Answer:
C)constant velocity
Explanation:
it is probably corrected
A force along the length of a medium, especially a force carried by a flexible medium, such as a rope or cable
A. Stress
B. Tension
C. Strain
D. None of the options
Answer:
B
Explanation:
Tension is a force along the length of a medium, especially a force carried by a flexible medium, such as a rope or cable.
Answer:
B. Tension
Explanation:
A tension is a force along the length of a medium, especially a force carried by a flexible medium, such as a rope or cable.
A ray of light strikes a plane mirror at an angle of incidence 35°. If the mirror is rotated through 10°.
i. what is the angle of reflection before rotating the mirror?
ii. through what angle is the reflected ray rotated?
iii. what is the angle between the incidence ray and the new reflected ray?
Answer:
1 35°
2 20°
3 50°
..............
A student doing an experiment spilled some salt and sugar into the sink. How should these substances be cleaned up?
Answer:
I guess rinse it out and wipe it up. It's not a hazardous substance so there's nothing to worry about.
These substances should be cleaned up rinsing the area or removing the compounds with a cloth and dispose of it in the trash.
Sugar is a chemical compound also called sucrose. Its chemical formula is C12H22O11. This compound is normally used to sweeten foods.
On the other hand, common salt is a chemical compound. Its chemical formula is NaCl. This compound is normally used to give food a salty taste.
According to the above, in which a student spilled some salt and sugar in the sink and does not know how to clean it, it can be concluded that the proper way to clean these chemical compounds is by rinsing the area or removing the compounds with a cloth and dispose of it in the trash because neither of them represents biological, chemical or physical risks and a specialized treatment is not required for them.
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what is the critical speed below which the rope woudl becom slack when the bucket reaches the highest point in the circle
The critical speed below which the rope would become slack when the bucket reaches the highest point in the circle is determined by the length of the rope and the radius of the circle.
When the bucket is at the highest point in the circle, it is momentarily at rest and the tension in the rope must be zero.
The formula for calculating the critical speed at which the rope becomes slack is:
v = √(gr)
where v is the critical speed, g is the acceleration due to gravity, and r is the radius of the circle.
For example, if the radius of the circle is 2 meters and the acceleration due to gravity is 9.8 m/s², the critical speed would be:
v = √(9.8 × 2) = 4.4 m/s
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which glass is used in astrology?
Answer:
The answer is either looking glass or stained glass.
Explanation:
The popular glass used in astrology is stained glass which is popular in symbolization of huge astrology figures. As for looking glass, it's more popular in astrological souvenirs or objects.
Answer:
i think answer is pisces horoscope
A spherical mirror used in solar furnace focuses sunlight on its principal axis at a distance 12 cm from its pole. The radius of curvature of the mirror is
20 POINTS
Answer:
R = 24 cm
Explanation:
Given that,
A spherical mirror used in solar furnace focuses sunlight on its principal axis at a distance 12 cm from its pole. It means the focal length of the mirror is equal to 12 cm
We need to find the radius of curvature of the mirror. Let it is R. We know that the relation between radius of curvature and the focal length is given by :
R = 2f
So,
\(R=2\times 12\\\\=24\ cm\)
So, the radius of curvature of the mirror is equal to 24 cm.
PLEASE HELP!!!!!
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Some benefits of using a scale model by planetary scientists are:
It is possible for scientists to examine systems that are normally difficult to understand Smaller parts of the whole system can be studied independentlyThe model can be manipulated in ways the real system can not beComputer can be used to make sophisticated calculationsHow do scientist measure planet distances?Scientists measure the distance between planets using a variety of methods, including triangulation, radial velocity method and scale model method. Scientists use triangulation to determine the distance from Earth to other planets. They observe the planet from two different positions on Earth and use the angles of observation to calculate the planet's distance.
Radial Velocity Method uses the Doppler shift of a planet's light to determine its distance. Scientists can determine how fast a planet is moving towards or away from Earth and use this information to calculate its distance.
Scale model method can be easily visualized and allows for easy comparison between different parts of the system. The model can be easily shared and discussed with colleagues, helping to build consensus and develop a deeper understanding of the system as a whole.
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Is a car slowning down an exaple of acceleration
Answer:
No not at all. A car speeding up is an example of acceleration.
Answer:
No.
Explanation:
Its a example of decceleration because its slowing down not speeding up. If the car were to go faster then it would be an example of acceleration. Hope this helps :)
A spring with a force constant of 3x10^3 Nm-1 is used to measure the mass of an object. If the spring extends by 5cm when the object is hung from it, the mass of the object is
Hello!
When the object is hung from the spring, the force of the spring balances out the force due to gravity. In terms of equations:
\(\Sigma F = F_g - F_s\\\\0 = F_g - F_s\\\\F_s = F_g\)
The force of a spring is equivalent to:
\(F_s = -kx \\\)
k = Spring Constant (3000 N/m)
x = Extension of spring (0.05 m)
**Negative sign means the force is in the opposite direction of the extension. For example, if you pull a spring, the spring force tries to collapse the spring, aka it works against you
The force due to gravity is equivalent to:
\(F_g = mg\)
m = mass (? kg)
g = acceleration due to gravity (9.81 m/s²)
Solving for mass:
\(kx = mg\\\\m = \frac{kx}{g}\\\\m = \frac{3000(0.05)}{9.81} = \boxed{15.29 kg}\)
Which of the following substances is the closest to a neutral pH? O A. milk
Answer:
The answer is water
Explanation:
it has a netural ph of 7.0
why is the only option milk?
The Ph for milk is about 6.5 to 6.7, it varies becauses milks gets sour when it rots.
What happens to a circuit's resistance (R), voltage (V), and current (1) when
you change the thickness of the wire in the circuit?
A. V and I will also change, but R will remain constant.
B. R and I will also change, but V will remain constant.
O C. R, V, and I will all remain constant.
OD. R and V will also change, but I will remain constant.
When you change the thickness of the wire in a circuit, option B. the resistance (R) and current (I) will also change, but the voltage (V) will remain constant.
The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area (thickness). As the thickness of the wire changes, the cross-sectional area changes, which in turn affects the resistance. Thicker wires have a larger cross-sectional area, resulting in lower resistance, while thinner wires have a smaller cross-sectional area, resulting in higher resistance. Therefore, changing the thickness of the wire will cause a change in resistance.
According to Ohm's Law (V = IR), the voltage (V) in a circuit is equal to the product of the current (I) and the resistance (R). If the voltage is kept constant, and the resistance changes due to the thickness of the wire, the current will also change to maintain the relationship defined by Ohm's Law. When the resistance increases, the current decreases, and vice versa.
However, it's important to note that changing the thickness of the wire will not directly affect the voltage. The voltage in a circuit is determined by the power source or the potential difference applied across the circuit and is independent of the wire thickness. As long as the voltage source remains constant, the voltage across the circuit will remain constant regardless of the wire thickness. Therefore, the correct answer is option B.
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he wavelength of blue light is approximately 4.0 x 10 -7 meters. calculate the frequency of blue light in hertz. a. 2.5 x 10 7 b. 1.2 x 102 c. 3.3 x 10 -9 d. 7.5 x 1014 e. 1.2 x 10 1
The frequency of blue light in hertz is d.) 7.5 x 1014.
What is frequency of a light and how is it calculated?
The electromagnetic radiation differs from other radiations through frequency of that wave. Light is one of the forms of electromagnetic radiations. A hertz is said to be the number of oscillations in one second. For a wave, hertz is the number of wavelengths per second. All types of light travels at a same speed irrespective of their frequency.
The equation that relates frequency and wavelength is:
c= fλ
where, c= speed of light
λ = wavelength in meters
f= frequency in hertz
c= 3×10 8 m/s
λ = 4.0 x 10 -7 meters.
f=c/λ
⇒3×10 8 / 4.0 x 10 -7
⇒7.5 x 1014 Hz.
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An atom y has 11 eleven protons 12 neutrons what is the number of electrons in it
Answer:
Electrons = 11
Explanation:
The amount of protons is = to the amount of electrons
What is TRUE about a capitalist society?
The idea behind capitalism is that the free market of products and ideas is owned and driven by private citizens. A capitalist society is a social order in which private property rights and the free market serve as the basis of trade, distribution of goods, and development.
Answer:
In ideal terms: In a capitalist economic system, the owner of production is the individual, and the benefactors of production are first the individual and second the society. In a socialist or communist economic system, the owner of production is the state or the society, and the benefactor is the society.
derive an expression for the force experienced by a conductor carrying current when placed in a uniform magnetic field.
Is the daughter or the science teacher correct? And why?
Answer:
The daughter. I can't really explain but practically, it happens as the daughter has stated.
Which statement best describes how pigments affect what colors humans
see?
Answer:
the component of light reflected by that object
Explanation:
What are real and virsual image explain with the help of examples
Here is your Answer:-
In optics, an image is defined as the collection of focus points of light rays coming from an object. A real image is the collection of focus points made by converging rays, while a virtual image is the collection of focus points made by extensions of diverging rays. In other words, a virtual image is found by tracing real rays that emerge from an optical device (lens, mirror, or some combination) backward to perceived or apparent origins of ray divergences. In diagrams of optical systems, virtual rays are conventionally represented by dotted lines.
Because the rays never really converge, a virtual image cannot be projected onto a screen. In contrast, a real image can be projected on the screen as it is formed by rays that converge on a real location.
Ava runs track and field and is a long-distance runner. She has a big race coming up and needs to eat food that will provide her with enough energy to last throughout the race. What food would be best for her to prepare for her race?
A. salad
B. milk
C. apple
D. pasta
Answer:
A. salad
Explanation:
significant figures: the length and width of a rectangle are 1.125 m and 0.606 m, respectively. multiplying, your calculator gives the product as 0.68175. rounding properly to the correct number of significant figures, the area should be written as
The product of 1.125 m and 0.606 m is 0.68175 m². To properly round to the correct number of significant figures, we need to look at the least precise measurement, which in this case is 0.606 m with three significant figures.
We need to round the product to three significant figures as well. The digit in the third significant figure of the product, which is 1, is less than 5, so we can round down the second significant figure, which is 8. Therefore, the area of the rectangle should be written as 0.682 m². It's important to use the correct number of significant figures when reporting measurements and calculations to ensure accuracy and avoid misleading information.
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How are the schools in Uganda and Minneapolis alike? Select TWO choices. *
1 point
a. Ms. Perry teaches in both.
b. Neither has enough textbooks.
c. Neither has a large enough room.
d. Ms. Perry has a book sale in both.
e. Both have desks for every student.
f. Both are places where students learn
The schools in Uganda and Minneapolis are similar because both are places where students learn and neither has a large enough room.
Similarities between schools in Uganda and MinneapolisDue to poor economic conditions and management, the schools of Uganda and Minneapolis have small rooms in which students sit to learn. Both are the places where students comes to learn and make better their economic condition so we can conclude that option C and F are correct.
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A car drives at a constant speed of 21 m/s around a circle of radius 100m. What is the centripetal acceleration of the car
The centripetal acceleration of the car driving at a constant speed of 21 m/s around a circle with a radius of 100 m is calculated to be 4.41\(m/s^2.\)
To find the centripetal acceleration of the car, we can use the formula:
a = \(v^2\) / r
where "a" represents the centripetal acceleration, "v" is the velocity of the car, and "r" is the radius of the circular path.
Given that the car drives at a constant speed of 21 m/s and the radius of the circle is 100 m, we can substitute these values into the formula to calculate the centripetal acceleration.
a = (21\(m/s)^2\)/ 100 m
a = 441 \(m^2/s^2\)/ 100 m
a = 4.41 \(m/s^2\)
Therefore, the centripetal acceleration of the car is 4.41\(m/s^2.\) This centripetal acceleration represents the inward acceleration that keeps the car moving in a circular path, and its magnitude is determined by the square of the velocity divided by the radius of the circle.
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A current of 0.8 A flows through the motor for 3 minutes. Calculate the total charge in this time.
\(▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪\)
The given terms are :
Current = 0.8 Amperes
Time = 3 minutes = 3 × 60 = 180 seconds
we know that,
\(current = \dfrac{charge}{time} \)now, let's solve for charge (q) :
\(0.8 = \dfrac{q}{180} \)\(q = 180 \times 0.8\)\(q = 144 \: \)Total Charge (q) = 144 Coulombs
what is quietest? ball bearing roller is smoother and quieter quiests silent frictionless pockect door rollers top hung
Ball bearing roller is considered a better option for the pocket doors as compared to the top hung rollers due to reason of friction.
What is friction?Friction is the force defying the relative side(tangential) motion of solid surfaces, fluid layers, or material elements in contact. It's generally subdivided into several kinds. Friction isn't a fundamental force, as it's deduced from electromagnetic force between charged particles, including electrons, protons, atoms, and molecules.
A ball bearing roller is generally considered to be the quietest type of roller for pocket doors. This is because the ball bearings in the roller allow for smooth, low-friction movement, which reduces noise and wear on the door and track. Frictionless or silent pocket door rollers, such as those using a track with a recirculating ball bearing, would also be very quiet. Top hung rollers also have the advantage of not having any contact with the floor and less noise.
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Describe the mathematical relationship between the gravitational
potential energy of an object and its height above a reference point.
Answer:
∆p.e = mg∆h
Explanation:
Take height reference be h1 while height final be h2.
∆h = (h2 - h1)
m = m
g = g
•°• ∆p.e = mg(h2 - h1)
=> ∆p.e = mg∆h
can an object emit different portions of the electromagnetic spectrum at the same time?
Answer:
i don't really know but i think yes sorry if it is wrong
Energy from the sun drives the _ of the water from the ocean surface. As the air moves up the west side of the mountain, the water vapor cools and undergoes _ . The force of gravity causes the _ of the water from the cloud. Choices for the _ are condensation, evaporation, precipitation
Answer: The air is full of water, as water vapor, even if you can't see it. Condensation is the process of water vapor turning back into liquid water, with the best example being those big, fluffy clouds floating over your head. And when the water droplets in clouds combine, they become heavy enough to form raindrops to rain down onto your head.
Explanation:
in three situations, a briefly applied horizontal force changes the velocity of a hockey puck that slides over frictionless ice. the overhead views of the figure indicate, for each situation, the puck’s initial speed vi, its final speed vf, and the directions of the corresponding velocity vectors. rank the situations according to the work done on the puck by the applied force, most positive first and most negative last.
The work done on the Puck by the applied force from the most positive to the most negative is c, b, a respectively.
According to Newton's second law of motion, the force applied to an object is directly proportional to the product of mass and acceleration of the object.
F = ma
\(F= \frac{mv}{t}\)
The force applied to an object increases with increases in the velocity of the object.
In the given diagram, the resultant velocity of the puck is calculated as follows;
Figure a:
\(\Delta v = v_f -v_i\\\\\Delta v = 5 - 6 = - 1 \ m/s\)
Figure b:
\(v = \sqrt{4^2 + 3^2} \\\\v = 5 \ m/s\)
Figure c:
\(\Delta v = 4 - (-2)\\\\\Delta v = 6 \ m/s\)
Thus, the work done on the Puck by the applied force from the most positive to the most negative is c, b, a respectively.
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Petroleum is a non -renewable resource. Therefore, its use needs
to be planned so that present and future use can be adequately met.
Explain how the optimal level of use of petroleum can be
achieved.
Petroleum is a non-renewable resource, which means that it cannot be replenished. Because of this, its usage needs to be planned properly to make sure that there is sufficient availability for present and future needs
The optimal level of use of petroleum can be achieved by several ways which are listed below:
1. Reduce wastage: The optimal level of petroleum use can be achieved by reducing wastage. We should aim to use petroleum products efficiently to minimize wastage and ensure that the resource is not used up too quickly.
2. Develop alternative energy sources: Another way to achieve the optimal level of petroleum use is to develop alternative energy sources. Renewable energy sources like solar, wind, and hydro can be developed to supplement petroleum.
3. Increase efficiency: The third way to achieve the optimal level of petroleum use is to increase efficiency. We can achieve this by improving the efficiency of vehicles and machinery that consume petroleum products.
4. Conservation: Conservation can also help achieve the optimal level of petroleum use. We can conserve petroleum by using it judiciously and avoiding unnecessary use. We can also reduce our reliance on petroleum products by using alternatives like public transport or bicycles.
5. Develop sustainable transportation: Developing sustainable transportation can also help achieve the optimal level of petroleum use. We can develop transportation systems that are more efficient, rely on alternative energy sources, and reduce the amount of petroleum consumed.
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Mr. Rosa’s student has a backpack with a density of 30g/mL. How much mass does the backpack have if it takes up 12.3 cm cubed of space?
Known:
Unknown:
Plug it in:
Answer:
Answer:
m = 369 grams
Explanation:
Given that,
The density of backpack, d = 30 g/mL
The volume of the backpack, V = 12.3 cm³
We need to find the mass of the backpack. The density of an object is given by :
\(d=\dfrac{m}{V}\\\\m=d\times V\\\\m=30\times 12.3\\\\m=369\ g\)
So, the mass of the backpack is 369 grams.