Answer:
1. A NaCl solution with a concentration of 50g/100mL of water at 40°C: The NaCl solution with a given concentration is saturated at this temperature .As the temperature increases the solution will more dissolves.
2. A sugar solution with a concentration of 200g/100mL of water at 40°C: The sugar solution with a given concentration is saturated at this temperature. As the temperature increases the solution will more dissolves.
3. A sugar solution with a concentration of 240g/100mL of water at 40°C: The sugar solution with a given concentration is saturated at given temperature.
Final answer:
The NaCl solution is unsaturated, the sugar solution is saturated, and the other sugar solution is supersaturated.
Explanation:
In terms of saturation, a solution can be classified as either unsaturated, saturated, or supersaturated.
The NaCl solution with a concentration of 50g/100 of water at 40°C is unsaturated because it contains less than the maximum amount of solute that can dissolve in the given amount of solvent.The sugar solution with a concentration of 200g/100 of water at 40°C is saturated because it contains the maximum amount of solute that can dissolve in the given amount of solvent.The sugar solution with a concentration of 240g/100 of water at 40°C is supersaturated because it contains more solute than can normally dissolve in the given amount of solvent at that temperature.
Why is it important to keep the temperature and the amount of water the same when testing surface area?
Answer:
The temperature and the amount of water need to be kept the same so that the only variable that changes is the surface area. If you allow the temperature and/or the amount of water to change too, you will not know which variable is causing the changes that you observe.
Explanation:
During testing surface area, it is important to keep the temperature and the amount of water same so that can can act as control variable.
What is control variable?Anything kept constant or constrained in a research study is referred to as a control variable. Despite not being relevant to the study's objectives, this variable is controlled because it might have an impact on the results.
Variables can be controlled either directly by maintaining their value throughout a study (for example, by maintaining a constant room temperature in an experiment) or indirectly by using techniques like randomization or statistical control (e.g., to account for participant characteristics like age in statistical tests). Research biases like omitted variable bias can be avoided by including control variables in your analysis.
As surface area of water is changeable to the temperature and the amount of water, during testing surface area, it is important to keep them same so that can can act as control variable.
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A celebrated Mark Twain story has motivated contestants in the Calaveras County Jumping Frog Jubilee, where frogs jump as long as 2.2 m have been recorded. If a frog jumps 2.2 m and the launch angle is 45°, find (a) the frog’s launch speed and (b) the time the frog spends in the air. Ignore air assistance.
To find the launch speed and the time the frog spends in the air, we can use the equations of projectile motion. The launch speed is approximately 4.4 m/s, and the time the frog spends in the air is approximately 0.63 s.
Explanation:To find the launch speed and the time the frog spends in the air, we can use the equations of projectile motion. Since the frog jumps at a launch angle of 45° and a distance of 2.2 meters, we can use the range equation to find the launch speed:
R = ((V^2) * sin(2θ)) / g
Substituting the given values:
2.2 = ((V^2) * sin(90°)) / 9.8
Simplifying the equation:
(V^2) * sin(90°) = 2.2 * 9.8
V = √((2.2 * 9.8) / sin(90°))
V ≈ 4.4 m/s
To find the time the frog spends in the air, we can use the following equation:
t = (2 * V * sin(θ)) / g
Substituting the given values:
t = (2 * 4.4 * sin(45°)) / 9.8
Simplifying the equation:
t ≈ 0.63 s
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The frog's launch speed and time spent in the air can be calculated using principles of projectile motion. The frog's launch speed is approximately 4.8 m/s, and it spends about 0.7 seconds in the air.
Explanation:To answer your query, we first need to apply some principles of projectile motion, specifically the equations of motion along the x-axis (horizontal) and y-axis (vertical).
For the first part of the question, we need to determine the frog's launch speed. We use the formula for the range of a projectile, given as R = (v^2 * sin(2*θ)) / g, where R is the maximum horizontal distance (2.2 m), θ is the launch angle (45°), g is the gravitational acceleration (approximately 9.8 m/s²), and v is the initial velocity which we're trying to find out. From this, we can calculate the frog's launch speed as approximately 4.8 m/s.
The second part of the question asks for the time the frog spends in the air. This duration is known as the time of flight. To calculate this, we can use the formula t = (2*v*sin(θ)) / g. Substituting the known values into this equation, we get the time spent in the air as approximately 0.7 seconds.
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Based on the graph, during what time period is the race horse moving at the FASTEST speed?
A) 0 to 1 second
B) 0 to 4 seconds
C) 2 to 4 seconds
D) 4 to 6 seconds
the answer is D) 4 to 6 seconds
Answer:the answer is D) 4 to 6 seconds This will help you guys
Explanation: To look at the graph
Which location would allow the least amount of water to be absorbed into the ground ?
1)A grassy terrain
2)A sandy beach
3)A Forest
4)A mountain
4) A Mountain
The rain would run down the slopes faster than be absorbed into the rocky ground.
A student observed a sample of water in three states of matter. The student should describe the liquid water as a state of matter that has
A. less kinetic energy than the solid state.
B. less volume than the solid state.
c. more mass than the solid state.
D. more kinetic energy than the solid state.
Answer:
B. Less volume than a solid state
Liquid water, in its state of matter, has more kinetic energy than when it is in a solid state, as particles move more freely in a liquid state which increases the kinetic energy.
Explanation:In the three states of matter, solid, liquid, and gas, the amount of kinetic energy differs. For water, as a liquid state, it possesses more kinetic energy than in a solid state. Kinetic energy relates to movement; in a solid state, particles are tightly packed and do not move much, thus having less kinetic energy.
When it changes to a liquid state, the particles gain energy, move more freely, increasing the kinetic energy. However, the transition from solid to liquid does not affect mass or volume significantly. Thus, the correct answer is D. more kinetic energy than the solid state.
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A person is walking in a straight line for 10 s. The person has an initial position that is negative with respect to a chosen origin, and their velocity is also negative during the entire 10 s. At the end of 10 s, is the person closer to or further from the origin than they were originally? Explain.
Answer:
The person is further from the origin then they where originally.
Explanation
The person starts with a negative displacement from the origin. They then move with a negative velocity, this means that they are walking away from the origin in the negative direction. This means that the displacement will end up a larger negative number than before, thus they are further away from the origin.
You place a block of wood on a table. How could you increase the pressure
the block exerts on the table?
O
A. Turn it to a larger face.
O
B. Move it to the floor.
O
C. Hold it above the table.
O
D. Turn it to a smaller face.
Answer:
i think the answer to this is D
Answer:
Turn it to a smaller face.
(D) is correct option.
Explanation:
Pressure :
Pressure is the inversely proportional to the area.
When the area of the block of face small then the pressure will be increases if the area of the block of face larger then the pressure will be reduce.
Pressure is equal to the force upon area.
In mathematically term,
[tex]P=\dfrac{F}{A}[/tex]
Where, F = force
A = area
P = pressure
Hence, Turn it to a smaller face.
Which statement best describes the change in an objects momentum if the net force acting on the object is greatly increased ?
Answer:
Answer C : The object's momentum will greatly increase
Explanation:
Recall that force and linear momentum are closely related by the equation:
[tex]F = \frac{MomentumChange}{time}[/tex]
Both, Momentum Change and Force (F) are in the numerator of on either side of the equation, so they are in direct proportionality. A large force (force greatly increased) will be the reflection of a large change in momentum.
Answer:
The object’s momentum will greatly increase if the net force acting on the object is greatly increased. So option C is the best statement which describes the change in object momentum.
Explanation:
So as the force is directly proportional to momentum and it is obtained by performing the first order derivation of momentum, the variation in force and momentum will have to be same.
[tex]F = \frac{MomentumChange}{time}[/tex]
The force being the derivative of momentum indicates that if the net force acting on object is greatly increased means the momentum will also be undergoing great increase as the acceleration of the object will also be increased greatly due to increase of force.
3. The shorter the wavelength, the
the frequency.
greater
1 smaller
U stronger
Answer:
Shorter the wavelength, the higher the frequency of the electromagnetic wave, and greater is the energy of the waveform or the photon. Frequency is always inversely related to the wavelength.
Explanation:
it is on google
Answer:
Shorter frequency mean the sounds lower but this doesn't mean smaller the the answer is greater or stronger
if a musical instrument such as a trumpet or flute is"flat"
Answer:
Then the note is below the tune it should be in.
If a trumpet or a flute is flat, the pipe needs to be shortened in order to increase the pitch of the sound.
Explanation:
Trumpet or flute, a musical equipment that usually works on sound waves concept. It works like an empty pipe with several holes. When blowing air, longitudinal sound waves get generated by different wave frequencies.
If we reduce the length of the pipe; this causes a higher frequency in the pipe. Longer tubes produce low-frequency sound waves that produce deep sound. Therefore, the length of the flute or trumpet should be shortened when it is flat.
The purpose of the little Albert experiment?
Answer:
The aim of Watson and Rayner was to condition a phobia in an emotionally stable child.
Explanation:
Does this help?
Final answer:
The Little Albert experiment aimed to demonstrate that fears could be conditioned through classical conditioning, challenging Freud's theory about phobias originating from internal conflicts.
Explanation:
The purpose of the Little Albert experiment conducted by John B. Watson and Rosalie Rayner was to demonstrate how emotions could be conditioned through classical conditioning. In the experiment, Little Albert was exposed to, and eventually conditioned to fear, various stimuli that were initially neutral to him, such as a white rat. The loud noise of a hammer striking a metal bar served as the unconditioned stimulus (UCS), the white rat was the conditioned stimulus (CS), the fear response to the loud noise was the unconditioned response (UCR), and the fear response to the rat was the conditioned response (CR). Through stimulus generalization, Little Albert's fear extended to other furry objects like a rabbit, a coat, and a Santa Claus mask. This experiment aimed to illustrate that phobias could be formed not by deep-seated conflicts, as Freud suggested, but through simple conditioning. The methodology and ethical considerations of this study have been widely criticized in modern times.
How much force is needed to stretch a spring 1.2m if the spring constant is 8.5N/m
Answer:
10.2N
Explanation:
Given spring constant k =8.5N and and elastic limit e =1.2m
using the relation F=ke (hookes law)
law stating that the strain in a solid is proportional to the applied stress within the elastic limit of that solid.
substituting the values into the equation, it becomes F=8.5N ×1.2m.
= 10.2N/m ~~ 10.2N as final answer.
The force needed to stretch a spring 1.2m, if the spring constant is 8.5N/m is calculated to be 10.2 newtons.
The amount of force needed to stretch a spring can be calculated using Hooke's Law, which states that the force required to stretch or compress a spring by some distance (x) is directly proportional to that distance.
The formula for Hooke's Law is F = kx, where F is the force in newtons, k is the spring constant in newtons per meter (N/m), and x is the distance in meters.
F = kx
F = 8.5 N/m × 1.2m
= 10.2 N.
Which particle would have the slowest rate of deposition? A.round particle B.very large particle C.particle with sharp ends D.particle with a high density
The particle with sharp ends have the slowest rate of deposition
Answer: Option C
Explanation:
As per aerosol physics, deposition is a process where aerosol particles accumulate or settle on solid surfaces. Thereby, it reduces the concentration of particles in the air. Deposition velocity (rate of deposition) defines from F = vc, where v is deposition rate, F denotes flux density and c refers concentration.
Deposition velocity is slowest for particles of intermediate-sized particles because the frictional force offers resistance to the flow. Density is directly proportional to the deposition rate so clearly shows that high-density particles settle faster. Due to friction, round and large-sized particles deposit faster than oval/flattened sediments.
Answer:
C.particle with sharp ends is the correct answer
Explanation:
particle with sharp ends would have the slowest rate of deposition.
The frictional force which is important that gives resistance to the movement will be higher for irregularly shaped particles and this is the reason sharp ends particles have the slowest rate of deposition.
Deposition happens when the particles settle down on a solid surface.
Density is directly proportional to deposition it means that the particles with high density settle faster and particle with sharp end has lower density so that the reason they have slowest deposition rate.
((HURRY PLLSS)) According to Einstein, nothing in the universe can move faster than which approximate speed?
1.0 × 107 m/s
1.0 × 108 m/s
3.0 × 108 m/s
3.0 × 109 m/s
.
Answer:
Woooo more points!!!!!! Also thanks to the dude or dudette who gave the answer hope its correct
Explanation:
UHM OK ....EDIT: THE REAL ANSWER IS 3.0 x 10^8
Edit again: well my answers were different on edge but if ur from edge that’s the answer
According to Einstein, nothing in the universe can move faster than the approximate speed of light in vacuum equal to 3.0 × 10⁸ m/s.
What is speed of light?The speed with which the light ray travels in a medium with negative pressure or in vacuum.
This speed is the greatest speed in the universe. No matter can have speed greater than the speed of light in vacuum.
Thus, nothing in the universe can move faster than which approximate speed 3.0 × 10⁸ m/s.
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carbon nonoxide formula
Final answer:
Carbon monoxide's chemical formula is CO; it's a toxic gas formed by the incomplete combustion of carbon-containing materials and can react with oxygen to form carbon dioxide (CO₂).
Explanation:
The student is asking about the chemical formula for carbon monoxide, which is CO. This compound is composed of one carbon atom covalently bonded to one oxygen atom. Carbon monoxide is a colorless and very toxic gas with no smell, and its boiling point is -190 °C. It is produced through the incomplete combustion of carbon-containing materials. An increased concentration of this gas in the air can be hazardous to health, as it can bind with hemoglobin in blood, preventing proper oxygen transport.
Additionally, in terms of chemical reactions, carbon monoxide can react further with oxygen to form carbon dioxide (CO₂), which is a gas with the structural formula O=C=O, indicating that the carbon atom forms two double covalent bonds with the oxygen atoms. Carbon dioxide is a common greenhouse gas in Earth's atmosphere.
A group of students use a scale to measure the mass of an object. Which of the following would be the appropriate base unit of measurement to use: a meter b Liter c gram d Newton e none of these
Answer:
c Gram
Explanation:
Mass is an intrinsec property of every object; it is somehow a measure of the "amount of matter" contained in the object.
The SI units of the mass is the kilogram (kg), where one of the sub-multiple of the kilogram is the gram (g). For measuring small objects, therefore, the gram is the appropriate unit.
The other units are wrong because:
- The meter is the unit of measure of the length
- The liter is a unit of measure for the volume
- Newton is the unit of measure for the force
suppose you found a yellow piece of metal in a stream how can you tell if it's real gold
Answer: you can tell if its gold by seeing if the rock it is found in is quartz. or you could put the gold up to a magnet, if it is real gold, it will not stick.
Explanation:
The metal piece found can be tested to clear whether it is gold or not by performing some qualitative analysis using nitric acid. If its dust dissolve in the acid, then it is not gold.
What is gold?Gold is a transition metal and it is 79th element in periodic table. Gold exhibits all the metallic properties such as malleability, ductility, luster, color etc. Thus, it is widely used to make ornaments.
To test whether the yellow piece of metal is gold or not rub it on a black stone to leave a recognizable mark in order to conduct this test. Apply nitric acid to the mark after that. Any base metals that aren't genuine gold will dissolve in the acid.
Similarly a few drops of vinegar is applied to the item. It is not pure gold if the drops cause the metal to change hue. It is pure gold if the color remains the same.
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Scientific fact can never change
1)True
2)False
Answer:
True.
Explanation:
A scientific fact is a fact because it has been proven correct, and therefore cannot change.
Answer: 2)False
Explanation:
The scientific fact may include the statement which is based on direct observation of a scientific phenomena, scientific event or scientific process occurring in the natural world. The scientific fact is the output of what scientists believe and understand. The knowledge of scientific fact can change with the passage of time due to implementation of new methodologies, technologies and innovations.
if a box has a length of 10.0 cm, with a width of 15.0 cm, and a height of 5.0 cm, then what is the volume in m3?
A) 7.5 x 10 ^ -3
B) 750 x 10^2
C) 7.5 x 10^2
D) 7.5 x 10^ -4
The volume of the box is calculated by multiplying the length, width, and height given in centimeters. The volume comes out to 750.0 cm³. This converted to cubic meters (m³) gives us 0.00075 m³ or 7.5 x 10⁻⁴ m³. So the answer is D) 7.5 x 10⁻⁴ m³.
Explanation:To answer your question about the volume of the box given the length, width and height in centimeters, we first need to understand that the volume is the amount of space that a substance or object occupies. In this case, the box.
The formula for volume is Volume= Length × Width × Height. So, we simply need to multiply the given measurements to get the answer in cubic centimeters (since the measurements are given in centimeters).
Let's do the math: Volume = 10.0 cm × 15.0 cm × 5.0 cm = 750.0 cm³.
However, the question asks for the volume in cubic meters (m³). To convert cubic centimeters to cubic meters, we need to know that 1m³ = 1,000,000 cm³. So, we divide our answer by 1,000,000 to get the answer in m³. Hence, 750.0 cm³ ÷ 1,000,000 = 0.00075 m³ or 7.5 x 10⁻⁴ m³. So the correct option is D) 7.5 x 10⁻⁴ m³.
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The volume of the box is given by the multiplication of length, width, and height in cm, then converted to cubic meters. The correct volume in cubic meters is 7.5 x 10^-4 m³.
Explanation:The student wants to calculate the volume of a box given the dimensions in centimeters and receive the result in cubic meters. The formula for the volume of a box (or a rectangular prism) is length x width x height. So first, we calculate the volume using the provided dimensions: 10.0 cm (length) x 15.0 cm (width) x 5.0 cm (height) = 750 cm³. However, to convert this value into cubic meters (m³), we need to know that 1m³ = 1,000,000 cm³. So, we divide 750 cm³ by 1,000,000 to get 0.00075 m³. Representing this number in scientific notation will give us 7.5 x 10^ -4, which corresponds to option D.
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Is this an open or a closed circuit?
Answer:
It is a closed circuit.
How do you calculate an object’s mechanical energy?
The formula for mechanical energy is mechanical energy equal to kinetic energy plus potential energy
The calculation of mechanical energy is done via two components of mechanical energy, which are kinetic energy and potential energy.
Explanation:
Kinetic energy is the energy which is required to perform an action. Potential energy is the energy which the body has, just due to the virtue of being capable of doing work. Potential Energy is calculated by,
[tex]U=\boldsymbol{m} \times \boldsymbol{g} \times \boldsymbol{h}[/tex]
Kinetic energy is calculated by, [tex]K .E.=\frac{1}{2} m v^{2}[/tex]
Therefore, Energy=kinetic energy + potential energy
[tex]\text { Energy } E=\frac{1}{2} m v^{2}+m g h[/tex]
Which of these experiments would make use of qualitative data?
A. a study of different surfaces to compare luster or shine
B. a study of different shapes to compare rolling frictions
C. a study on the change in freezing point of water when salt is added
D. a study on the effects of sunlight on the growth rate of plants
Answer: A. a study of different surfaces to compare luster or shine
Explanation:
A qualitative data can be define as the data that can only be observed and recorded but it cannot be counted in numbers. This type of data cannot be measured in units. For example, color.
A is the correct option. This is because of the fact that luster and shine can only be observed it cannot be measured in units and counted in numbers. It just represents the physical observable property of a material.
A car is moving northeast at a velocity of 10 meters per second. Four
seconds later it's going 30 meters per second. What was the car's average
acceleration during this time?
A) 5 m/s
B) 5 m/s²
C) 5 m/s² Northeast
D) 20 m/s² Northeast
The average acceleration of car during this time is 5 [tex]m/s^2[/tex] Northeast.
Answer: Option C
Explanation:
The acceleration exerted by an object is the rate of change in velocity the object undergoes with respect to time. Average acceleration is the measure of variation in acceleration in a given interval of time.
[tex]\text {Average acceleration}=\frac{\text {Final velocity - Initial velocity}}{\text {Time Period}}[/tex]
Here, final velocity is 30 m/s and initial velocity is 10 m/s. The final velocity is attained by the car after 4 s. Thus, the average acceleration will be
[tex]\text {Average acceleration}=\frac{30-10}{4}=\frac{20}{4}=5 \frac{\mathrm{m}}{\mathrm{s}^{2}}[/tex]
So, the average acceleration is 5 [tex]m/s^2[/tex] and as the car was moving in the northeast direction, the average acceleration will also be exerting in the northeast direction only.
What is defined by force per unit area
Answer:
Pressure
Explanation:
Let , us understand by a simple example. Let us apply some force into a needle into a cardboard what we observe , we saw that the needle get into the cardboard.
Now we will apply the same force with a water bottle into the same cardboard , now we noticed that it doesn't get buried into it.
In both examples we noticed that force applied in both the cases is equal but the surface area of the object in which force applied is different.
Here come the term pressure.
Pressure is defined as force applied per unit area.
Therefore , as area increases pressure also decreases . That's why bottle don't get buried but needle go through it.
Force per unit area is defined as pressure, a critical concept in Physics. Measured in pascals (Pa), it refers to how force is distributed over a certain area. The smaller the area, the greater the pressure for a given force.
Explanation:The term force per unit area is defined as pressure. In the field of physics, it is a prominent concept and commonly used in various studies related to fluids, gases, and solids. Pressure is typically measured in pascals (Pa), which is equivalent to a force of one newton per square meter (N/m^2).
An example that can help you understand this concept is pressing your hand against a wall. The force you're applying is spread over the area of your hand that touches the wall. If you use the same force but decrease the contact area by using just a finger, you'll feel more pressure because the same force is now distributed over a smaller area.
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what is the correct definition of speed.
distance (miles or meters)
time per distance (hours per mile or seconds per meter
distance per time (miles per hour or meters per second)
time (hours or seconds)
Explanation:
Speed is defined as distance per time (miles per hour or meter per second)
Distance per time (miles per hour or meters per second) is the correct definition of speed. Option 3 is correct.
Speed is defined as the distance traveled by an object per unit of time. It represents how fast an object is moving and is typically measured in units such as miles per hour (mph) or meters per second (m/s). The correct definition of speed is "distance per time," meaning it quantifies the rate at which an object covers a certain distance in a given amount of time.
In the context of the provided options:
Option A, "distance (miles or meters)," only provides the distance traveled without considering the time taken, so it doesn't capture the concept of speed.
Option B, "time per distance (hours per mile or seconds per meter)," does not accurately represent speed; it actually represents the inverse of speed, known as the time taken to cover a unit distance.
Option C, "distance per time (miles per hour or meters per second)," is the correct definition of speed, as it directly relates the distance covered to the time taken, providing a measure of how quickly an object moves.
Option D, "time (hours or seconds)," only provides information about time and does not include the concept of distance, which is necessary to define speed.
In summary, the correct definition of speed is the rate of change of distance with respect to time, represented as "distance per time," and it is typically expressed in units like miles per hour or meters per second.
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What is the value of work done on an object when a 50–newton force moves it 15 meters in the same direction as the force?
A.
435 joules
B.
97.3 joules
C.
750 joules
D.
693 joules
Answer:
Work done, W = 750 joules
Explanation:
It is given that,
Force acting on the object, F = 50 N
It moves to a distance of, d = 15 meters
We need to find the work done on an object. We know that the product of force and distance covered is called the work done. As the force and the displacement are in same direction. So,
[tex]W=F\times d[/tex]
[tex]W=50\ N\times 15\ m[/tex]
W = 750 joules
So, the work done on an object is 750 joules. Hence, this is the required solution.
Final answer:
The work done on the object is 750 joules, calculated by the formula work equals force times distance, using the given values of a 50-newton force and a 15-meter distance.
Explanation:
The work done on an object can be calculated by using the formula W = F × d × cos(θ), where W is the work done, F is the force applied, d is the distance over which the force is applied, and θ is the angle between the force and the direction of motion. Since the force and the direction of motion are the same in this case, θ = 0 degrees and cos(0) = 1, thus the equation simplifies to W = F × d. The force exerted is 50 newtons, and the distance is 15 meters, so the work done on the object is W = (50 N) × (15 m) = 750 joules.
How do boron-10 and boron-11 differ?
Boron-10 and Boron-11 are isotopes of Boron. They have the same number of protons (5), but Boron-10 has 5 neutrons while Boron-11 has 6 neutrons.
Explanation:Boron-10 and Boron-11 are isotopes of the element Boron, meaning they are the same element but with a different number of neutrons. Boron-10 has 5 protons and 5 neutrons in its nucleus for a total atomic mass of 10. In contrast, boron-11, has 5 protons and 6 neutrons leading to an atomic mass of 11. Both versions of boron are naturally occurring and stable, but boron-11 is slightly more abundant on Earth.
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Boron-10 and boron-11 are isotopes of boron with different masses. The average atomic mass of boron is 10.8 amu.
Explanation:Boron-10 and boron-11 are isotopes of the element boron. Boron-10 has a mass of approximately 10 amu, while boron-11 has a mass of approximately 11 amu. The average atomic mass of boron is 10.8 amu, which is a weighted average of the two isotopes based on their abundance in nature.
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When the air density is 0 kg/m°(vacuum), how long will it take an object to reach terminal velocity?
a. It reaches terminal velocity immediately.
b. 2 seconds
5 Seconds
d. The object never reaches terminal velocity.
Answer:
d. The object never reaches terminal velocity.
Explanation:
Terminal velocity is the velocity a falling object reaches when the air resistance equals the weight. But in a vacuum, there is no air resistance. So the object never reaches terminal velocity.
Where are elements with few valence electrons found on the periodic table
Elements with few valence electrons are found in the alkali metals (group 1) and alkaline earth metals (group 2) on the left side of the periodic table. They tend to lose electrons to form positively charged ions and have one or two valence electrons respectively.
Explanation:Elements with few valence electrons are found on the left side of the periodic table. Specifically, the alkali metals in group 1 each have only one valence electron, while the alkaline earth metals in group 2 each have two valence electrons. As you move from left to right across a period, the number of valence electrons increases until you reach the noble gases, which have full valence shells and are highly stable and non-reactive.
Valence electrons are the electrons in the outermost shell, and they play a key role in determining an element's chemical properties. These electrons can either be lost, gained, or shared to achieve a full valence shell, mimicking the electron configuration of the nearest noble gas. This behavioral pattern results in the formation of either positively charged ions when electrons are lost or covalently bonded structures when electrons are shared.
a force of 25 newtons moves a box a distance of 4 meeters in 5 seconds.the work done on the box is ? NM and the power is. ? nm/ s
Answer:
The work done on the box is 100 Nm
The power is 20 Nm/s
Explanation:
There is a force 25 newtons moves a box a distance of 4 meters in
5 seconds
The work done on the box is the product of the force and the distance
that the box moves ⇒ work = force × distance
The force = 25 newtons
the distance = 4 meters
Work = 25 × 4 = 100 NM
The work done on the box is 100 Nm
The force moves the box 4 meters in 5 seconds
The power is the rate of work
The power = work ÷ time
The work = 100 Nm
The time = 5 seconds
The power = 100 ÷ 5 = 20 Nm/s
The power is 20 Nm/s
The work done on the box is 100 Newton Meters and the power used is 20 Newton Meters per second.
Explanation:In Physics, work done is calculated as the 'force' times the 'distance' over which the force is applied. Hence the work done in moving the box would be Work = Force x Distance = 25 Newtons x 4 meters = 100 Newton Meters (or 100 Joules, as 1 Joule = 1 Newton meter).
The 'power' is defined as the rate of doing work or the amount of work done per unit time. Hence the power would be Power = Work / Time = 100 Newton Meters / 5 seconds = 20 Newton Meters per second (or 20 Watts, as 1 Watt = 1 Joule/second).
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