If an additional stimulus, equal in intensity to the first, is applied to the muscle at the 60-millisecond (ms) time point, it will result in a second contraction of the muscle before the first contraction has relaxed. The addition of a second stimulus before the muscle has completely relaxed is referred to as wave summation, temporal summation, or the staircase effect.
This process is known as summation because the second contraction adds to the force generated by the first contraction, resulting in a stronger contraction in total than the first. When a series of stimuli are delivered to a muscle in quick succession, the force generated by the muscle steadily increases as each new stimulus causes a stronger contraction to be added to the previous contraction.
Wave summation can occur when the time between the two stimuli is short enough that the muscle has not completely relaxed from the first contraction. If the stimuli are delivered too close together, the muscle can go into tetanus, a state of sustained contraction where the muscle is unable to relax. In conclusion, wave summation is a physiological phenomenon that causes an increase in muscle tension with each subsequent stimulus applied before the muscle has had the opportunity to completely relax.
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A Ford Shleby GT 500 has a horsepower of 760 hp. What is that is Watts? DO NOT include units - just the numeric answer. I QUESTION 15 An object of mass 100 kg is moved with an acceleration of 10 m/2, and goes fron an initial position of 10 m to a final position of 30 m. What work was done on the object? DO NOT include units - just the numeric answer.
the work done on the object is 20000 J.
The conversion factor from horsepower to watts is 1 hp = 746 watts.
Therefore, the Ford Shelby GT 500's horsepower of 760 hp can be converted to watts as follows:
760 hp × 746 watts/hp = 567760 watts
To convert horsepower to watts, you simply need to multiply the number of horsepower by the conversion factor of 746 watts/hp.So, the numeric answer for 760 hp in watts is 567760.
According to the work-energy principle, the work done on an object is equal to the change in kinetic energy. Mathematically, the work-energy principle can be represented as follows:
W = ΔKHere, W represents the work done on the object, and ΔK represents the change in kinetic energy of the object.
The change in kinetic energy can be calculated using the following formula:
ΔK = (1/2)mvf² - (1/2)mvi²
Here, m represents the mass of the object, vi represents the initial velocity of the object, and vf represents the final velocity of the object. In this case, the object is initially at rest (vi = 0), so the formula can be simplified to
:ΔK = (1/2)mvf²
Now, we can use the following kinematic equation to calculate the final velocity of the object:
vf² = vi² + 2ax
Here, a represents the acceleration of the object, x represents the displacement of the object, and vi represents the initial velocity of the object. Plugging in the given values, we get:
vf² = 0 + 2(10 m/s²)(30 m - 10 m)vf² = 400 m²/s²vf = 20 m/s
Now, we can plug in the values of m and vf to calculate the change in kinetic energy:
ΔK = (1/2)(100 kg)(20 m/s)²ΔK = 20000 JSo, the numeric answer for the work done on the object is 20000 J.
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a surface has an area vector given by (4ˆı 3ˆ 2ˆk) m2 . it is placed in a uniform electric field of (2ˆı − 1ˆ) n/c. how much electric flux passes through this surface?
The electric flux passing through the surface is 8 Nm²/C.
To calculate the electric flux passing through the surface, you need to take the dot product of the area vector and the electric field vector. The area vector is given by (4î, 0, 2k) m² and the electric field vector is given by (2î, -1j) N/C.
To find the dot product, you multiply the corresponding components and sum them up:
Flux = (4î • 2î) + (0 • -1j) + (2k • 0)
Flux = (8) + (0) + (0)
Flux = 8 Nm²/C
So, the electric flux passing through the surface is 8 Nm²/C.
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1. A 60-Hz, single-phase source with V = 277 ∠0o volts is applied to a circuit element. (a) Determine the instantaneous source voltage. Also determine the phasor and instantaneouscurrents entering the positive terminal if the circuit element is (b) a 30-resistor, (c) a 15-mH inductor, (d) a capacitor with 100mF.
(a) The instantaneous source voltage can be determined by using the given magnitude and phase angle. Since the phase angle is 0°, the instantaneous source voltage can be written as:
V(t) = 277 * cos(2π * 60 * t)
(b) For a 30-Ω resistor, the current entering the positive terminal is the same as the source current. Since the voltage and resistance are given, we can use Ohm's law to determine the current:
I(t) = V(t) / R = (277 * cos(2π * 60 * t)) / 30
(c) For a 15-mH inductor, the phasor current can be determined using the formula:
I = V / jωL
where j is the imaginary unit (√(-1)), ω is the angular frequency (2π * frequency), and L is the inductance. In this case, ω = 2π * 60 and L = 15 * 10^(-3):
I = (277 ∠0°) / (j * 2π * 60 * 15 * 10^(-3))
To find the instantaneous current, we can take the real part of the phasor current and then convert it to the time-domain using cosine function:
I(t) = Re(I * e^(jωt))
(d) For a capacitor with 100 mF, the phasor current can be determined using the formula:
I = jωCV
where C is the capacitance. In this case, ω = 2π * 60 and C = 100 * 10^(-3):
I = (j * 2π * 60 * 100 * 10^(-3)) * 277 ∠0°
To find the instantaneous current, we can take the imaginary part of the phasor current and then convert it to the time-domain using sine function:
I(t) = Im(I * e^(jωt))
1. A net force of 13 Newtons acting north on an object for 4.0 seconds will produce an impulse of?
Answer:
48 kg m/s north
Explanation:
This is not the exact answer but if there's something really close choose that answer
Edgar kicks the ball to Jerry across the soccer field. The ball stays on the ground. The ball has a mass of 21.79 kg. If the coefficient of friction between the grass and the ball is 1.45, what is the force of friction?
The force of friction between the ball and the grass is 309.98 N.
What is Friction?
It occurs as a result of the microscopic irregularities on the surfaces that interlock and resist relative motion. The amount of friction between two surfaces depends on factors such as the nature of the surfaces in contact, the force pressing the surfaces together, and the relative speed between the surfaces. Friction can be beneficial in some situations, such as in walking or driving a car, but it can also be a hindrance in others, such as in machines where it causes wear and tear on moving parts.
To calculate the force of friction, we can use the formula:
Friction force = coefficient of friction × normal force
The normal force is the force that the ground exerts on the ball and is equal to the weight of the ball, which is:
Weight = 21.79 kg × 9.81 m/s^2
Weight = 213.68 N
So, the normal force is 213.68 N.
Now we can calculate the friction force:
Friction force = 1.45 × 213.68 N
Friction force = 309.98 N
Therefore, the force of friction between the ball and the grass is 309.98 N.
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Im really stressed out can you guys help with some work i have. Also i know it says physics as the subject but they had no option for science in general
Can someone write definition and examples for all these words Im in 8th grade and this last semester has been hell
Words:
microorganism
pathogen
toxin
parasite
virus
bacteria
fungi
inflammatory response
phagocyte
lymphocyte
antigen
antibody
immunity: passive and active
vaccination
vaccine
antibiotics
allergy
histamine
carcinogen
tumor
Microorganism: A microscopic organism, such as a bacterium or virus ; Pathogen: An organism or substance capable of causing disease; Toxin: A poisonous substance produced by living cells or organisms.
What is parasite?Parasite: Organism that lives on/ within another organism (host), causing harm to host.
Virus: Submicroscopic infectious agent that replicates inside living cells.
Bacteria: Single-celled microorganism that can cause disease or aid in various biological processes.
Fungi: A group of organisms that includes yeasts, molds, and mushrooms, often associated with the decomposition of organic matter.
Inflammatory response: Physiological response to injury or infection characterized by redness, heat, swelling, and pain.
Phagocyte: Type of white blood cell that engulfs and destroys foreign substances in the body.
Lymphocyte: A type of white blood cell responsible for the body's immune response.
Antigen: Substance that triggers an immune response by the body.
Antibody: Protein produced by the body in response to the presence of an antigen, which helps to neutralize or destroy the antigen.
Immunity: Ability of the body to resist disease through the production of antibodies.
Vaccination: Administration of a vaccine to stimulate the immune system to produce immune response to specific pathogen.
Vaccine: Substance that contains weakened or inactive pathogens, or parts of pathogens, that stimulate the immune system to produce immune response to specific pathogen.
Antibiotics: Medications that inhibit or kill bacteria.
Allergy: Immune response to a harmless substance that is perceived as a threat by the body.
Histamine: Chemical released by the body in response to injury or infection that causes inflammation and other immune responses.
Carcinogen: Substance capable of causing cancer.
Tumor: Abnormal growth of cells that may be benign (non-cancerous) or malignant (cancerous).
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in some correlations (for instance, the churchill-bernstein correlation), all properties are evaluated at the film temperature . how is film temperature defined? group of answer choices
Film temperature is a measure of the average temperature of a film of fluid, such as air, liquid, or gas, which is in direct contact with a solid surface.
It is the average of the temperature at the interface between the fluid and solid and the average temperature of the fluid. The film temperature is important to understand the behavior of a fluid on a solid surface, as it is related to the magnitude of the forces acting between them.
For example, in the Churchill-Bernstein correlation, the film temperature is used to calculate the coefficient of friction between two surfaces, which is important for understanding the behavior of a fluid in a system. Film temperature also helps identify the viscosity of a fluid, which is important for understanding the flow of a fluid in a system.
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near one end of an electrically neutral aluminium rod lying on a table made of non conducting material ,you hold a comb that is also made of non conducting material .does a small still sphere located near the other end of the sphere
The sphere located at the opposite end of the aluminum rod does not acquire an electric charge.
The presence of a comb, held near one end of the rod, causes electrons from the rod to flow towards the comb due to its negatively charged electrons. This leads to a rearrangement of electrons within the rod, but not to the generation of an electric charge at the other end, which is too distant to be impacted by the comb.
Since both the comb and the rod are made of non-conductive materials, the flow of electrons is restricted and the rearrangement of electrons is limited, thus the sphere remains uncharged.
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How is this distance related to force in this experiment? To mass?
Answer:
I'm not quite sure what your looking for...
Even though a bowling ball may experience 100 times the force of a tennis ball, it has 100 times the mass. So, the force/mass ratio (from the equation acceleration = force/mass) is the same for each. Therefore, the acceleration is the same and they reach the ground at the same time. Aim of the experiment To investigate the relationship between the force, mass and acceleration by varying the masses added to trolleys.
Explanation:
Pete is driving down 7th Street. He
drives 215 Meters in 20 seconds. Assuming
he does not speed up or slow down, what
is the speed?
Answer:
v=10.75m/s
Explanation:
It is given that,
Pete drives 215 Meters in 20 seconds. He is driving down 7th floor. We need to find his speed.
Speed = distance/time
⇒
\(v=\dfrac{215\ m}{20\ s}\\\\v=10.75\ m/s\)
Hence, the speed of Pete is 10.75 m/s.
The _______scale is called an absolute temperature scale, and its zero point is called
absolute zero.
O A. Celsius
O B. Fahrenheit
O C. Kelvin
Answer:
It is C the kelvin scale
Explanation:
Have a great day
Which of these objects are malleable? Check all that apply.
- tin fork and knife from camping set
- antique ceramic vase
- steel poke fence post
- marble sculpture
- glass tabletop
- copper coin
Answer:
Tin fork and knife.....Copper coin...steel pole
Explanation:
Malleable objects are those which could be shaped with out breaking or could be turned into wires. Tin fork and knife could be bent so it is malleable, copper could be turned into wires so it is also malleable. Most of the metals are malleable. Mild Steel is used in making poles and pipes which is malleable
Answer:
A C F or tin fork and knife from camping set
steel pole fence post
copper coin
Explanation:
I got it right on edg
hope it helps :)
A 10 kg box is pulled across a level floor, where the coefficient of kinetic friction is
0.35. What horizontal force is required for an acceleration of 2.0 m/s2?
A 10 kg box is pulled across a level floor, where the coefficient of kinetic friction is 0.35. The horizontal force is required for an acceleration of 2.0 m/s2 will be 54.3 N
Newton’s second law states that the acceleration of an object depends upon two variables – the net force acting on the object and the mass of the object. The acceleration of the body is directly proportional to the net force acting on the body and inversely proportional to the mass of the body.
equation of motion will be
F(net) = mass * acceleration
F - fr = m * a
where
F = force by which the box is moving
fr = force due to friction
m = mass of the object
a = acceleration by the object is moving
F = fr + m * a
= (mu * N) + ma where N = mg
= (mu * mg) + ma
= (0.35 * 10 * 9.8) + 10 * 2
= 54.3 N
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What is the disadvantage of the circuit pictured below
A._ The addition of more light bulbs decreases the flow of electricity through the circuit.
B._ The addition of more light bulbs decreases the voltage to each bulb.
C._ The addition of more light bulbs decreases the resistance in the circuit.
D._ The circuit only works when alternating current is used.
The circuit shown has the drawback that it can only operate with alternating current.
The correct answer is D
What exactly do you mean by "alternating current"?A type of electrical current known as alternating current (AC) alternates the flow of electrons periodically or in cycles between two directions. Alternating current (AC) is the kind of current that circulates through electrical outlets used in everyday homes and power lines.
How do AC & DC current differ from one another?Both alternating current (AC) and direct current (DC) are types of electric current (DC). The way that electrons move determines how AC and DC are different from one another. While the flow of electrons in AC is constantly changing, moving first ahead and then backward, as opposed to DC's steady movement in one direction
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skater A travels with velocity of 3.2 m/s and has a momentum of 200 kg m/s
Here's link\(^{}\) to the answer:
bit.\(^{}\)ly/3gVQKw3
__________ is a severe condition that occurs from extreme exposure to the sun.
A. Heat stroke
B. Bulimia
C. Hypothermia
D. Sun burn
Answer:
Heat stroke
Explanation:
The vertical columns on the periodic table of elements are called groups.
O A. True
B. False
Answer:
A. True
Explanation:
The vertical columns on the periodic table are called groups or families because of their similar chemical behavior.
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how often does djokovic hit his first serve faster than 120 mph?
Novak Djokovic hits his first serve faster than 120 mph for approximately 15% of the time during his matches.
Novak Djokovic is a Serbian professional tennis player who has been ranked world No. 1 in men's singles tennis by the Association of Tennis Professionals (ATP) a record total of 324 weeks.
Between Nadal and Djokovic, Djokovic has a faster first serve averaging about 113 mph while Nadal's average is around 106 mph.
In tennis, a first serve is the initial shot in a point that a player executes from behind the baseline to start a point. The server aims to hit the ball into the opponent's service box on the other side of the court.
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Why will air sink if it is colder than the air around it?
Answer:
The molecules in hot air are moving faster than the molecules in cold air.
calculate the maximum force, in newtons, exerted by the blood on an aneurysm (a ballooning in a major artery), given that the effective area of the aneurysm is 18.5 cm2.
36.99N
Given
Maximum blood pressure P = 150 mm
Effective area of the aneurysm a = 18.5 cm2.
Expression for the maximum force exerted by blood on an aneurysm is,
f =P * a = (150 mm Hg* (133.322 N/m²/ 1 mmHg)) * ( 18.5 cm² * (1 m² /10000cm²)) = 36.99N
The pressure is computed as the ratio of acting force on an object and the surface area of the object where the force is directed. The pressure is usually measured in terms of Pascal and blood pressure in mm of Hg.
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two trains with 154 hz horns approach one another. the slower of the two trains has a speed of 25 m/s . part a what is the speed of the fast train if an observer standing near the tracks between the trains hears a beat frequency of 5.0 hz ? express your answer using two significant figures
The speed of the faster train is approximately 30 m/s.
When two trains with horns of different frequencies approach each other, an observer standing between them will hear a beat frequency equal to the difference in the frequencies of the horns. In this case, since both trains have horns of 154 Hz, the beat frequency heard by the observer is solely due to the Doppler effect. The Doppler shift in frequency is given by Δf/f = v/c, where v is the speed of the train, c is the speed of sound, and Δf is the beat frequency. Solving for v, we get v = (cΔf)/f. Plugging in the given values, we find that the speed of the faster train is approximately 30 m/s.
When two trains with horns of different frequencies approach each other, an observer standing between them will hear a beat frequency equal to the difference in the frequencies of the horns. In this case, both trains have horns of 154 Hz, so the beat frequency heard by the observer is solely due to the Doppler effect. The Doppler shift in frequency is given by Δf/f = v/c, where v is the speed of the train, c is the speed of sound, and Δf is the beat frequency. Solving for v, we get v = (cΔf)/f.
To find the speed of the faster train, we need to first calculate the speed of sound. At a temperature of 20°C, the speed of sound in air is approximately 343 m/s. Plugging in the given values, we get v = (343 m/s * 5.0 Hz) / 154 Hz = 11.14 m/s.
Next, we can use the fact that the slower train has a speed of 25 m/s to set up an equation relating the speeds of the two trains. Letting v1 be the speed of the slower train and v2 be the speed of the faster train, we have v1 + v2 = 2v, where v is the speed of sound. Solving for v2, we get v2 = 2v - v1 = 2(343 m/s) - 25 m/s = 661 m/s. Rounding to two significant figures, the speed of the faster train is approximately 30 m/s.
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Which of the following substitute products would be of most concern for a cable tv distributor? satellite radio terrestrial radio streaming music services broadcast tv on-demand internet television
The substitute product of most concern for a cable TV distributor would be on-demand internet television, as it directly competes with cable TV by offering similar content and services but through online streaming platforms.
On-demand internet television, also known as over-the-top (OTT) television, refers to the delivery of television content over the internet rather than through traditional cable or satellite TV providers.
Services such as Netflix, Amazon Prime Video, Hulu, and Disney+ offer streaming access to a wide range of TV shows, movies, and original programming, and are increasingly popular among viewers who are looking for flexibility in their viewing habits.
Cable TV distributors have traditionally relied on exclusive access to popular content and bundling packages of channels to attract and retain customers.
However, the rise of on-demand internet television has disrupted this model by offering a more personalized and convenient viewing experience, often at a lower cost.
This has led to declining subscriber numbers for cable TV distributors, particularly among younger viewers who are more likely to consume content through streaming platforms.
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a 70 n force pulls a box straight up 5 m above the ground. if the box is not moving after it is lifted, what type of energy does it now have? a. chemical b. elastic c. gravitational d. kinetic
The box has gravitational energy. Therefore, option c is correct.
Gravitational potential energy is the energy an object has due to its position in a gravitational field. When the box is lifted to a height of 5m above the ground, it gains an amount of gravitational potential energy equal to the work done on it, which is equal to the force (70N) multiplied by the distance (5m).
When a 70 N force pulls a box straight up 5 m above the ground, and the box is not moving after it is lifted, the type of energy it now has is gravitational energy. Gravitational potential energy is the potential energy stored in an object because of its height over the Earth's surface. An object that has been lifted above the ground has the ability to do work when it falls back to the ground. The work is generated by the object's gravitational potential energy, which is a function of its mass and height over the ground.
As a result, the option c, gravitational, is the correct answer.
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A lightbulb uses 2,000 J of energy in 1 min and 20 s. What is the power of the lightbulb?
Answer:
ga tau gw ah binatang aje
A constant force of 10 N causes a box to move at a constant speed of 3 m/s. How much work is done in 10 seconds?
o
30j
100j
300j
According to the question the amount of work done in 10 seconds is 300 J.
What is work?Work is an activity undertaken by an individual or group that involves physical or mental effort in order to achieve a result or goal. It is often used to refer to paid employment, but it can also be used to refer to voluntary activities or activities undertaken for personal development. Work can be a source of satisfaction and self-fulfillment, providing individuals with a sense of purpose and identity. It can also be a source of stress and frustration, depending on the individual's ability to manage the demands of their job. Work can involve both physical and mental activities, and can be done either independently or collaboratively in teams. Work can also be divided into different categories, such as manual labor, professional work, and creative work.
The amount of work done is equal to the force applied multiplied by the distance the object moves. Since the force is constant and the speed is constant, the distance the box moves in 10 seconds is 10 x 3 = 30 m. Therefore, the amount of work done in 10 seconds is 10 N x 30 m = 300 J.
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When people make a government, what two things should they have?
What characteristics of the solar system would have to be known or calculated in order to send a
probe to a distant planet, such as Jupiter?
a. the effects due to the light from the distant stars
b. the effects due to the air in the solar system
c. the effects due to the gravity from the other planets
d. the effects due to the cosmic microwave background radiation
Answer:
A
Explanation:
The effects due to light from distant stars
The characteristics of the solar system would have to be known or calculated in order to send a probe to a distant planet, such as Jupiter, due to the effects of the gravity from the other planets. Hence, option C is the correct answer.
When sending a probe to a distant planet, such as Jupiter, one of the critical factors that would have to be known or calculated is the effects due to the gravity from the other planets in the solar system. The gravitational interactions between the planets can significantly influence the trajectory and path of the probe during its journey. Accurate calculations are necessary to ensure that the probe's trajectory is properly planned and adjusted to reach its destination with precision. Hence, option C is the correct answer.
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What level of certainty do you have that the sun will rise tomorrow
my certainty is 99.999999% because the earth has been around for about 4 quadrillion years or more and the sun has risen on almost every single one of them, so the odds of the sun not coming up are very very low.
Answer:
100%
Explanation:
A series rlc circuit has a 220 khz resonance frequency. what is the resonance frequency if the capacitor value is doubled?
A series RLC circuit has a 220 kHz resonance frequency. If the resonance frequency of the capacitor value is doubled, the new resonant frequency is 155.58 kHz
The resonant frequency refers to the value of the frequency of the circuit when the impedance of the RLC becomes minimum. At the resonant frequency, the current flowing through the circuit reaches its peak value as R, L and C in the circuit behave as short-circuited components.
The resonant frequency of the series RLC circuit is given by
\(f = \frac{1}{2\pi } \sqrt{\frac{1}{LC} }\)
Now, the capacitance is doubled then the equation becomes
\(f = \frac{1}{2\pi } \sqrt{\frac{1}{L(2C)} }\)
Which can be rearranged and written as
\(f_{new} = \frac{1}{\sqrt{2} } (\frac{1}{2\pi } \sqrt{\frac{1}{LC} } )\)
\(f_{new} = \frac{f}{\sqrt{2} }\)
Therefore the new frequency is 220kHz/1.414 = 155.58kHz
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can you tell Which body part does not help in the perception and production of sound in humans?
ears, lungs, mouth or vocal cords
which is not?
Lungs do not help in the perception and production of sound in humans.
What are lungs?Gaseous exchange occurs during inhalation and exhale during breathing. Main components of the human respiratory system include the nose, mouth, throat, larynx, trachea, bronchi, and lungs.
In humans and other vertebrates, the primary organs for respiration are the lungs. They are situated in the thoracic cavity of the chest, on either side of the heart. The lungs are spongy, anatomically speaking, with a total surface area that ranges from 50 to 75 square meters.
The lungs' main job is to make it easier for gases to move from the blood into the air. It's interesting to note that the right lung is significantly larger and heavier than the left.
Hence, lungs do not help in the perception and production of sound in humans.
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