The given statement about “A positive feedback loop is a physiological process designed to push the body beyond a physiological level to a determined endpoint” is true because during positive feedback, a physiological system encourages the change.
A positive feedback loop in a human-related system is described as a system responding in such a way that an idea or action has a positive influence on the idea or action that sparked the loop in the first place. In natural systems, the presence of a positive feedback loop can magnify or exaggerate the consequences of a very modest disruption or change, which then become mutually reinforcing and cause the system to react. This is in contrast to a system having a negative feedback loop, in which the change or disturbance is mitigated or self-corrected as the system returns to its original equilibrium rather than responding exponentially.
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Jogging Jake runs at 4 m/s along a train flatcar that moves at 10 m/s in the opposite direction. Jake's speed relative to the ground is______
Choose matching term
O 5 m/s
O 11 m/s
O 4 m/s
O 6 m/s
Jake's speed relative to the ground is 14 m/s. Here option C is the correct answer.
Relative velocity is calculated using the formula: relative velocity = velocity of object 1 - velocity of object 2
In this case, Jake's velocity relative to the ground is 4 m/s (his jogging speed) - (-10 m/s) (the velocity of the flatcar).
Relative velocity = 4 m/s + 10 m/s = 14 m/s.
In physics, relative velocity refers to the velocity of an object relative to a reference frame or another object. When two objects are moving in the same or opposite directions, the relative velocity between them can be calculated using the formula: relative velocity = velocity of object 1 - velocity of object 2.
In the case of Jake and the train flatcar, the relative velocity between Jake and the ground can be calculated as the sum of his jogging velocity and the velocity of the flatcar in the opposite direction. In this scenario, Jake is jogging at 4 m/s and the flatcar is moving in the opposite direction at 10 m/s, so the relative velocity of Jake relative to the ground is 4 m/s + 10 m/s = 14 m/s.
Complete question:
Jogging Jake runs at 4 m/s along a train flatcar that moves at 10 m/s in the opposite direction. Jake's speed relative to the ground is______Choose matching term
A - 5 m/s
B - 11 m/s
C - 14 m/s
D - 16 m/s
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What is the Q-value (in Mev) for each of the following possible nuclear reactions? Which are exothermic and which are endothermic?11P + 49Be ======> 510B + γ (note the last sign is a gamma)11P + 49Be ======> 59B + 01n11P + 49Be ======> 49Be + 11P11P + 49Be ======> 48Be + 12H11P + 49Be ======> 47Be + 13H11P + 49Be ======> 36Li + 24He
The Q-value (in Mev) for the reaction
11P + 49Be ======> 510B + γ is 11.7MeV and this reaction is endothermic.
The Q-value (in Mev) for the reaction
11P + 49Be ======> 59B + 01n is -10.7 MeV and this reaction is exothermic.
The Q-value (in Mev) for the reaction
11P + 49Be ======> 49Be + 11P is 17.4 MeV and this reaction is exothermic.
The Q-value (in Mev) for the reaction
11P + 49Be ======> 48Be + 12H is -4.2
MeV and this reaction is endothermic.
The Q-value (in Mev) for the reaction
11P + 49Be ======> 47Be + 13H is -3.3
MeV and this reaction is endothermic.
The Q-value (in Mev) for the reaction 11P + 49Be ======> 36Li + 24He is -7.5 MeV and this reaction is exothermic.
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Need this by midnight!!!
E= [tex]\frac{kQ}{r^{2} }[/tex]
Calculate the magnitude of the electric field (in N/C), due to a small charged sphere (Q = + 129 nC), at a point in space that is a distance 5.2 m away.
Round to nearest whole number.
The electric field strength of this field on the charge molecule is 31358.5N/C.
What is Electric field strength?Electric field strength can be defined as a quantitative expression of the intensity of an electric field at a particular location. The electric field strength can be calculated:
E = ∣q∣/4πε₀r²
q = +129 nC
r = 5.2m
E = 129 × 10⁻⁹ × 8.99 × 10⁹ × (5.2)²
E = 1159.71 × 27.04
E = 31358.5N/C
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An iron bar 0.50 m long and a copper bar 1.2m long are joined end to end. One end of the
iron bar is kept at 80°C while the far end of the copper bar is maintained at 00C by a
mixture of ice and water. The outer surface of the bar is logged so that there are no
thermal losses. Both bars are of circular cross section diameter 0.16m. At thermal
equilibrium the temperature at the junction of the metal Tj. Calculate Tj and rate of
energy flow. Thermal conductivity of Iron is 75 Wm-1K
-1 and Thermal conductivity of
copper is 390 Wm-1K
-1
.
Iron bar length (L1) =0.50 m at 80°C, Copper bar length (L2) =1.2m at 0°C and Diameter =0.16 m, Thermal conductivity of Iron(K₁) =75 Wm⁻¹K⁻¹, Thermal conductivity of copper(K₂) =390 Wm⁻¹K⁻¹
What is Rate of energy flow=?According to Fourier's law we know that heat transfer is given as: Q = KAΔT /l
According to question area is same. Q₁ = Q₂
K₁A (T₁ - T)/ L₁ = K₂A (T - T₂) /L₂
75 *A * (80 - T) / 0.5 = 390 * A * (T-0) / 1.2, 150 *(80-T) = 325 (T).
12000 - 150T = 325T
T= 25.26°C, Now, Rate of flow of heat is given as
Q/t = KAΔT /L, Q/t = 300 * πr² * (80-0) / 1.7 (r= 0.16/2)
Q/t = 283.7 J/s
Therefore, Iron bar length (L1) =0.50 m at 80°C, Copper bar length (L2) =1.2m at 0°C and Diameter =0.16 m, Thermal conductivity of Iron(K₁) =75 Wm⁻¹K⁻¹, Thermal conductivity of copper(K₂) =390 Wm⁻¹K⁻¹.
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An electric heater rated at 50 watts is used to
heat 100g of water in a calorimeter from 50°C to 100°C.
Calculate the time for which the current flowed. Neglect the
specific heat capacity of the calorimeter. Take the specific
heat capacity of water as 4200J/kgK.
Answer:
420
Explanation:
Heat required(Q)= m*c*
So Q=21000J
Power=50Wt
time= Q/Power
time=21000/50 sec
time=420seconds
bob is driving the getaway car after the big bank robbery. he's going 50 m/s when his headlights suddenly reveal a nail strip that the cops have placed across the road 140 m in front of him. if bob can stop in time, he can throw the car into reverse and escape. but if he crosses the nail strip, all his tires will go flat and he will be caught. bob's reaction time before he can hit the brakes is 0.8 s , and his car's maximum deceleration is 10 m/s2 . Is Bob in jail?
Bob drives the getaway car after the massive bank robbery. When his headlights reveal a nail strip 140 m ahead, he's going 50 m/s. Bob escaped jail.
Bob's initial speed was 50 m/s and his reaction time was 0.8 s, so his braking distance can be calculated using the equation:
d = v * t + (a * t^2)/2,Where:
a is the deceleration.t is the reaction time plus the time it takes to come to a stop.Substituting the values, we get:
d = 50 * 0.8 + (10 * (0.8^2))/2 d = 40 + 3.2 d = 43.2 mSo if Bob's stopping distance is less than 140 m, he can stop in time and escape. Since 43.2 m is less than 140 m, Bob is not in jail and has escaped.
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A car rounds a flat curve of radius R with a speed of . The coefficient of friction between the tires and the road is . For the car not to slide on the road, which of the following statements must be true? (A) The car's speed u cannot be greater than ㎍R (B) The car's speed cannot be less than μgR. (C) The radius R of the car's path cannot be greater than vo lug (D) The radius R of the car's path cannot be less (E) The centripetal acceleration must be less than g.
The vehicle's speed is [tex]\mu g r[/tex]
When the car is in drive, all the forces are in
[tex]F_N cos\theta =mg + \mu_s\ F_N sin\theta[/tex]
It is a situation in which opposing forces or actions are in equilibrium and can be either static
like when forces act on a body and the resultant is zero or dynamic as in a reversible chemical reaction when the rates of reaction in both directions are equal
The state of equilibrium is one in which the forward and backward rates of response are equal.
equilibrium and harmony the vertical axis equation should be
[tex]F_N cos\theta +\mu_s F_N cos\theta =\frac{mv^2}{R}[/tex]
and along the horizontal axis,
[tex]F_N[/tex] = normal force= mg
solving equations 1 and 2 as a pair
[tex]v^2= \frac{(\mu_s \ cos\theta + sin\theta)Rg}{cos\theta - \mu_s sin \theta}[/tex]
in order to bank [tex]\theta = 0[/tex]
= [tex]\mu_s Rg[/tex]
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One of the advantages of natural gas as a source of fuel is that it is clean easy to locate safe unlimited
An advantage of natural gas as a source of fuel is that it is easy to extract
Is natural gas beneficial or detrimental?Natural gas is more ecologically friendly than other fossil fuels since it burns cleaner. When compared to other fossil fuels, it is safer and easier to store. Natural gas is highly dependable, unlike electric power, which can be disrupted during a storm. Natural gas is cheaper than other fossil fuels. In the case of traditional natural gas, once a source is discovered, the gas may be simply extracted by drilling.
Despite being simpler to store and transport than other fossil fuels and renewables, natural gas has one significant storage drawback. Its volume is four times more than that of gasoline. As a result, natural gas storage is substantially more expensive since more storage area is required.
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A piece of purple plastic is charged with 1.55×106
extra electrons compared to its neutral state. What is its net electric charge (including its sign) in coulombs?
A glittering glass globe is given a net electric charge of 9.53×10−6
C. Does the globe now have more or fewer electrons than it does in its neutral state?
fewer/more
How many more or fewer?
amount:
electrons
There is a charge of 1.602 10-19 coulombs per electron. If 8.51 10-6 more electrons are present. 1 electron has a coulombnage of 1.602 10-19.
What is Electrons?8.51 106 electrons/x = -1.602 10-19 * 8.51 106/1 = 1.32 10-12 coulombs. Consequently, the additional electrons provide a charge of 1.32 10-12 coulombs.
Therefore, the net charge is -1.32 10 12 coulombs (there are additional electrons, but there are also protons, therefore they have no bearing on the net charge; the additional electrons just offset the charge of the protons).
A negatively charged subatomic particle known as an electron can either be free or attached to an atom (not bound). One of the three main types of particles within an atom is an electron that is bonded to it; the other two are protons and neutrons.
Therefore, There is a charge of 1.602 10-19 coulombs per electron. If 8.51 10-6 more electrons are present. 1 electron has a coulombnage of 1.602 10-19.
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what is the relationship between the electric field due to the two charges and the distance from the center along the charge axis
The electric field due to two charges is inversely proportional to the square of the distance from the center along the charge axis.
That is, the electric field increases as the distance decreases and vice versa. This is because the electric field is generated by the two charges, and the further away from the center you are, the weaker the electric field will be.
The inverse square law states that the magnitude of the electric field due to two point charges is inversely proportional to the square of the distance from the center of the two charges along the line connecting them. This means that, as the distance between two charges increases, the electric field decreases, and vice versa.
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Choose the correct procedure for determining the components of a vector in a given coordinate system from this list: A. Align the adjacent side of a right triangle with the vector and the hypotenuse along a coordinate direction with as the included angle. B. Align the hypotenuse of a right triangle with the vector and an adjacent side along a coordinate direction with as the included angle. C. Align the opposite side of a right triangle with the vector and the hypotenuse along a coordinate direction with as the included angle. D. Align the hypotenuse of a right triangle with the vector and the opposite side along a coordinate direction with as the included angle
The correct answer is option b Align the hypotenuse of a right triangle with the vector and an adjacent side along a coordinate direction with theta as the included angle.
What is components of vector in coordinate system?
A coordinate system is a method for determining how to position points or other geometrical objects on a manifold, such as Euclidean space, uniquely using one or more numbers, or coordinates. The coordinates' order is important, and often they are recognized by their place in an ordered tuple or by a letter, as in "the x-coordinate." In elementary mathematics, the coordinates are assumed to be real numbers, although they could instead be complex numbers or components of a more abstract system, such as a commutative ring.
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A ball is thrown straight up into the air.At each of the fallowing instants,is the magnitude of the ball's acceleration greater than g,less than g,equal at g,or zero? a.Just after leaving your hand?
b.At the very top (maximum height).
c.Just befor hitting the ground.
The pace at which a body's velocity changes is known as acceleration.The ball begins moving vertically with an initial velocity when it is hurled vertically upward.
What is the acceleration ?The pace at which a body's velocity changes is known as acceleration.The ball accelerates more quickly after releasing from the hand than it does due to gravity (g). At its highest point (maximum height), the ball accelerates at a rate equal to the acceleration caused by gravity, or g.The ball accelerates at the same rate as gravity, or g, immediately before it touches the earth. A) The ball accelerates immediately after releasing from the hand. When the ball was in the hand, it was at rest.The ball is now sent directly into the air, requiring some acceleration.In order for the ball to move with the upward force in an upward direction, this acceleration must be larger than the acceleration caused by gravity.As a result, the ball's acceleration immediately after it leaves the hand is greater than the acceleration caused by gravity, or g.B) The ball's acceleration at its highest point (maximum height): When the ball is at its highest point, its speed is zero.The ball has no velocity, but because there is only one force acting on it at its greatest point, its acceleration is equal to the force of gravity.As a result, the ball's acceleration at its highest point (maximum height) is equal to the acceleration caused by gravity, or g.C) The ball's acceleration immediately before impact with the ground. The ball was falling straight down just before impact, like a body in free fall.To learn more about acceleration refer
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when is it true that the average velocity of an object is equal to the arithmetic mean of the initial and final velocities, i.e. vavg
If the velocity of an item changes at a constant rate (constant acceleration), the average velocity is determined by the arithmetic mean of the starting and final velocity during a certain time period.
An object's average velocity (v) is equal to the sum of its final velocity (v) and beginning velocity (u), divided by two. Where v is the average velocity. v denotes the final velocity.
A body's average velocity is equal to the mean of its starting and final velocity.
When the acceleration is zero or the velocity is constant, all instantaneous velocities are identical to each other as well as the average velocity.
If an object's beginning and end velocity are the same, its acceleration is zero.
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A gardener needs to load a lawnmower into a truck. The lawnmower has a mass of 146 kilograms. How much gravitational force must the gardener overcome to lift the lawnmower?
1423.8 N gravitational force must the gardener overcome to lift the lawnmower
Calculating the force:The gravitational force can be calculated by:
F = m × g
where F is the gravitational force, m is the mass of the lawnmower, and g is the acceleration due to gravity.
F = 146 kg × 9.8 m/s²
= 1423.8 N
So, the gardener must overcome a gravitational force of 1423.8 N to lift the lawnmower into the truck.
What does "gravitational force" imply?the attraction between any two masses in the universe caused by gravitational attraction. Newton's law of universal gravitation, which states that every particle in the universe attracts all other particles with a force proportional to the sum of their masses, was the first to describe it.
How can the gravitational force be calculated?The gravitational force can be determined by: F is the force of gravity, G is the gravitational constant (6.67 x 10-11 Nm2/kg2), m1 and m2 are the masses of the two things, and r is the distance between them.
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A ball of mass 2kg is launched upward with a velocity of 5m/s. Calculate the height when the ball stops moving. (PLEASE HELP i dont understand this and this is due tmr pls do it step by step!!)
Answer:
Wouldn't it be 0 because that's when the ball stops?
Explanation:
How are electromagnetic waves different than all other waves?
How are electromagnetic waves different than all other waves?
Answer:
They are contagious.
They are reflectible.
Matter can vibrate due to them.
They are capable of space travel.
Explanation:
In contrast to mechanical waves, electromagnetic waves can travel without a medium. This implies that electromagnetic waves can pass not only through solid objects like air and rock but also through empty space.Charges that are oscillating (and radiate everytime they are accelerated) produce electromagnetic waves, which have the same frequency as the oscillation. It is typically a transverse wave because the electric and magnetic fields in the majority of electromagnetic waves are perpendicular to the direction the wave goes.
A50 V battery is connected to a solenoid with inductance 45 H using a wire with a resistance of 9 ohms Calculate the time it takes for the current to build up to 2 Amos this time bigger than less than or equal to the time constant of the circuit? Explain why, based on how the time constant is definest, and without just using the formula for the time constant
The time constant of the circuit is the product of the resistance and the inductance, and it represents the time it takes for the current to reach 63.2% of its maximum value when changing from 0 to its final value.
In this case, the time constant of the circuit is 45 H * 9 ohms = 405 milliseconds.
To calculate the time it takes for the current to build up to 2 A, we cannot just use the formula for the time constant. Instead, we need to use the exponential equation for the current in an RL circuit:
i(t) = i_final * (1 - e^(-t/τ))
where τ is the time constant.
Setting i(t) = 2 A, we can solve for t:
2 = 2 * (1 - e^(-t/405 ms))
e^(-t/405 ms) = 0.5
-t/405 ms = ln(0.5)
t = 405 ms * ln(2)
The time it takes for the current to build up to 2 A is less than the time constant of the circuit. This means that the circuit will reach 63.2% of its maximum current within 405 ms, but it will take longer to reach 2 A.
Compare the acceleration of a motorcycle that accelerates from 90 km/h to 100 km/h with the acceleration of a bicycle that accelerates from rest to 10 km/h in a half of that time.
The comparation of the acceleration of a motorcycle with the acceleration of a bicycle is 1 : 2. The result is obtained by using the formula for acceleration.
What is acceleration?Acceleration is the rate of change in velocity of an object with respect to time. It can be expressed as
a = Δv/Δt
Where
a = accelerationΔv = change in velocityΔt = change in timeCompare the acceleration of
A motorcycle with v₀ = 90 km/h, v₁ = 100 km/h, and Δt₀ = change in timeA bicycle with v₂ = 0, v₃ = 10 km/h, and Δt₁ = ½Δt₀The acceleration of a motorcycle is
a₁ = (v₁ - v₀)/Δt₀
a₁ = (100 - 90)/Δt₀
a₁ = 10/Δt₀
The acceleration of a bicycle is
a₂ = (v₃ - v₂)/Δt₁
a₂ = (10 - 0)/½Δt₀
a₂ = 10/½Δt₀
a₂ = 20/Δt₀
The comparation (ratio) of a₁ and a₂
a₁ ÷ a₂ = 10/Δt₀ ÷ 20/Δt₀
a₁ ÷ a₂ = 1 ÷ 2
Hence, the ratio of the acceleration of a motorcycle and a bicycle is 1 : 2.
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a flexible container at an initial volume of 8.15 l 8.15 l contains 8.51 mol 8.51 mol of gas. more gas is then added to the container until it reaches a final volume of 13.7 l. 13.7 l . assuming the pressure and temperature of the gas remain constant, calculate the number of moles of gas added to the container.
The number of moles of gas added to the container is -3.56 mol, and the negative sign means that the number of moles of gas decreased, or in other words, the gas was compressed.
The number of moles of gas can be calculated using the Ideal Gas Law:
PV = nRT
where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature.
Since the pressure and temperature remain constant, we can equate the initial and final state of the gas:
n1 × (8.15 L) × (T) = n2 × (13.7 L) × (T)
Dividing both sides by T, we get:
n1 × 8.15 L = n2 × 13.7 L
Solving for n2:
n2 = (n1 × 8.15 L) / (13.7 L)
n2 = (8.51 mol) × (8.15 L) / (13.7 L)
n2 = 4.95 mol
So, the number of moles of gas added to the container is:
n2 - n1 = 4.95 mol - 8.51 mol = -3.56 mol.
Note that the answer is negative, which means that the number of moles of gas decreased, or in other words, the gas was compressed.
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Estimate and determine the order of magnitude of the circumference of the Earth in miles and the speed of a sailboat in miles per hour. O The Earth's circumference is 10^3 mile and the the speed of a sailboat is 10^0 mile/hour.
O The Earth's circumference is 10^4 mile and the the speed of a sailboat is 10^1 mile/hour.
O The Earth's circumference is 10^5 mile and the the speed of a sailboat is 10^1 mile/hour.
O The Earth's circumference is 10^4 mile and the the speed of a sailboat is 10^0 mile/hour.
Estimate how many hours it would take to sail around the world in a sailboat using the values in Part F by determining the order of magnitude exponent n (i.e. it would take 10^n hour to sail around the world).
The Earth's circumference is 10^4 miles and the speed of a sailboat is 10^0 mile/hour, which is the closest estimate to the actual values. Here option D is the correct answer.
The Earth's circumference is approximately 40,000 km or 24,901 miles, so the order of magnitude of its circumference in miles is 10^4 miles.
The average speed of a sailboat can range from 3-15 mph, so the order of magnitude of the speed of a sailboat is 10^1 miles per hour.
To sail around the world, it would take approximately 10^5 to 10^6 hours, so the order of magnitude exponent for the time it would take to sail around the world is 10^5 to 10^6 hours.
Complete question:
Estimate and determine the order of magnitude of the circumference of the Earth in miles and the speed of a sailboat in miles per hour. A - The Earth's circumference is 10^3 miles and the speed of a sailboat is 10^0 mile/hour. B - The Earth's circumference is 10^4 mile and the speed of a sailboat is 10^1 mile/hour. C - The Earth's circumference is 10^5 miles and the speed of a sailboat is 10^1 mile/hour. D - The Earth's circumference is 10^4 mile and the speed of a sailboat is 10^0 mile/hour. Estimate how many hours it would take to sail around the world in a sailboat using the values in Part F by determining the order of magnitude exponent n (i.e. it would take 10^n hour to sail around the world).
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The components of the displacement A
are A=-1.00 m and A-1.732 m. Find
the magnitude of A
OA 1.90m
O B.2.00 m
OC. 2.30 m
O D. 1.00 m
Answer:1.93
Explanation:
The magnitude of a vector can be found using the Pythagorean theorem, where the components of the vector are the sides of a right triangle.
In this case, the components of displacement vector A are given as A = -1.00 m and A-1.732 m.
The magnitude of A can be calculated as follows:
A = √(-1.00 m)^2 + (1.732 m)^2 = √3.732 m^2 = 1.93 m
So, the magnitude of displacement vector A is 1.93 m.
The values of A, B, C, and D are not related to the displacement vector A, so they cannot be used to find the magnitude of A.
cart x of mass m0 travels along a horizontal surface with a constant speed in the positive horizontal direction. cart x then collides with cart y of mass m0 , which was initially at rest. after the collision, cart y has a positive velocity. immediately after the collision, cart x and cart y could have one of three final velocities that are indicated in the table. in all scenarios, the total momentum of the two-cart system is the same before and after the collision.
The magnitude of the change in the momentum Δp of object Y compare for each scenario is Δp₃ > Δp₁ > Δp₂. Answer D.
The complete question is in the attachment. The law of conservation of momentum says that the momentum before and after the collision is always the same. For two objects X and Y
p = p'
mx v₀x + my v₀y = mx v₁x + my v₁y
p = momentum before the collisionp' momentum after the collisionmx = mass of X = m₀my = mass of Y = m₀v₀x = initial velocity for X = vv₀y = initial velocity for Y = 0v₁x = final velocity for Xv₁x = final velocity for YMomentum for Y : Δp = my v₁y - my v₀y
Scenario 1
v₁x = 0v₁y = vy₁mx v₀x + my v₀y = mx v₁x + my v₁yScenario 2
v₁x = vx₂v₁y = vy₂mx v₀x + my v₀y = mx v₁x + my v₁yScenario 3
v₁x = - vx₂v₁y = vy₃mx v₀x + my v₀y = mx v₁x + my v₁yThe magnitude of the change in the momentum Δp of object Y
Scenario 1 Δp₁ = m₀vScenario 2 Δp₂ = m₀v - m₀ vx₂Scenario 3 Δp₃ = m₀v + m₀ vx₂Δp₃ > Δp₁ > Δp₂Answer D
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If the speed of a truck is reduced from 26.7m/s to 6.7m/s within a distance of 800m. Find to How long were the breaks applied? How much longer would it take before coming to rest?
Answer:
Below
Explanation:
AVERAGE speed of the truck is ( 26.7 + 6.7) /2 = 16.7 m/s
the time required at this avg speed to cover 800 m is
800 m / 16.7 m/s = 47.9 s
acceleration is change in velocity / change in time
( 6.7 - 26.7) / 47.9 = - .4175 m/s^2
Now: vf = vo + at
0 = 6.7 + (-.4175)t shows t = 16 more seconds to stop
In Young's double-slit interference experiment, if the with bright fringe for light.
of wavelength 2, 0, 1, 2,-) coincides with the with dark fringe
of wavelength 2, (m=1,2,3.), then the ratio ¿/2, is (d) 2+1
adenosine normally acts in several areas of the brain to produce blank .multiple choice question.stimulation of the autonomic centers resulting in constriction of blood vesselsbehavioral sedation by inhibiting the release of other neurotransmittersfaster transmission of signals from the cns to the rest of the bodyenzymes for the synthesis of neurotransmitters
The answer is A: stimulation of the autonomic centers resulting in constriction of blood vessels.
What is blood vessel?A blood vessel is a tube-like structure found in the body that carries blood throughout the body. It is composed of three layers of tissue and forms a network of vessels that transport oxygen and nutrients to cells and tissues and remove carbon dioxide and waste products. Blood vessels include veins, arteries, and capillaries and can be found in almost all parts of the body. The vessels transport blood to and from the heart and lungs, as well as to and from all other organs and tissues.
Adenosine acts in several areas of the brain to stimulate the autonomic centers, resulting in the constriction of blood vessels. This reduces blood pressure and leads to a calming effect on the body. It also aids in the regulation of sleep and wakefulness, as well as other bodily functions.
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A force F
S
1 of magnitude 6.00
units acts on an object at the origin in a direction u 5 30.0° above
the positive x axis (Fig. P3.10). A
second force F
S
2 of magnitude
5.00 units acts on the object in
the direction of the positive
y axis. Find graphically the magnitude and direction of the resultant force F
S
1 1 F
S
2.
Answer:
To find the magnitude and direction of the resultant force F₁ + F₂, you can use the following graphical method:
Draw an arrow to represent F₁ with a length of 6.00 units and an angle of 30.0° above the x-axis. Then draw an arrow to represent F₂ with a length of 5.00 units and an angle of 90° along the y-axis. Finally, draw a vector connecting the two arrows to represent the resultant force. The magnitude of the resultant vector can be measured with a ruler, and the direction can be measured with a protractor. The magnitude of the resultant vector is approximately 8.06 units, and the direction is approximately 35.9° above the x-axis.
Answer:
To find the magnitude and direction of the resultant force F1 + F2, we can use the parallelogram method or the tail-to-tail method.
Using the parallelogram method, we would begin by drawing the vectors F1 and F2, with F1 having a magnitude of 6.00 units and a direction of 30.0° above the positive x axis, and F2 having a magnitude of 5.00 units and a direction of the positive y axis. We would then draw a diagonal from the tail of F1 to the head of F2 and another diagonal from the tail of F2 to the head of F1. The point where the diagonals intersect is the head of the resultant vector F1 + F2.
Using the tail-to-tail method, we would begin by placing the tail of F1 at the tail of F2, then drawing a vector from the head of F1 to the head of F2. The resulting vector would be the same as the one obtained with the parallelogram method.
The magnitude of the resultant force F1 + F2 can be found by using the Pythagorean theorem. The horizontal component of the force is 6.00cos(30) = 5.00 units and the vertical component is 6.00sin(30) = 3.00 units. So, the magnitude is sqrt(5^2 + 3^2)= sqrt(25+9) = sqrt(34) = 5.83 units.
The direction of the resultant force F1 + F2 can be found by using trigonometry. The tangent of the angle is 3/5, so the angle is arctan(3/5) = approximately 36.87 degrees counterclockwise from the positive x-axis.
So, the magnitude of the resultant force is 5.83 units and the direction is 36.87 degrees counterclockwise from the positive x-axis.
Consider the following hypothetical aqueous reaction: A(aq)→B(aq). A flask is charged with 0.065 mol of A in a total volume of 100.0 mL. The following data are collected: Part A
Calculate the average rate of disappearance of A between t= 30 min and t= 40 min, in units of M/s.
Express your answer using two significant figures.
Part B
Between t= 10 min and t= 30 min, what is the average rate of appearance of B in units of M/s? Assume that the volume of the solution is constant.
Express your answer using two significant figures.
For the reaction A(aq)→B(aq) the average rate of disappearance Of A = - Δ.
Define aqueous reaction?
This reaction occurs when two aqueous strong electrolyte solutions mix and produce an insoluble solid, also known as a precipitate. The ability of a substance to dissolve in water is determined by whether the substance can match or exceed the strong attractive forces that water molecules generate between themselves.Aqueous reactions are reactions that take place in water. To understand them, it is important to understand how compounds behave in water. Some compounds are electrolytes- they dissociate into separate ions in water. However, not all electrolytes behave the same way.An aqueous reaction is a chemical reaction that take place in water. Many important chemical reactions take place in water and many of these are associated with life. There are three main types of aqueous reactions and these are known as precipitation reactions, acid-base reactions and oxidation-reduction reactions.To learn more about aqueous reaction refers to:
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at one instant, a 17.0-kg sled is moving over a horizontal surface of snow at 4.10 m/s. after 8.45 s have elapsed, the sled stops. use a momentum approach to find the magnitude of the average friction force acting on the sled while it was moving.
The magnitude of the average friction force acting on the sled is 8.37N
According to the question
We may apply the concept of conservation of momentum to determine the size of the average friction force affecting the sled. An object's change in momentum is equal to the net force that is exerted on it.
The initial momentum of the sled = it's mass * its velocity:
p_initial = m * v_initial = 17.0 kg * 4.10 m/s = 70.7 kg m/s
Since the sled has stopped, its final momentum is zero. The sled's change in momentum throughout the 8.45-second period is equal to the net force exerted on it, and this net force is equal to the friction force:
Δp = p_final - p_initial = 0 - 70.7 kg m/s = -70.7 kg m/s
The average friction force acting on the sled is equal to the change in momentum divided by the time interval over which that change took place:
f_avg = Δp / Δt = -70.7 kg m/s / 8.45 s = -8.37 N (magnitude)
The magnitude of the average friction force acting on the sled is 8.37 N.
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A rocket takes off from Earth's surface, accelerating straight up at 47.2 m/s2. Calculate the normal force (in N) acting on an astronaut of mass 89.4 kg, including his space suit. (Assume the rocket's initial motion parallel to the +y-direction. Indicate the direction with the sign of your answer.)
Answer:
The normal force acting on the astronaut is equal to the astronaut's weight minus the force of gravity acting on him. The force of gravity acting on the astronaut is equal to his mass times the acceleration due to gravity on Earth (9.8 m/s^2).
F_norm = F_gravity - ma = (89.4 kg)(9.8 m/s^2) - (89.4 kg)(47.2 m/s^2) = -4095.56 N
In this case the direction of the force is opposite to the direction of the acceleration. So the force is acting in -y direction. So the answer is -4095.56 N.
A source of voltage v maintains a current I in a circuit. The power (p) input to the cicuit by the source is given by 1. P = v I 2. P – v/I 3. P = i/v 4. P= 1/(v/i)
The power (p) input to the circuit by the source is given by 1) P = v I.
Power is defined as the rate at which energy is transferred in a circuit, and it can be calculated using the equation P = v I, where P is the power, v is the voltage, and I is the current.
The voltage represents the energy per unit charge in the circuit, while the current represents the rate of flow of charge. When these two quantities are multiplied, the resulting power represents the rate at which energy is transferred in the circuit.
This equation is based on Ohm's law, which states that the power in a circuit is proportional to the square of the current and the voltage. By multiplying v and I, the equation P = v I accurately represents the power input to the circuit by the source.
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