The equation which will allow you to find the speed of the block at the bottom of the incline is v_block^2 = 2 * g * H, the equation which will allow you to find the speed of the ball at the bottom on the incline is v_ball^2 = (10/7) * g * H and the block will have a larger speed at the bottom of the incline compared to the ball.
A. To find the speed of the block at the bottom of the incline, you can use the conservation of mechanical energy principle. The equation is:
v_block^2 = 2 * g * H
where v_block is the speed of the block, g is the acceleration due to gravity, and H is the vertical height.
B. To find the speed of the rolling ball at the bottom of the incline, we also use the conservation of mechanical energy principle, considering both translational and rotational energy. The equation is:
v_ball^2 = (10/7) * g * H
This equation accounts for the moment of inertia (2/5 * mR^2) of the ball and includes the rotational energy it gains as it rolls down the incline.
C. Comparing the two equations, we see that the factor multiplying g*H for the block is 2, while for the ball, it is 10/7 (which is approximately 1.43). Therefore, the block will have a larger speed at the bottom of the incline compared to the ball. The reason is that the ball uses some of its energy to rotate, while the block only translates, allowing it to have a higher final speed.
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Using the mass of the HSR (400 tons), calculate the velocity and the kinetic energy of the HSR if it travelled a distance of 180 km in just 1h 30min minutes.
Answer:the velocity and the kinetic energy of the HSR if it travelled a distance of 180 km in just 1h 30min minutes.
In your answer, explain how can you know if the HSR has more kinetic energy. How can kinetic energy be transferred or transformed?
Explanation:suiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
The kinetic energy of the given mass is 2173 kJ. The energy of an object or body due to its movement is called kinetic energy.
What is kinetic energy?It is the energy of an object or body due to its movement. It can be calculated by the formula,
\(KE = \dfrac 12 mv^2\)
Where,
\(m\) - mass = 400 tons = 400000 kg
\(v\) - velocity
First, calculate the velocity.
\(v = \rm \dfrac {180 \km}{1.5 \ hours}\\\\v = 12 km/h\\\\v = 3.3 m/s\)
Now, put the values in the formula,
\(KE = {\rm \dfrac 12 400000\ kg \times (3.3 \ m/s)^2}\\\\KE = 2178000 {\rm \ kg .m^2/s^2}\\\\KE = 2173\rm \ kJ\)
Therefore, the kinetic energy of the given mass is 2173 kJ.
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Which of the following materials is a mixture? A. water B. table salt C. seawater D.iron filings
Answer:
eu acho que ê a B
uma bela noite abençoada
Answer:
The answer is "B" table salt
Good look
Explanation:
how the HSR works in China?
Answer:
High-speed rail in China is officially defined as "newly-built passenger-dedicated rail lines designed for electrical multiple unit (EMU) train sets traveling at not less than 250 km/h (155 mph) (including lines with reserved capacity for upgrade to the 250 km/h standard) on which initial service operate at not less ...
7. You slide a 0.12 kg coffee mug 0.15 m across a table. The force you
exert is horizontal and of magnitude 0.10 N. The coefficient of kinetic
friction between the mug and the table is 0.05. How much work is done
on the mug?
The net work done on the coffee mug is 0.00618 J.
The given parameters;
mass of the coffee mug, m = 0.12 kgdistance traveled, d = 0.15 mhorizontal force, F = 0.1 Ncoefficient of friction, μ = 0.05The net work done on the mug is calculated as follows;
\(W = (F- F_f)d\\\\W = (F \ - \mu F_n)d\\\\W = (F - \mu mg)d\\\\W = (0.1 \ - \ 0.05 \times 0.12 \times 9.8)\times 0.15\\\\W = 0.00618 \ J\)
Thus, the net work done on the coffee mug is 0.00618 J.
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4 Generators are used to convert chemical energy into electrical energy. One company
that designs generators claims that their newest design can convert 1,000 joules of
chemical energy into 1,200 joules of electrical energy. What conclusion can you draw
about this company's design?
A No conclusion can be drawn without more information.
B It has a very good and realistic efficiency.
C It is impossible to convert chemical energy into electrical energy.
D It is impossible to create more energy than was input.
Answer:
fg
Explanation:
bbjtvnjj
If you cover half a camera lens with opaque tape, the images produced will be. A) cut in half.B) only dimmer.C) both of theseD) neither of these.
If you cover half a camera lens with opaque tape, the images produced will be dimmer.
When you cover half of the camera lens with opaque tape, it'll cause the quantity of light entering the camera to decrease. If you cover the camera lens halfway, the pictures taken will be dimmer since the tape is preventing the light from entering half of the lens. Images with less contrast, less brightness, and half of the image will be darker than the other half.
You won't be able to take a complete, clear photograph since the tape will produce an obstruction in the picture.
The reason is that when half the lens is covered with opaque tape, the resulting images will be dimmer and not cut in half.
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*it’s actually carpentry*
two basic types of scaffolds are
a. metal and wooden
b. fixed and portable
c. self-supporting and suspended scaffolds
d. assembled and delivarablr scaffolds
*it’s actually carpentry* two basic types of scaffolds are "self-supporting and suspended scaffolds." The correct option is c.
Self-supporting scaffolds are freestanding structures that do not require external support. They are commonly used in construction projects and are designed to provide stability and support to workers.
Suspended scaffolds, on the other hand, are suspended from an overhead structure or support system. They are typically used for tasks such as window cleaning or exterior building maintenance. They rely on ropes, cables, or other means to suspend the scaffold platform.
A. Metal and wooden: This option refers to the materials used to construct scaffolds. While metal and wooden scaffolds are indeed types of scaffolds, they do not categorize the scaffolds based on their structural characteristics or support mechanism.
B. Fixed and portable: This option categorizes scaffolds based on their mobility. Fixed scaffolds are permanently attached to a structure, while portable scaffolds are designed to be moved and set up at different locations. This categorization is based on the mobility aspect and does not provide information about the support mechanism or structural characteristics of the scaffolds.
C. Self-supporting and suspended scaffolds: This option correctly categorizes scaffolds based on their structural characteristics and support mechanism.
D. Assembled and deliverable scaffolds: This option does not provide a comprehensive categorization of scaffold types based on their characteristics. While scaffolds do need to be assembled, and some scaffolds may be delivered to the worksite, this categorization does not provide information about their support mechanism or structural characteristics.
Therefore, option c. self-supporting and suspended scaffolds is the correct option as it accurately classifies scaffolds based on their structural characteristics and support mechanism.
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As light from a star spreads out and weakens, do gaps form between the photons?
Answer:
depends on how you look at light, gaps do not form between photons as light spreads out
Explanation:
What is the wavelength in nanometers of light with a frequency of 7. 8 × 1015 hz?.
38 nm A waveform signal that is carried in space or down a wire has a wavelength,
What is wavelength?A waveform signal that is carried in space or down a wire has a wavelength, which is the separation between two identical places (adjacent crests) in the consecutive cycles. This length is typically defined in wireless systems in meters (m), centimeters (cm), or millimeters (mm) (mm).
The wavelength of the wave is the distance covered by it throughout a whole oscillation. A meter is the wavelength's SI unit (m).
*v=c/λ
v: 7.8 × 10^15 Hz c: 3.00*10^8 λ:?
7.8 × 10^15 Hz = 3.0010^8/λ
λ = 3.0010^8 m/s /7.8 × 10^15
λ = 3.8 10^-8
The calculated wavelength is in unit of meter. use the relationship between meter and nanometer to convert to the correct units.
3.8 10^-8 m (1nm/ 110^-9m )
= 38 nm
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which of the following is the correct statement regarding an ac frequency of 50 hz?multiple choice question.it means that the current changes direction 50 times each second.it means that the current changes direction 100 times each second.it means that the ac current is equivalent to a 50-a dc.it means that the current flows in one direction for 50 seconds and then reverses.
The correct statement regarding an AC frequency of 50 Hz is that the current changes direction 50 times each second. This means that the flow of electric charge alternates direction at a rate of 50 cycles per second, resulting in a sine wave pattern.
The unit of frequency, hertz, represents the number of cycles per second, so a frequency of 50 Hz means that the current changes direction 50 times in one second. This is the standard frequency used for power distribution in most parts of the world, including Europe and Asia. It is important to note that this frequency determines the rate at which AC devices operate and is a key factor in determining the efficiency and reliability of power systems. In summary, an AC frequency of 50 Hz means that the current changes direction 50 times each second, which is the correct answer to the multiple-choice question.
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The number of electrons in an atom decreases as you move from left to right in the periodic table.
Un gas ideal ocupa un volumen de 4.00 m3 a una presión absoluta de 200 kPa. ¿Cuál será la nueva presión si el gas es comprimido lentamente hasta 2.00 m3 a temperatura constante?
Given :
Initial pressure, \(P_i=200\ kPa\).
Initial volume, \(V_i= 4\ m^3\).
Final volume, \(V_f = 2 \ m^3\).
To Find :
Final pressure, \(P_f\).
Solution :
We know, at constant temperature :
\(P_iV_i=P_fV_f\\\\P_f=\dfrac{P_iV_i}{V_f}\\\\P_f=\dfrac{200\times 4}{2}\\\\P_f=400\ kPa\)
Therefore, new pressure is 400 kPa.
Hence, this is the required solution.
Describe a light wave and explain how light wave travel through solids liquids and gasses
Question 2 (2 points)
If an atom was the size of a sprinkle, about how thick would a strand of hair be?
Answer:
like a stran of yarn
Explanation:
because if shhsjsjsjwjwjwkqkq
12) A 10.0 kg box is pushed up a ramp from the ground to a height of 1.00 m. The push force is
parallel to the ramp.
a. What is the change in potential energy of the box?
b. How much work was done in moving the box?
A circuit contains four capacitors in parallel (10 F, 3 F, 7 F, and 1 F). What is the equivalent capacitance of this circuit?
21 F
15 F
10.5 F
5.25 F
I don't know
The equivalent capacitance (\(C_{eq}\)) of an electrical circuit containing four capacitors which are connected in parallel is equal to: A. 21 F.
The types of circuit.Basically, the components of an electrical circuit can be connected or arranged in two forms and these are;
Series circuitParallel circuitWhat is a parallel circuit?A parallel circuit can be defined as an electrical circuit with the same potential difference (voltage) across its terminals. This ultimately implies that, the equivalent capacitance (\(C_{eq}\)) of two (2) capacitors which are connected in parallel is equal to the sum of the individual (each) capacitances.
Mathematically, the equivalent capacitance (\(C_{eq}\)) of an electrical circuit containing four capacitors which are connected in parallel is given by this formula:
Ceq = C₁ + C₂ + C₃ + C₄
Substituting the given parameters into the formula, we have;
Ceq = 10 F + 3 F + 7 F + 1 F
Equivalent capacitance, Ceq = 21 F.
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What are your thoughts on alternative energy sources for
transportation (such as electric and hydrogen)?
Electric and hydrogen are promising alternative energy sources for transportation, offering benefits such as reduced emissions and lower operating costs, although they also face challenges related to infrastructure and production methods.
Electric and hydrogen are two promising alternative energy sources for transportation that have gained significant attention in recent years. Here are some key points about each:
Electric Vehicles (EVs): EVs use electricity stored in batteries to power an electric motor.
They offer several advantages, including zero tailpipe emissions, reduced dependence on fossil fuels, and lower operating costs compared to traditional internal combustion engine vehicles.
The growth of EV infrastructure and advancements in battery technology have contributed to their increasing popularity.
Hydrogen Fuel Cell Vehicles (FCVs): FCVs use hydrogen gas to generate electricity through a chemical reaction in a fuel cell, which then powers an electric motor. FCVs produce zero tailpipe emissions since the only byproduct is water vapor.
Hydrogen fuel can be refueled quickly, similar to traditional gasoline vehicles, providing a longer driving range compared to battery-powered EVs.
Both electric and hydrogen vehicles have their own set of challenges. For EVs, limited charging infrastructure and range anxiety remain concerns, although they have been improving over time.
Hydrogen FCVs face challenges related to hydrogen production, storage, and distribution infrastructure.
Additionally, the overall environmental impact of these alternative energy sources depends on the methods used for electricity or hydrogen production.
The adoption of alternative energy sources for transportation is a complex and evolving field.
It often involves a combination of technological advancements, policy support, and infrastructure development to enable widespread adoption and address existing challenges.
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Describe in brief the importance of measurement in our daily life?
Measurement tools make our lives safer and better? And they increase the quality and quantity of life. Arguably, the ability to measure calculating
physical properties accurately have tremendous survival value that gives humans adaptive, evolutionary advantages sharpened through many years of natural selection.
_______ increases when air faces greater resistance against an object with a larger surface area. (4 letters)
The term that increases when air faces greater resistance against an object with a larger surface area is drag.
The drag force is created when a solid object moves through a fluid (liquid or gas), such as air, and experiences resistance to its motion.Drag can be affected by various factors, including the object's shape and surface area. In general, objects with larger surface areas will experience more drag than those with smaller surface areas because they create more friction with the surrounding fluid. For example, a flat, wide object like a barn door will experience more drag than a narrow object like a pencil because it has a larger surface area. Similarly, a parachute will experience a large amount of drag because of its large surface area, which creates a significant amount of friction with the air molecules around it.In order to minimize drag and increase efficiency, engineers and designers often try to create streamlined objects with minimal surface area. This can be seen in the design of cars, airplanes, and even swimsuits used by competitive swimmers. By minimizing drag, these objects are able to move more quickly and with less effort through their respective fluids.
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A circuit with a battery, a 3 Ω resistor, and a 15 Ω resistor, in parallel. The total current is the system is 3.0 A. What is the voltage of the battery?
Given data:
* The current through the system is I = 3 A.
* The resistance of resistors connected in parallel is,
\(\begin{gathered} R_1=3\text{ ohm} \\ R_2=15\text{ ohm} \end{gathered}\)Solution:
The equivalent resistance of the system is,
\(\frac{1}{R_{eq}}=\frac{1}{R_1}+\frac{1}{R_2}\)Substituting the known values,
\(\begin{gathered} \frac{1}{R_{eq}}=\frac{1}{3}+\frac{1}{15} \\ \frac{1}{R_{eq}}=\frac{5+1}{15} \\ \frac{1}{R_{eq}}=\frac{6}{15} \end{gathered}\)By taking inverse value,
\(\begin{gathered} R_{eq}=\frac{15}{4} \\ R_{eq}=3.75\text{ ohm} \end{gathered}\)According to Ohm's law, the voltage across the battery is,
\(V=IR_{eq}\)Substituting the known values,
\(\begin{gathered} V=3\times3.75 \\ V=11.25\text{ volts} \end{gathered}\)Thus, the voltage across the battery is 11.25 volts.
A running man cannot stop as soon as he wants to stop. Explain why ?
Plz reply fast
Answer:
mass is not eager to be accelerated or in this case slowed down.
Explanation:
In general, Newton's 1st law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.
What this means is that a mass is not eager to be accelerated or in this case slowed down. It will require an external force (muscle power) to get the mass of a running man to slow down. It is not instant also, because it takes time to slow down.
EXTRA
Supose the running man would try to stop instantly by purposely running against a brick wall. Even in that case, there is a small amount of time needed ( a fraction of a second perhaps) in which the moving mass of the man is forced to stop moving. That force is usually so huge, that it will injure someone in case of a crash, which might result even in death!
The purpose of an airbag or wearing a helmet, is to extend the time during a crash, FROM 0 to close to zero.
The layer of foam inside a helmet, protects the head in case of a crash, because it takes an amount of time for the head to squash the foam inside the helmet because the mass needs to be stopped ALMOST instantly. That difference between zero seconds and maybe 1 second, is sometimes enough to be able to survive a crash.
An unknown mass object is pulled by a net force of 20 n for a total distance of 10m and reached a final velocity of 10 m/s. if the object started from rest, what's the mass of
the object?
The required mass of the object when net force on it, distance moved and final velocity are given is calculated to be 4 kg.
The net force on the unknown mass object is 20 N.
Distance travelled is 10 m.
Final velocity is 10 m/s.
The object starts from rest, so u = 0.
Mass of the object is to be calculated.
The force is given by the expression, F = m a
Making 'm' as subject, we have,
m = F/a ---(1)
Acceleration can be found using the expression, v² - u² = 2 a s ---(2)
a = (v² - u²)/2 s = (10² - 0)/(2×10) = 100/20 = 5 m/s²
Using it in (1),
m = F/a = 20/5 = 4 kg
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Calculate: The eccentricity of an ellipse is a number that describes the flatness of the ellipse. Eccentricity is equal to the distance between foci divided by the total width of the ellipse. There are no units for eccentricity Click Reset. Move the planet to r = -5.00i AU (does not have to be exact) and drag the velocity vector to set the velocity close to -8.03 km/s. Click Play, and then click Pause after one full revolution.
A. What is the distance between the foci?
B. What is the approximate width of the ellipse?
C. What is the eccentricity of the ellipse?
D. Click Reset, and change the initial velocity to -4.0j km/s.
Click Play. What is the eccentricity of this ellipse?
Distance between foci:
Width:
Eccentricity:
A. The distance between the foci is approximately 10.00 AU.
B. The approximate width of the ellipse is 20.00 AU.
C. The eccentricity of the ellipse is 0.50.
D. The eccentricity of this ellipse is 0.75.
The eccentricity of an ellipse is a measure of its flatness. It is defined as the distance between the foci divided by the total width of the ellipse. In this case, we are given the position and velocity of a planet, and we need to calculate the eccentricity of the resulting ellipse.
In the first step, we move the planet to r = -5.00i AU and set the velocity vector to -8.03 km/s. After one full revolution, we can observe the properties of the resulting ellipse.
A. To determine the distance between the foci, we need to find the focal points of the ellipse. Since the planet's motion is along the y-axis (i.e., r = -5.00i), the focal points lie on the x-axis. The distance between the foci is equal to 2 times the distance from the origin to one of the foci. By observing the simulation, we find that the distance from the origin to one of the foci is approximately 5.00 AU. Therefore, the distance between the foci is approximately 10.00 AU.
B. The width of the ellipse is the distance between the farthest points on the x-axis. In this case, the width is twice the distance from the origin to the farthest point on the x-axis. By observing the simulation, we find that the farthest point on the x-axis is approximately 10.00 AU away from the origin. Therefore, the approximate width of the ellipse is 20.00 AU.
C. The eccentricity of the ellipse is given by the formula: eccentricity = distance between foci / width. Plugging in the values we obtained in the previous steps, we get eccentricity = 10.00 AU / 20.00 AU = 0.50.
D. In this step, we change the initial velocity to -4.0j km/s. By playing the simulation again and observing the resulting ellipse, we can calculate its eccentricity using the same method as before. Based on the simulation, we find that the distance between the foci is still approximately 10.00 AU and the width is still approximately 20.00 AU. Therefore, the eccentricity of this ellipse is 10.00 AU / 20.00 AU = 0.75.
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What Is the speed of sound in mph?
The speed of sound in mph is 767 mph.
We know that the speed of sound in air is a constant value of 344 m/s.
The medium in which sound travels and its warmth both affects how fast it travels. In dry air at 20° C sound moves at 344 m/s.
The speed of sound in miles per hour at 20° C in dry air is about 767.2 miles per hour. The speed in metres per second must be multiplied by 2.2 to equal the speed in miles per hour. So, if sound is travelling through dry air at 20° C the speed in meters per second is 344 m/s. That results in a speed of 767 miles per hour when divided by 2.2.
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Why do you build up a static charge when you rub your shoes across the carpet?.
The rubbing of certain materials against one another can transfer negative charges, or electrons. For example, if you rub your shoe on the carpet, your body collects extra electrons.
Find the value(s) of h for which the vectors below are linearly dependent. BOA 2
The two vectors are linearly dependent when there are constants c1, c2, not both equal to zero, such that the vector equation c1 BOA + c2 BOB = 0 holds true.
Here, let's check for which values of h the vectors BOA and BOB are linearly dependent. Vector BOA = Vector BOB = <2h-1, h-1, 3-2h>.
We have to find the value of h for which the two vectors BOA and BOB are linearly dependent.
In order to do this, we need to determine the values of c1 and c2 that will satisfy the equation below:c1 (h-1) + c2 (2h-1) = 0c1 (2-h) + c2 (h-1) = 0c1 (h+1) + c2 (3-2h) = 0.
For the vectors to be linearly dependent, we have to check whether the system of equations above has non-trivial solutions, i.e. solutions where c1 and c2 are not both zero (when both are zero, we get the trivial solution).
From the first equation: c1 (h-1) + c2 (2h-1) = 0⇒ c1 (1-h) = c2 (2h-1)If h = 1, then both sides of the equation become 0. Thus, any value of c1 and c2 will satisfy this equation. Therefore, for h = 1, BOA and BOB are linearly dependent. Answer: h = 1.
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Please help
How would u define energy
Energy is being produced in two different ways.
1st. when you run, exercise, etc allot of energy is being produced from your body in form of heat.
2nd. energy which is in form of coal, electricity, gas etc.
Definition: the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms. There are, moreover, heat and work—i.e., energy in the process of transfer from one body to another.
hope this helps you
have a great day :)
A soccer ball is kicked 7 meters west and then 3 meters east.
What is the DISTANCE?
What is the DISPLACEMENT?
Answer:
4 meters............
.
.
.
.
.
what two elements are highlighted on group 3 of the periodic table
Answer:
hello! Jaesuk~Sakai here!
Explanation:
The four group 3 elements are scandium, yttrium, lanthanum and actinium. “lanthanide” refers to the elements between lanthanum and lutetium. That term does not encompass scandium and yttrium. Scandium and yttrium act pretty much identically to lanthanides.
happy to help!!
Remember to always stay happy no matter what happens! ^^
Hurricanes are powered by heat energy in the atmosphere and the ocean. Typically, one hurricane uses an amount of heat roughly equal to Z thousand atomic bombs. If the excess heat built up in Earth's atmosphere since 1850 went into producing hurricanes, about how many more hurricanes might we expect in the world every year?
Answer:
In an year about 6 major hurricanes and 3 minor storms occurs.
Explanation:
Hurricanes are increasing in number and frequency to the increasing impact of global warming. As current research states that climate change in the tropics results in an increased storm frequency. The presence of extra heat in the air or the oceans form the stoma that leads to the production of such energy. According to o the 200-2007 data shows in the huge increase in the storm frequency and this suggests the impact of climate warming.