If a 100N weight sits in an express elevator what will be the weight when the elevator is traveling at a constant speed
The weight of the 100N weight will remain the same when the elevator is travelling at a constant speed.
Explanation:When the elevator is travelling at a constant speed, the weight of the 100N weight will remain the same. The weight of an object is the force exerted on it due to gravity, and this force does not change regardless of the elevator's speed or direction. So, the weight of the object will still be 100N.
Red cabbage juice can be used as an acid-base indicator. When a solution is highly acidic, the juice turns red. As the acidity decreases and the solution becomes basic, the color changes from red to violet to green to yellow. Red cabbage juice is used as an indicator of some common household products. Which product will turn yellow when cabbage juice is added? A) coffee B) ammonia C) vinegar D) bottled water
Answer:
B) Ammonia
Explanation:
Red cabbage juice is an acid-base indicator. It turns red for acidic medium and as the pH increase it turns to violet, green and then yellow.
It means for a basic solution, it would turn yellow. From the given options, coffee and vinegar are acidic. Therefore, they would turn red. Bottled water is neutral. Ammonia is a weak base. It would the indicator yellow.
Which type of mirror causes light rays to refract away from each other?
Zero on the celsius scale is also known as absolute zero true or false
Zero on the Celsius scale is not known as absolute zero. - False
Explanation:Zero on the Celsius scale is not known as absolute zero. Absolute zero is the lowest temperature that can theoretically exist, and it is equal to -273.15 degrees Celsius or -459.67 degrees Fahrenheit. Zero degrees Celsius is simply the freezing point of water. At this point, all molecular motion and energy cease, and no heat remains in matter.
It is a fundamental concept in thermodynamics and the basis for the Kelvin temperature scale. Achieving absolute zero is impossible in practice, but scientists have come close, allowing the study of quantum phenomena and materials at extremely low temperatures, leading to breakthroughs in physics and technology.
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Find the total translational kinetic energy of 1.5 l of oxygen gas held at a temperature of 0°c and a pressure of 0.8 atm.
To calculate the total translational kinetic energy of 1.5 liters of oxygen gas at 0°C and 0.8 atm, use the ideal gas law to find the number of moles and then apply the translational kinetic energy equation (KEtrans = (3/2)nRT).
Explanation:To find the total translational kinetic energy (KEtrans) of 1.5 liters of oxygen gas at 0°C (273 K) and 0.8 atm, we can use the ideal gas law and the equipartition theorem. The ideal gas law PV = nRT can give us the number of moles of oxygen gas when rearranged to n = PV/RT. Here, P is the pressure, V is the volume, R is the ideal gas constant, and T is the temperature.
Once the moles (n) are calculated, the translational kinetic energy per mole of a gas can be found using the equation KEtrans = (3/2)nRT, where n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin. By substituting the values into the equation, we can find the total translational kinetic energy of the gas sample.
What causes the northern and southern halves of the planet to experience winter and summer at opposite times?
which statement best describes Gay-Lassac’s law
Gay-Lussac's law states that the pressure of a given amount of gas is directly proportional to its temperature on the Kelvin scale, provided the volume is constant. This was initially discovered by Guillaume Amontons and later refined by Joseph Louis Gay-Lussac. The mathematical representation is P proportional to T, P = constant × T or P = kx T.
Explanation:The best description of Gay-Lussac's law is that it states that the pressure of a given amount of gas is directly proportional to its temperature on the Kelvin scale when the volume is held constant. Guillaume Amontons was the first to empirically establish this relationship between pressure and temperature of a gas around 1700, and Joseph Louis Gay-Lussac defined the relationship more accurately around 1800. This relationship is expressed mathematically as PxT or P = constant × T or P = kx T.
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The slope of a Velocity versus Time graph will tell you the object’s what?
A) Acceleration
B) Change in position
C) Velocity
Thanks
To be topologically equivalent which deformation is not allowed
How does electromagnetic induction happen?
Which of the following best describes alternating current? current that increases and decreases in temperature current that constantly turns on and off current in which charges change direction current that gains and loses electrons
Answer: Charge that jiggles back and forth very quickly.
Explanation: Alternating current is an electric current that peroidically reverses direction .
A P E X
The following best describes alternating current, Charge that jiggles back and forth very quickly.
What increases or decreases alternating current?A transformer is a machine that either boosts or reduce the voltage of alternating current.
Step-up transformer rises the voltage of alternating current whereas step-down transformer reduces the voltage of alternating current.
Thus, Alternating current is an electric current that peroidically reverses direction.
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How far the Electromagnetics effects be found
((((Psychology))))According to Rubin, the desire to share your innermost thoughts and feelings is:
A. attachment.
B. caring.
C. intimacy.
D. all of the above.
Which is a narrow band of high winds located near the top of the troposphere? a sea breeze a jet stream polar easterly a trade wind?
Answer:
jet streams
Explanation:
I know the anwser
Determine the pressure exerted by 2.50 mol of gas in a 2.92 l container at 32 oc.
*PLEASE HELP WILL GIVE BRAINLIEST*
List the following events in the order that they happen as a sound wave is generated and transmitted through the air.
1. The object's energy transfers to the surrounding air particles.
2. Something causes an object to vibrate.
3. Vibrating air particles bump into other air particles.
4. Air particles around the object begin to vibrate.
5. Energy transfers outward from air particle to air particle.
Answer: The order is 2,1,5,4,3
Explanation: Hope This helps.
The order in which events occur in the generation and transmission of a sound wave begins with an object vibrating, which transfers energy to air particles, leading to the vibration of surrounding air and the eventual transfer of energy from particle to particle, forming a sound wave.
Sound is produced and travels through a medium via a series of events that can be listed in sequential order:
Something causes an object to vibrate.
The object's energy transfers to the surrounding air particles.
Air particles around the object begin to vibrate.
Vibrating air particles bump into other air particles.
Energy transfers outward from air particle to air particle.
For example, when a tuning fork is struck, its tines vibrate and cause air molecules nearby to oscillate. These vibrations propagate outward as successive air molecules collide, similar to ripples in water when a stone is thrown. This movement of air molecules forms a sound wave, which can be detected by the ear as changes in air pressure and interpreted as sound.
you stretch a spring by a distance of 0.3 m. the spring has a spring constant of 440 n/m. when you release the spring, it snaps back. what is the kinetic energy of the springs as it reaches its natural length?
Answer:
19.8 J
Explanation:
According to the law of conservation of energy, the total mechanical energy of the spring (sum of kinetic energy and elastic potential energy) must be conserved:
[tex]K_i + U_i = K_f + U_f[/tex] (1)
where we have
[tex]K_i[/tex] is the initial kinetic energy of the spring, which is zero because the spring starts from rest (2)
[tex]U_i[/tex] is the elastic potential energy of the spring when it is fully stretched
[tex]K_f[/tex] is the kinetic energy of the spring when it reaches the natural length
[tex]U_f[/tex] is the elastic potential energy of the spring when it reaches its natural length, which is zero because the stretch in this case is zero (3)
So
[tex]U_i = \frac{1}{2}k(\Delta x_i)^2[/tex]
where
k = 440 N/m is the spring constant
[tex]\Delta x_i = 0.3 m[/tex] is the initial stretching of the spring
Substituting,
[tex]U_i = \frac{1}{2}(440)(0.3)^2=19.8 J[/tex]
And so using eq.(1) and keeping in mind (2) and (3) we find
[tex]K_f= U_i = 19.8 J[/tex]
When the amount of a radioactive substance is reduced by 50%, what has occurred? a half-life beta radiation alpha radiation gamma radiation?
A radioactive material is the heavy nucleus material. When the amount of a radioactive substance is reduced by 50%, a half life has occurred.
What is half life?In radioactivity, the time interval required for one-half of the atomic nuclei of a radioactive sample to decay .
The time interval required for the number of disintegrations per second of a radioactive material or 50% decomposed is equal to the half life of that material.
Thus, when the amount of a radioactive substance is reduced by 50%, a half life has occurred.
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Put these events of a chain reaction in order from first to last. Many atoms fission. Neutrons are produced. An atom fissions. Neutrons find other atoms.
A force of 50 pounds is directed 30 from the horizontal, find the vector that represents this force.
What aspects of bone’s structure make it stronger than concrete? think about the engineering design of bone. use the terms tensile strength and compressional strength in your answer?
Bone's structure is optimized for strength due to its complex arrangement of organic and inorganic materials.
Tensile strength is a key factor: collagen fibres in bone resist pulling forces, making it flexible yet tough.
Compressional strength is achieved through the dense arrangement of mineralized hydroxyapatite crystals, providing resistance against crushing loads.
This combination of tensile and compressional strength allows bone to withstand bending, twisting, and impact. In contrast, concrete primarily relies on compressional strength, making it brittle and prone to fracture under tension.
Bone's intricate structure, with collagen providing flexibility and hydroxyapatite providing rigidity, makes it significantly stronger and more resilient than concrete in various mechanical scenarios.
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Bones have a higher tensile and compressional strength than concrete due to their composite structure of collagen fibers and mineralized matrix, along with a complex microarchitecture designed to adapt to mechanical stresses. These aspects make bones robust and efficient weight-bearing structures.
The aspects of bone's structure that make it stronger than concrete are related to its complex microarchitecture and composite nature, which enable it to have a high tensile strength and compressional strength. Bones are formed from collagen, much like the steel rebar in concrete, and a mineralized matrix rich in calcium, which bears similarity to the concrete itself. However, the collagen provides flexibility and tensile strength, while the inorganic salts provide compressional strength, making bones robust and capable of adapting to mechanical stresses.
The ultimate strength of human bones, particularly in the femur, is impressive, with an ultimate compressive strength of 205 MPa and an ultimate tensile strength of 135 MPa. This strength is a result of bones being weight-bearing structures, designed to carry loads much like the columns in a building or fibrous structures like trees. The engineering design of bones takes into account different stresses on different parts of the body, which is why the structure of the femur can vary from thin sheets separated by marrow to cylindrical shapes filled with or without marrow.
The elastic modulus of bone also varies based on whether it is under tension or compression, highlighting the bone's capability to withstand different directional forces. Such properties make bones incredibly efficient at carrying weight and resisting different types of stresses without fracturing under normal circumstances.
Which would most likely cause molten rock material to become glassy igneous rock?
A patient needs surgery to open a clogged heart artery. This patient should look for a surgeon who is an expert in which of the following?
The answer is B i know this because
superficial anatomy of the circulatory system
functional anatomy of the circulatory system
superficial anatomy of the nervous system
functional anatomy of the nervous system
its not a nervous system part so there goes the last two and superfical means from the outside of the body like skin and hair and the reproductive like testicals and and the ovarys stuff like that thus leaves your answer with the only logical one {functional anatomy of the circularory system}.
If an astronaut throws an object in space, the object’s speed will _____
PLEASE HELP!!!! 15 point!!!!!
Scientist tested the effect of a fertilizer on the growth of plants. They had two sets of plants Group A which gets fertilizer water & and Group B which gets only water and sun (but equal amounts to Group A)
1. Explain how this scenario is a controlled experiment and identify the manipulated variable?
2. If the scientist only performed one experiment but it supported their hypothesis why can it not be considered a theory?
What would you need to know to calculate the angular momentum of a man on a Ferris wheel?
To calculate the angular momentum of a man on a Ferris wheel you need to know the mass distribution, radius, initial and final angular velocity, and angular acceleration of the system.
Angular momentum of a man on a Ferris wheel can be calculated using the formula:
Angular momentum = Moment of inertia x Angular velocity
To calculate this, you would need to know the mass distribution, radius, initial and final angular velocity, and angular acceleration of the system.
The ideal mechanical advantage of a machine is 3.2 and its output distance is 2.5 meters. What is the input distance?
A 0.500-kg glider, attached to the end of an ideal spring with force constant undergoes shm with an amplitude of 0.040 m. compute (a) the maximum speed of the glider; (b) the speed of the glider when it is at (c) the magnitude of the maximum acceleration of the glider; (d) the acceleration of the glider at (e) the
To compute the maximum speed, use the equation vmax = Aω. At x = 0, the speed is 0. The maximum acceleration is given by amax = Aω².
Explanation:To compute the maximum speed of the glider, we can use the equation vmax = Aω, where A is the amplitude (0.040 m) and ω is the angular frequency. The angular frequency is given by ω = √(k/m), where k is the force constant (N/m) and m is the mass (kg). In this case, k = 80 N/m and m = 0.500 kg.
For part (b), the speed of the glider when it is at x = 0 (the equilibrium position) is 0. This is because the velocity is at a maximum when the glider passes through the equilibrium position, and at that point, it changes direction.
The maximum acceleration of the glider can be found using the equation amax = Aω². The magnitude of the maximum acceleration occurs at the position x = -A, so we can substitute -A for x in the equation. Finally, the acceleration of the glider at x = -A can be found by substituting this value into the equation a = -Aω².
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This can best be explained due to A) density. B) friction. C) gravity. Eliminate D) inertia.
Answer:
D
Explanation:
Two people push on the same door from opposite sides as shown they will only see the door move when
Answer: C.
Explanation: The only way that they will be able to see the door move is if only ONE of them exert more force than the other.
You can see that when they both exert the same force on the door, the forces are balanced, and cancel eachother out.
Hope this helped.
Have a nice day. :)