Construction lines are essential for maintaining the accuracy and integrity of designs in fields like engineering, architecture, and mapping. Erasing such lines can lead to misunderstandings and inaccurate representations, potentially causing disastrous outcomes in the physical construction or interpretation of structures and mappings.
Construction lines should not be erased because they serve as foundational elements for a design, representing the initial guidelines that contribute to the final drawing or structure. For example, in topographic map interpretation, contour lines are crucial as they indicate the elevation and shape of the terrain, and erasing them would eliminate critical information required for understanding landform shapes and gradients. Similarly, when engaging in geological mapping, one must ensure that a geologic trace does not cross a topographic contour except where the structural and topographic contours intersect, preserving the accuracy of geological interpretations.
Moreover, the principles of geometry are deeply rooted in the correct understanding and depiction of lines and spaces. As in engineering and architecture, where accurate measurements and representations are foundational to the construction process, any disruption or erasing of essential lines can lead to disastrous outcomes, undermining the integrity of the structures being designed or built. Thus, construction lines must be preserved to maintain a clear and accurate representation of designs, allowing for their proper understanding, interpretation, and implementation.
The force that pulls objects toward each other
Final answer:
Gravity is the force that pulls objects toward each other, always acting to bring masses together. It is determined by the mass of the objects, with larger objects exerting stronger gravitational pulls. This force is vital in everyday phenomena and in the broader understanding of the universe.
Explanation:
The force that pulls objects toward each other is known as gravity. This fundamental force is omnipresent in nature, always acting in an attractive manner between two objects. The strength of gravitational pull is directly related to an object's mass; therefore, the larger an object, the stronger its gravitational pull. Unlike other forces that can push objects apart, gravity uniquely pulls them together. It's important to note that every object with mass in the universe exerts a gravitational pull on every other mass, a principle crucial in understanding the cosmic ballet of celestial bodies, as well as the everyday phenomenon of objects falling towards the Earth.
Gravity's effect is evident in daily experiences, such as why we stay grounded on Earth and not drift off into space. The understanding of gravity also plays a crucial role in designing structures and in aerospace engineering, where gravitational forces must be accounted for. The gravitational force is consistent with Newton's third law, indicating that the force experienced between two objects due to gravity is equal in magnitude and opposite in direction, aligning along a line joining the centers of mass of the two bodies involved.
Calculate the kinetic energy of an 84-kg scooter moving at 18 m/s .
Answer:
13608 joules
Explanation:
We are given that mass of scooter=84 kg
Speed of scooter=18 m/s
We have to calculate the kinetic energy
We know that formula of kinetic energy
[tex]K.E=\frac{1}{2}mv^2[/tex]
Substitute the values then we get
K.E=[tex]\frac{1}{2}\times 84\times (18)^2=13608 joules[/tex]
Hence, the kinetic energy of an scooter=13608 joules
Calculate the acceleration of a 25 kg object that has move the force of 300 n
The force on the body of mass 25 kg is 300 N then the acceleration of the body will be equal to 12 m/s².
What is acceleration?The rate of change in an object's velocity with respect to time is known as acceleration in mechanics. The vector quantity of accelerations. The direction of the net force that is acting on an object determines its acceleration.
Since acceleration has both a magnitude and a direction, it is a vector quantity. Velocity is a vector quantity as well. The definition of acceleration is the change in velocity vector over a time interval divided by the time interval.
As per the information given in the question,
Force, F = 300 N
Mass, m = 25 kg
Use the formula of force,
F = ma
300 N = 25 × a
a = 300/25
a = 12 m/s²
Therefore, the acceleration is 12 m/s².
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i do not know why but the answer is 684 please let me know why. A light with a second-order dark band forms a diffraction angle of 20.0°. The diffraction grating has 200.0 lines per mm.
The wavelength of the light, to the nearest whole number, is nm.
Final answer
The wavelength of the light, to the nearest whole number, is 684 nm.
The formula for the diffraction grating is given by d sin( heta) = m extlambda, where d is the distance between adjacent gratings, heta is the angle of diffraction, m represents the order of the maximum, and extlambda is the wavelength of the light. For a grating with 200.0 lines per mm, the distance d is the inverse of the number of lines per meter, which is 1/(200,000) meters or 5 x 10^-6 m. The given second-order dark band (m=2) forms at a 20.0°(diffraction angle). Using these values in the diffraction grating equation, solving for extlambda yields a wavelength of approximately 684 nm. This can be calculated as follows: 5 x 10^-6 m * sin(20.0°) = 2 extlambda, leading to extlambda approximately equals 684 nm after computation.
what physical properties of nylon and leather make them good materials to use for shoe laces?
How much bigger is the sun than the earth?
The sun is 900,000 miles (1,448,410 km) wide. It is the brightest object in the sky. To put into perspective how big the sun is, about 1.4 million Earths could fit inside the sun!
One molecule of glucose makes 30 molecules of atp. how many molecules of glucose are needed to make 300 molecules of atp in aerobic respiration?
Answer:
10
Explanation:
The glucose molecules produce the energy currency ATP by the process of glycolysis. If one molecules of glucose makes 30 molecules of ATP, then 10 glucose molecules are needed to make 300 molecules of ATP in aerobic respiration.
What is glycolysis?Glycolysis is the process of breakdown of glucose to produce the chemical energy in the form of ATP i.e. Adenosine triphosphate. Glycolysis is called the cellular respiration where the oxygen and glucose is consumed to produce ATP and carbon dioxide.
Body stores the chemical energy in the form of glucose, when body needs energy, these glucose molecules are broken down to produce ATP.
If one molecule of ATP produces 30 ATP molecules, then, the number of glucose molecules needed to produce 300 ATP molecules is:
= (300 /30) = 10
Therefore 10 glucose molecules are needed to produce 300 ATP molecules.
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Nearly all physics problems will use the unit m/s squared. Why are the seconds squared?
The air inside a balloon exerts a force of 1.5 n on an area of 0.5 m^2. what is the pressure inside the balloon?
Lesson 9: Fluid Pressure (connexus students!)
1.D) 3 n/m^2
2.C) 2 meters below the surface of a swimming pool
3.B) cork
4.A) depends only on the type of fluid
5.A) the air pressure decreases
The ratio of red to blue marbles in a bag 3:2. If there are 18 red marbles. How many blue marbles are in the bag
If the ratio of red to blue marbles in a bag is 3 : 2 . If there are 18 red marbles, then there are 12 marbles in the bag.
What is the percentage of a number?It is the relative value that represents the hundredth part of any number for example 2% of any number represents, 2 multiplied by the 1/100th of that number.
As given in the problem, the ratio of red to blue marbles in a bag is 3:2. If there are 18 red marbles, then we have to find the number of blue marbles,
The number of the blue marbles = 18 × 2 / 3
= 12
Thus, If the ratio of red to blue marbles in a bag is 3 : 2 . If there are 18 red marbles, then there are 12 marbles in the bag.
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What will be the acceleration of a skydiver when air resistance builds up to 86% of her weight? assume the acceleration due to gravity is 10 m/s 2 . answer in units of m/s 2 ?
The acceleration of a skydiver when air resistance is 86% of her weight is calculated by finding the net force on her (weight minus air resistance), then dividing this by her mass. The result is 1.4 m/s^2, reflecting the balance of forces and the concept of terminal velocity.
Explanation:To calculate the acceleration of a skydiver when the air resistance is 86% of her weight, we must first understand that the net force on the skydiver is her weight minus the force of air resistance. If the air resistance is 86% of the skydiver's weight, then only 14% of her weight is acting downwards. Considering the weight (force) is the mass (m) times the acceleration due to gravity (g), or F=mg. We then have, a = Fnet / m = 0.14 * weight / m = 0.14 * g (as weight = mg).
Given g (acceleration due to gravity) is 10 m/s2, substituting this into our equation gives an acceleration of a = 0.14 * 10 m/s2, which is 1.4 m/s2. Therefore, the acceleration of the skydiver when air resistance builds up to 86% of her weight is 1.4 m/s2.
It's important not only to understand formulae in physics but also the concepts they express. In this situation, that concept is the balance of forces and how they affect an object's movement. In the case of a skydiver, as they fall, air resistance builds up until it equals their weight, causing their acceleration to decrease until they reach a constant velocity, known as 'terminal velocity'.
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We can determine the __________ of a wave when given the frequency and the wavelength.
amplitude
velocity
equilibrium
crest
Answer:
velocity
Explanation:
The relation between wave velocity, frequency and wavelength of a wave is given by
wave velocity = frequency x wavelength
So, as the frequency and wavelength is given we can find the wave velocity.
Imagine standing on a bathroom scale and reading your weight. now lift one foot and read your weight again. does the scale read more, less or the same weight when you are standing on one foot?
Answer:B
Explanation: Because the weight will be greater with one leg lifted up in the air, it will make the weight more.
what type of wave is a sound wave
A.transverse wave
B.longitudinal wave
C. light wave
D. elctromatic wave
Answer:
What wave is a sound wave?
For a sound wave traveling through air, the vibrations of the particles are best described as longitudinal. Longitudinal waves are waves in which the motion of the individual particles of the medium is in a direction that is parallel to the direction of energy transport.
Explanation:
If your mass is 20kg, and you stand on the scale (witch is your force), and the acceleration due to gravity is10m/s^2, what does the scale says your weight is?
Answer:
[tex]\Huge \boxed{\mathrm{200 \ N}}[/tex]
Explanation:
[tex]\sf Weight \ (N)= mass \ (kg) \times acceleration \ of \ gravity \ (m/s^2)[/tex]
[tex]W=mg[/tex]
Your mass is 20 kg.
The acceleration of gravity is approximately 10 m/s².
[tex]W=20 \times 10[/tex]
[tex]W=200[/tex]
Your weight is 200 N.
The density of a gas is 3.16 g/l at stp. what is the gas?
The gas is chlorine gas
Explanation and solution;Density at STP = 3.16 g per L
1 mole of a gas at STP occupies, 22.4 L
Therefore, it means mass of the gas in 22.4 L that is 1 mol gas will be;
= 3.16 g × 22.4 L
= 70.8 g/mol
≈ 71 g/mol
The identity of the gas would be Chlorine gas, whose molar mass is 71 g/mol
Given the density of the gas at standard temperature and pressure, we can use the molar volume of a gas at STP to determine the molar mass. Using this process, the gas is likely to be Bromine (Br2).
Explanation:The density given is a key factor to determine the gas. Because the question refers to standard temperature and pressure (stp), we can use the known molar volume of a gas at stp, which is 22.4 L/mol. Based on the given density and the molar volume, we can calculate the molar mass of the unknown gas:
Density = Molar mass / molar volume,
so Molar mass = Density x molar volume = 3.16 g/L x 22.4 L/mol = 70.784 g/mol.
Based on common molar masses, this results indicates that the unknown gas is most likely Bromine (Br2), as its molar mass is approximately 79.9 g/mol, the closest common molar mass to 70.784 g/mol.
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Which telecommunications device is ideal for communication during natural disasters when regular telecommunication modes might not be functional?
Answer:
satphone
Explanation:
plato users
Answer:
Explanation:
sat phone
common knowledge mate
Which of the following is most likely to be attracted to a magnet? A. A piece of glass B .A piece of plastic C .A stainless-steel paper clip D .A wet newspaper
You answer your phone at home several times a day, but it is always a telemarketer. Finally you stop answering it. This is an example of
A. Passive avoidance
B. Extinction
C. Negative reinforcement
D. A variable ratio schedule
Dry air will break down if the electric field exceeds about 3.0 Ã 106 v/m. what amount of charge can be placed on a capacitor if the area of each plate is 7.9 cm2?\
The angle a vector makes with the x-axis of a coordinate system must be what size in order to make one or more of its components negative?
A)less than 30 degrees
B)between 30 and 60 degrees
C)between 61 and 90 degrees
D)greater than 90 degrees
While traveling south on an expressway, a car traveling 60 mph (miles per hour) slows down to 30 mph in 12 minutes due to traffic conditions. Calculate the acceleration.
To calculate the car's acceleration, we convert the initial speed of 60 mph to 26.8 m/s and the final speed of 30 mph to 13.4 m/s. Using the acceleration formula (final velocity minus initial velocity divided by time), the acceleration is found to be [tex]-0.0186 m/s^2[/tex] over the 720 seconds (12 minutes), indicating that the car is decelerating.
To calculate the acceleration of the car, we first need to convert the speeds from miles per hour to meters per second (m/s). Since the car slows down, the acceleration will be negative. The initial speed is 60 mph, which is equivalent to 60 imes 1609/3600 m/s or approximately 26.8 m/s. The final speed is 30 mph, which is equivalent to 30 1609/3600 m/s or approximately 13.4 m/s. The time taken to slow down is 12 minutes, which is 12 60 seconds or 720 seconds. Now we use the formula for acceleration, which is a = (v_f - v_i) / t, where v_f is the final velocity, v_i is the initial velocity, and t is the time taken. Thus, the acceleration a is (13.4 m/s - 26.8 m/s) / 720 s = [tex]-0.0186 m/s^2[/tex]. The negative sign indicates that the car is decelerating.
A typical garden hose has an inner diameter of 5/8". Let's say you connect it to a faucet and the water comes out of the hose with a speed of 7.0 feet per second. If you then put your thumb over the end of the hose so the opening is only a circle 0.25" across, with what speed will the water stream out now?
The speed of the water will be "43.75 ft/sec".
According to the question,
Initially inner diameter,
5/8 inch or 0.052 ftFinal diameter,
0.25 inch or 0.0208 ftBy continuity equation, we get
→ [tex]Area1\times Velocity1=Area2\times Velocity2[/tex]
By substituting the values, we get
→ [tex]pi\times (\frac{0.052}{2} )^2\times 7= pi\times (\frac{0.0208}{2} )^2\times Velocity[/tex]
→ [tex]Velocity = 43.75 \ ft/sec[/tex] (speed)
Thus the above answer is correct.
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A rock is dropped from the top of a building. after 4 seconds it is moving at 40 m/s. what was the acceleration of the rock
Which is a better conductor of thermal energy a plastic foam cup or window glass?
Window glass is a better conductor of thermal energy than a plastic foam cup which acts as a good thermal insulator, slowing down the transfer of heat. The foam cup is better at keeping the heat in, while the window glass allows more heat to pass through.
Explanation:In the comparison between window glass and a plastic foam cup, the better conductor of thermal energy is window glass. Some materials conduct thermal energy faster than others. Materials like glass and metals are generally good heat conductors, whereas materials such as plastic and rubber are poor heat conductors. Plastic foam like polystyrene foam seen in disposable cups is actually a good thermal insulator, meaning it slows down the transfer of heat. As such, it's great for keeping your coffee hot by reducing heat transfer from the coffee to the environment.
On the other hand, window glass, while not as conductive as metals, still conducts heat at a much faster rate than plastic foam. It is therefore less effective as a thermal insulator, which is why you may feel the cold through a window on a chilly day. Window glass is seen as a major region of heat transfer in buildings, as it allows heat to escape from the interior to the exterior.
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A car with a leftward velocity and a rightward acceleration is moving where ?
A plane flies 600 kilometers away from its bad at 400 meters per second then flies back to its base at 600 meters per second. What is it’s average velocity?????
while flying over the grand canyon the pilot
You drop a ball from a height of 2.0 m, and it bounces back to a height of 1.5 m. (a) what fraction of its initial energy is lost during the bounce? (b) what is the ball's speed just as it leaves the ground after the bounce? (c) where did the energy go?
a) At a position of 2.0m, the Initial energy is
all made up of the potential energy=m*g*hi
and meanwhile at 1.5 all its energy is also potential energy=m*g*hf
The percentage of energy remaining is E=m*g*hi/m*g*hf x 100
and since mass and gravity are constant so it leaves us with
just E=hi/hf
which 1.5/2.0 x100= 75% so we see that we lost 25% of the
energy or 0.25 in fraction
b) Here use the equation vf^2=vi^2+2gd
where g is gravity, vf is the final velocity and vi is the
initial velocity while d is the distance travelled
so in here we are looking for the vi so let us isolate that
variable
we know that at maximum height or peak, the velocity is 0 so
vf is 0
therefore,
vi =sqrt(-2gd)
vi =sqrt(-2x-9.81x1.5)
vi =5.4 m/s
c) The energy was converted to heat due to friction with the
air and the ground.
The basic unit of pressure mapped on weather maps is
The basic unit of pressure mapped on weather maps is Millibar (mb). The correct option is A.
The standard unit for displaying atmospheric pressure on weather maps is the millibar, which is a frequently used unit of pressure in meteorology. It is equal to 100 pascals, or one thousandth of a bar.
Isobars, or lines bridging regions of equal atmospheric pressure, are shown on weather maps, and they are commonly labelled in millibars.
With the aid of this device, meteorologists can quickly analyse and evaluate pressure variations and patterns across various geographic locations, which aids in comprehending weather systems and the circumstances that go along with them.
Thus, the correct option is A.
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Your question seems incomplete, the probable complete question is:
The basic unit of pressure mapped on weather maps is
A) Millibar (mb)
B) Pascal (Pa)
C) Atmosphere (atm)
D) Pound per square inch (psi)