Answer:
The effort distance (also sometimes called the “effort arm”) is shorter than the resistance distance. Mechanical advantage = |Fr/Fe | where | means “absolute value.” Mechanical advantage is always positive.
If an object continues to accelerate, what happens to its speed?
If an object continues to accelerate, the speed of the object will also increase.
What is acceleration?Acceleration is the amount by which a speed or velocity increases (and so a scalar quantity or a vector quantity).
The relationship between acceleration and speed is direct.
If the speed is increasing, the car has positive acceleration. When the car slows down, the speed decreases. The decreasing speed is called negative acceleration
Therefore, as the object continues accelerating, the speed increases.
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How are decompression and how gasses dissolve in liquids related? Explain in your own words.
Three boxes are stacked on top of a cart. As the cart is moving, it comes to an abrupt stop. The boxes fall forward off of the cart. Explain why the boxes fell forward.
Heat can be transferred by conduction when one object is in direct contact with another object. Conduction can occur in solids, liquids, or gases, but it is more effective in A. gases because their particles are moving faster. B. liquids and gases because they occur at higher temperatures. C. liquids because they have a definite volume but not a definite shape. D. solids and liquids because their particles are arranged more closely together.
Answer:
The correct answer is D. solids and liquids because their particles are arranged more closely together.
According to the article, what was the effect of elevation on the experimental group?
Answer:
Due to the effect of elevation on the experimental group the participants decided to try to help the research assistant who was having opening one of her files to finish the study. Schnall, Roper, and Fessler were able to conclude that happiness associated with a feeling of elevation can lead to more altruism or helping behaviors.
Explanation:
100 percent on edge
The effect of elevation on the experimental group was they show more urge of being altruistic and feeling happiness and satisfaction associated with elevation.
Altruism:
It is a practice in which a person help others without any selfishness, the person just want to help.
Witnessing someone's altruistic behavior, make other to feel good and a urge of being Altruistic, this is known as elevation.
After watching elevating Oprah video, the test group help the research assistant who was having trouble in opening file.
Therefore, the effect of elevation on the experimental group was they show more urge of being altruistic and feeling happiness and satisfaction associated with elevation.
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A cat that weighs 4 kilograms is moving at a velocity of 1 m/s. What is the kinetic energy?
The kinetic energy of the cat is 2 joules (J).
The kinetic energy of an object can be calculated using the formula KE = 1/2 * mass * velocity^2.
The kinetic energy of an object can be calculated using the formula:
Kinetic Energy (KE) = 0.5 * mass * velocity^2
In this case, the mass of the cat is 4 kilograms, and its velocity is 1 m/s. Plugging these values into the formula:
KE = 0.5 * 4 kg * (1 m/s)^2
Simplifying the equation:
KE = 0.5 * 4 kg * 1 m^2/s^2
KE = 0.5 * 4 kg * 1
KE = 2 kg
Therefore, the kinetic energy of the cat is 2 joules (J).
Kinetic energy is the energy possessed by an object due to its motion. In this case, the cat's kinetic energy is determined by its mass and velocity. The formula for kinetic energy demonstrates that it is directly proportional to the mass and square of the velocity. As the mass increases, the kinetic energy also increases. Similarly, as the velocity increases, the kinetic energy increases exponentially.
In this example, the cat's kinetic energy is relatively low due to its mass and velocity values. If the cat were moving at a higher velocity or had a greater mass, the kinetic energy would be significantly higher. Kinetic energy is an important concept in understanding the energy associated with moving objects and is utilized in various fields such as physics, engineering, and sports science.
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Using something as a medium of exchange in transactions (money)
We can use currency as a medium of exchange in transactions because of its easy availability.
What is the basic medium of exchange for transaction?Currency is the most common medium of exchange accepted as a standard by all parties for settling economic transactions because every region or country has its specific type of currency in which they do transactions and carried out their economic activities world wide. Currency is also considered as a medium of exchange for goods and services. It is money that is present in the form of paper and coins which is issued by a government. Currency is generally accepted because of high value as a method of payment. U.S. dollars ($), euros (€), Japanese yen (¥), and pounds sterling (£) are the examples of currencies of different countries around the world.
So we can conclude that We can use currency as a medium of exchange in transactions because of its easy availability.
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The image below shows sound waves traveling through air.
Which point is the source of the sound?
The point on the image that is the source of the sound / sound waves travelling would be B. 2.
Where do sound waves originate ?When a sound is produced, such as a musical note or spoken word, it initiates a disturbance at the source, which sets the surrounding particles in motion. As these particles oscillate back and forth, they generate regions of compression and rarefaction, resulting in the formation of longitudinal waves.
The propagation of sound waves emanates from a central source, radiating outward in a spherical pattern, thereby creating an expanding wavefront. This fundamental principle of wave behavior stems from the point-source nature of sound waves, wherein they originate from a central locus and disperse in all directions.
This central source in the image is 2.
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g a mass of 1.3 kg is pushed horizontally against a massless spring with a spring constant of 58 n/m until the spring compresses 19.5 cm if the mass is then released what is the kinetic energy of the mass when it is no longer in contact with the spring ignore friction
Answer: \(1.102\ J\)
Explanation:
Given
Mass \(m=1.3\ kg\)
Spring constant \(k=58\ N/m\)
Compression in the spring \(x=19.5\ cm\ or\ 0.195\ m\)
When the mass leaves the spring, the elastic potential energy of spring is being converted into kinetic energy of mass i.e.
\(\Rightarrow \dfrac{1}{2}kx^2=\dfrac{1}{2}mv^2\\\\\Rightarrow \dfrac{1}{2}\cdot 58\cdot (0.195)^2=\dfrac{1}{2}mv^2\\\\\Rightarrow \dfrac{1}{2}mv^2=1.102\ J\)
The kinetic energy of the mass is 1.102 J.
A 1.53-kg piece of iron is hung by a vertical ideal spring. When perturbed slightly, the system is moves up and down in simple harmonic oscillations with a frequency of 1.95 Hz and an amplitude of 7.50 cm. If we choose the total potential energy (elastic and gravitational) to be zero at the equilibrium position of the hanging iron, what is the total mechanical energy of the system
Answer:
E = 0.645J
Explanation:
In order to calculate the total mechanical energy of the system, you take into account that if the zero of energy is at the equilibrium position, then the total mechanical energy is only the elastic potential energy of the spring.
You use the following formula:
\(E=U_e=\frac{1}{2}kA^2\) (1)
k: spring constant = ?
A: amplitude of the oscillation = 7.50cm = 0.075m
The spring constant is given by:
\(f=\frac{1}{2\pi}\sqrt{\frac{k}{m}}\)
\(k=4\pi^2f^2m\) (2)
f: frequency of the oscillation = 1.95Hz
m: mass of the piece of iron = 1.53kg
You replace the expression (1) into the equation (2) and replace the values of all parameters:
\(E=\frac{1}{2}(4\pi^2f^2m)A^2=2\pi^2f^2mA^2\\\\E=2\pi^2(1.95Hz)^2(1.53kg)(0.075m)^2=0.645J\)
The totoal mechanical energy of the system is 0.645J
PLEASE, PLEASE, PLEASEE!!!
EXPLAIN IN DETAIL HOW THE TWO RELATES TO THE CELL THEORY
The following lists components of the nature of science. Explain how at least two of these are related to the cell theory:
Scientific knowledge is durable yet subject to change
Science is a social activity
The foundation of biology is modern cell theory, which is a commonly recognized explanation of the relationship between cells and living things.
When scientific knowledge lasts a long time, what does that mean?Because it has been independently verified by numerous scientists working together, scientific knowledge is regarded as lasting. Independent researchers utilize the scientific method to generate factual data and knowledge that adds to the body of knowledge in their subject.
What does social science know scientifically?A generalized collection of laws and hypotheses developed using the scientific method and intended to explain a phenomenon or behavior of interest is referred to as scientific knowledge. Theories are methodical explanations of the underlying phenomenon or behavior, whereas laws are recognized patterns of occurrences or behaviors.
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A spring with spring constant 120 N/m and unstretched length 0.4 m has one end anchored to a wall and a force F is applied to the other end.
Required:
a. If the force F does 250 J of work in stretching out the spring, what is its final length?
b. If the force F does 250 J of work in stretching out the spring, what is the magnitude of F at maximum elongation?
(a) The work done by F in stretching the spring a distance x is
W = 1/2 (120 N/m) x ²
so F performs 250 J of work on the spring, then
250 J = 1/2 (120 N/m) x ² ==> x ² ≈ 4.17 m² ==> x ≈ 2.04 m
(b) In order for F to perform 250 J of work, its magnitude must be
F = (120 N/m) (2.04 m) ≈ 245 N
How can you describe the motion of an object in a race?
Explain what occurs to satellites when they travel too fast and too slow to keep in orbit
If the satellite goes too slow:
It will crash into it's surrounding things it's orbiting.It would not go forward enough due to pull of gravity.Gravity will pull it back to Earth.The satellite could be knocked or moved closer or farther from the object it is orbiting.If the satellite goes too fast:
It will eventually fly away.It can go forward soo fast.It would go too fastly that gravity can't retain in an orbit.The satellite's inertia would carry it off into space.What are some ways the government can help reduce greenhouse gases?
Answer:
Switching power plants, for example, from coal-burning to gas-burning can significantly reduce emissions. Equip fossil fuel plants with carbon capture and storage technology. ... Although it doesn't exactly reduce emissions, carbon capture technology does prevent emissions from reaching the atmosphere.
Lauren feels a cold coming on, and her friend recommends taking a high dose vitamin C supplement. But Lauren isn't just taking her friend's word for it. Before she takes a supplement, she wants to at least be sure it's safe. Which of the following DRI values would assist Lauren in determining the highest amount of the supplement that would be safe for her to consume? Estimated Average Requirement (EAR) Acceptable Macronutrient Distribution Range (AMDR) Recommended Dietary Allowance (RDA) Tolerable Upper Intake Level (UL)
The term "tolerable upper intake level" (UL) refers to the maximum daily food intake that is most likely to not put almost all members of the general population at risk for negative health impacts.
Which 4 dietary reference intakes are there?
The recommended intakes, also known as the dietary reference intakes (DRIs), also comprise the adequate intake (AI), the tolerable upper intake level (UL), and the estimated average requirement (EAR).
What are the six main dietary requirements?
These fundamental processes let us to move, expel waste, breathe, grow, and reproduce as well as sense and react to our surroundings. The body needs nutrients from six different classes in order to function and maintain general health.
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A body of mass 50 kg explodes and splits into three pieces. The first piece has a mass of 10 kg and a velocity of [-3,2] m/s, the second piece has a mass of 18 kg and a velocity of [5, -4] m/s. What is the velocity of the third piece?
.
The velocity of the third piece 2/11. (13 j - 15i)
What is velocity?Velocity is the directional velocity of a moving object as an indicator of the rate of change of position observed from a particular frame of reference and measured by a particular time standard.Velocity is a vector representation of the displacement an object or particle experiences with respect to time. The standard unit for velocity magnitude (also called velocity) is meters per second (m/s). Alternatively, centimeters per second (cm/s) can be used to express velocity magnitude.Simply put, velocity is the speed at which something moves in a particular direction. For example, the speed of a car traveling north on a highway, or the speed of a rocket after launch.To learn more about velocity from the given link:
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Match each colored row or group on the table to the family of elements it
represents.
red depicts alkali metals, green depicts alkaline earth metals, blue depicts transition metals, and purple depicts inner transition metals.
alkali metal, any of the six chemical elements that make up Group 1 (Ia) of the periodic table—namely, lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).
Group 2A of the periodic table are the alkaline earth metals: beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). They are harder and less reactive than the alkali metals of Group 1A.
transition metal, any of various chemical elements that have valence electrons—i.e., electrons that can participate in the formation of chemical bonds—in two shells instead of only one.
The period 6 inner transition metals (lanthanides) and period 7 are actinides.
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water fall,agile,hybrid models
Agile-Waterfall hybrid method
As defined by Erick Bergmann and Andy Hamilton, the Agile-Waterfall hybrid typically allows teams developing software to work within the Agile methodology, while hardware development teams and product managers stick to the Waterfall approach.
15 to who helps me out!
Answer:
a. same
b. less
c. same
d. same?
Explanation:
the mass will always be the same no matter where it is. the weight however depends on the gravity.
The pressure in car tires is often measured in pounds per square inch (lb/in.2lb/in.2), with the recommended pressure being in the range of 25 to 45 lb/in.2lb/in.2. Suppose a tire has a pressure of 25.5 lb/in.2lb/in.2 . Convert 25.5 lb/in.2lb/in.2 to its equivalent in atmospheres. Express the pressure numerically in atmospheres.
Answer:
25.5 pounds per square inch are equivalent to 1.735 atmospheres.
Explanation:
An atmosphere equals 14.695 pounds per square inch. We find the equivalent of given pressure in atmospheres by means of simple rule of three:
\(x = 25.5\,\frac{lb}{in^{2}} \times \frac{1\,atm}{14.695\,\frac{lb}{in^{2}} }\)
\(x = 1.735\,atm\)
25.5 pounds per square inch are equivalent to 1.735 atmospheres.
Three 7Ω resistors are connected in series across a 10 V battery. What is the equivalent resistance of the circuit?
ANSWER:
21Ω
STEP-BY-STEP EXPLANATION:
Given:
R1 = R2 = R3 = 7Ω
The resistance in a series circuit has the following equation
\(R_{eq}=R_1+R_2\ldots+R_n\)We replacing in this case:
\(\begin{gathered} R_{eq}=R_1+R_2+R_3 \\ R_{eq}=7+7+7 \\ R_{eq}=21\Omega \end{gathered}\)The equivalent resistance of the circuit is 21Ω
In physics, a is a group of related objects that interact with each other and form a complex whole.
Answer: a system
Explanation: just did the test
Answer:
system is correct
Explanation:
A capacitor is charged to a potential of 12.0 V and is then connected to a voltmeter having an internal resistance of 3.40 MΩ. After a time of 4.00 s, the voltmeter reads 3.0 V.
A) What are the capacitance?
B) What is the time constant of the circuit?
Answer:
a. 0.849 micro farad
b. 2.89 s
Explanation:
a) V=V0 e^-t/RC
3=12*e^-4/3.4*10^6*C
3/12=e^-4/3.4*10^6*C
-1.3863 =-4/3.4*10^6*C
C=8.49*10^-7 F
=0.849 micro farad
B) time constant= R*C
=3.4*10^6*8.49*10^-7
=2.89 S
a. The capacitance is 0.849 micro farad
b. The time constant of the circuit is 2.89 s
Calculation of capacitance & time constant:a)
We know that
V=V0 e^-t/RC
3=12*e^-4/3.4*10^6*C
3/12=e^-4/3.4*10^6*C
-1.3863 =-4/3.4*10^6*C
C=8.49*10^-7 F
=0.849 micro farad
B)
Now
time constant= R*C
=3.4*10^6*8.49*10^-7
=2.89 S
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The brakes of a car are applied to give it an acceleration of -2m/s^2. The car comes to a stop in 3s. What was its speed when the brakes were applied?
Answer:
So if its acceleration is -2m/s^2 that means every second the initial velocity would be subtracted by 2. So since it took 3 seconds 2*3=6. The initial velocity was 6 m/s
How many times does the kinetic energy of a car increase when traveling 60 mph as opposed to traveling 15 mph?
K.E. increases
5
4
16
20
Answer:
20
Explanation:
i'm not so sure with my answer
help pls!!
Fig above shows a wave traveling through a medium. Use the fig to answer the questions below.
A) What is the amplitude of the wave ? Include correct units.
B) Use the graph to determine the time of one wave. Use it to find the frequency.
C) If the speed of the wave is 25 cm/s, what is the wavelength of the wave ? Show data listing, equation , substitution leading to the answer for full credit.
(a) The amplitude of the wave is determined as 8 cm.
(b) The period of the wave motion is 20 s and the frequency of the wave is 0.05 Hz
(c) The wavelength of the wave is 500 cm.
What is the amplitude of the wave ?(a) The amplitude of the wave is the maximum displacement of the wave.
from the graph, amplitude of the wave = 8 cm
(b) The period of the wave motion is calculated as;
T = 20 s
The frequency of the wave = 1/T = 1/20 s = 0.05 Hz
(c) The wavelength of the wave is calculated by applying the following wave formula.
λ = v / f
λ = 25 cm/s / 0.05 Hz
λ = 500 cm
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The reliability or reproducibility of a measurement is its _____
The degree of data stability when the measurement is replicated under identical circumstances is known as reproducibility or reliability.
What exactly are repeatability and reproducibility?Reproducibility determines how an entire study an experiment can be replicated, whereas repeatability assesses the variation in data made by a single equipment or human under similar circumstances.
What makes repeatability crucial?Science needs reproducibility because it enables more in-depth investigation, and replication validates our findings. There are several investigations and experiments, which result in a wide range of variables, unforeseen, and things that are either outside your influence or you cannot guarantee.
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which of the following has the greatest inertia ping pong ball, golf ball, softball, and a bowling ball
Answer:
bowling ball
Explanation:
A bowling ball has more mass than the others, thus having more inertia.
Describe the relationship between frequency and wavelength of the visible light spectrum?