship between kJ and Cal: 2.556 × 10^6 kJ / (4.184 kJ/Cal) ≈ 610,868 Cal
The cost to run such a refrigerator at a typical electricity cost of $0.15 per kWh can be calculated as follows:
Annual Cost = 710 kWh/year × $0.15/kWh = $106.50/year
When gases, liquids, or solids are in contact with a moving object, the flow of _____ occurs due to frictional forces
When gases, liquids, or solids are in contact with a moving object, the flow of _____ occurs due to frictional forces.
The answer is HEAT
This is becuase when objects flow against friction energy is rubbed with friction causing surfaces to heat from the molecules rubbing.
A laser produces 20.0 mW of red light. In 1 hour, the laser emits 2.29 X 10^20 photons. What is the wavelength of the laser?
Using the scientific definition of work, does a greater amount of force always result in a greater amount of work? Why or why not? ...?
Using the scientific definition of work, a greater amount of force does not always result in a greater amount of work because work done is the result of the force applied and the displacement of that object.
What is the significance of the work done?The work done on an object when the object shows the displacement with respect to the force applied to it and If the force is applied in the same direction as the displacement, work is done on the object, and the work done is equal to the force multiplied by the displacement. The greater force does not show the greater amount of work, as the work done has different factors that it depends upon.
Hence, using the scientific definition of work, a greater amount of force does not always result in a greater amount of work because work done is the result of the force applied and the displacement of that object.
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describe an example of how non visible radiation can be used
Non-visible radiation is used in medical imaging, such as X-rays and ultrasound, in sterilization and disinfection with UV light, and in commercial applications like detecting metal flaws and preserving food.
Example of Non-Visible Radiation Used in Medical Imaging:
Medical imaging is a major application of non-visible radiation that does not rely on radioisotopes. An example of this is the use of X-ray imaging to view the internal structure of the body, which utilizes X-rays, a form of electromagnetic radiation outside the visible spectrum, to create images of bones and organs. Ultrasound, another non-visible form of radiation, uses high-frequency sound waves to produce images of soft tissues, such as inside a pregnant woman's womb to monitor the developing fetus.
Non-Visible Radiation in Sterilization and Disinfection:
Another use of non-visible radiation is in the field of sterilization and disinfection. Ultraviolet (UV) light is effective at killing microorganisms by causing damage to their DNA. This type of nonionizing radiation is less energetic than ionizing radiation and can be used to sterilize surgical instruments and disinfect water without penetrating the material of the packaging or damaging the cells of human tissue.
Non-Visible Radiation for Pest Control and Food Preservation:
Non-visible radiation is also used commercially, such as using gamma rays from cobalt-60 to detect flaws in metals and to sterilize male flies for pest control. In food preservation, non-visible radiation is applied to kill microorganisms that can spoil food, thus extending its shelf life and reducing the risk of foodborne illnesses without the use of chemical preservatives.
ATP molecules store cellular energy. When phosphate groups are removed and molecules of ADP are formed, energy is released. This energy can be used to perform
...?
The energy released from ATP molecules breaking down into ADP is used for various cellular functions like muscle contraction, transportation of substances, synthesis of biological molecules, and maintaining body temperature.
Explanation:When ATP molecules break down into ADP (adenosine diphosphate), the process releases energy. This energy finds use in various cellular functions, including muscle contraction, active transport of substances across cell membranes, synthesis of biological molecules, and maintaining body temperature. Essentially, an ATP molecule releases energy when it loses a phosphate group, and this energy powers biological processes requiring energy inside a cell.
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ATP molecules store energy that is released when converted to ADP and is used to perform cellular work. This energy is essential for processes such as muscle contraction and active transport in cells. The correct answer is D. cellular work.
ATP molecules play a crucial role in storing and providing energy for cellular work.
When ATP is broken down into ADP and an inorganic phosphate, energy is released and can be used for various cellular processes. This energy release is critical for activities like muscle contraction, active transport in cell membranes, and chemical reactions within the cell.For example, in muscle cells, the energy from ATP is used to move contractile proteins that enable muscle contraction. In cellular transport, ATP is vital for the function of the sodium-potassium pump, which maintains the cell's electrochemical gradient by actively transporting ions against their gradients.Correct answer is D. cellular work.
complete question:
ATP molecules store cellular energy. When phosphate groups are removed and molecules of ADP are formed energy is released. This energy can be used to perform?
A. osmosis
B. electron transport
C. diffusion
D. cellular work
The distance "d" you bike varies directly with the amount of time "t" you bike. Suppose you bike 13.2 miles in 1.25 hours. What is an equation that relates "d" and "t"? What is the graph of the equation? ...?
The equation relating distance "d" and time "t" is d = 10.56t. This equation represents a direct variation between distance and time, where 10.56 is the constant of variation. The graph of this equation is a straight line passing through points (0,0) and (1.25, 13.2).
Explanation:The distance "d" you bike varying directly with the amount of time "t" you bike suggests a linear relationship. This can be represented as d = kt, where "k" is the constant of variation, representing the rate you bike per hour. From the provided information, we know that if you bike for 1.25 hours, you travel 13.2 miles. That means k = d/t = 13.2 / 1.25 , which equals 10.56. So the equation relating "d" and "t" is d = 10.56t.
To graph this equation, you would plot time on the x-axis and distance on the y-axis. Begin by plotting a point at (0,0). Then plot a second point at (1.25, 13.2) as given. Draw a line through these points. The slope of this line is 10.56, which verifies our equation. This:
Displays direct variationShows distance traveled over timerepresents the equation d = 10.56tLearn more about Direct Variation here:https://brainly.com/question/9775007
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The electromagnetic waves that have the lowest frequency is called
A high school physics student is sitting in a seat reading this question. The magnitude of the force with which the seat is pushing up on the student to support him is closest to what?
Answer:
Force due to seat must be equal to the Weight of the student
Explanation:
As we know that the student is sitting on the seat at rest
So here we can say that at this position the student must be at equilibrium position
so we can write force equation for this position of student
vertically downward the net force is due to his/ her weight which is given as
[tex]W = mg[/tex]
now this weight of the student is counter balanced by the the normal force due to seat which is in opposite direction
Now for equilibrium position of the object we will have
[tex]F_n = mg[/tex]
so the seat will push the student upwards by force which is equal to the weight.