When it is given that the distance traveled by the first object before it stops is S, then the distance traveled by the second object is 2S.
What do you understand by coefficient of kinetic friction?The ratio of the friction force to the normal force experienced by a body moving on a dry and non-smooth surface is said as the kinetic friction coefficient, μk.
Under the high velocity conditions, kinetic friction coefficient increases with the velocity. And as velocity increases so the distance also increases.
The kinetic friction formula is given as normal × friction coefficient. So, if force is increased then the normal force is not changed, due to which the friction remains constant.
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calculate the likely number of poles if the machine is not operating significantly from the synchronous speed.
The equation is n = 60 x f /p, where p is the number of pairs of poles per phase, f is the supply frequency, and n is the synchronous speed.
What is a synchronized speed visit?The rotating field AC motor's synchronous speed is a crucial variable. The frequency and variety of magnetic poles are what determine it. The term "synchronous motor" refers to a group of motors that operate at the same speed.
Why is synchronous speed called such and what does it mean?A revolving magnetic field that spins in both space and time is created when the stator winding of the an induction motor receives three phases that are electrically spaced 120 degrees apart. Synchronous motor speed refers to the rate at which the magnetic field is revolving.
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near the end of a marathon race, the first two runners are separated by a distance of 45.0 m. the front runner has a velocity of 3.50 m/s, and the second a velocity of 4.20 m/s. (a) what is the velocity of the second runner relative to the first? (enter a number. enter your answer in m/s faster than the front runner.)
The relative velocity of the second runner relative to the first is 0.7 m/s.
We need to know about relative velocity to solve this problem. The relative velocity depends on the object and observer velocity. It can be written as
v = vo ± v'
where v is relative velocity, vo is object velocity and v' is observer velocity.
From the question above, we know that
vo = 4.2 m/s
v' = 3.5 m/s
The velocity will be minus each other because the direction of the observer is different from the object.
v = vo - v'
v = 4.2 - 3.5
v = 0.7 m/s
Hence, the relative velocity is 0.7 m/s.
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on which of the following does the moment of inertia of an object depend? check all that apply. on which of the following does the moment of inertia of an object depend?check all that apply. linear speed linear acceleration angular speed angular acceleration total mass shape and density of the object location of the axis of rotation
The moment of inertia of an object depend on Option D. total mass shape and density of the object location of the axis of rotation.
Angular acceleration refers back to the time fee of change of angular velocity. As there are types of angular velocity, specifically spin angular pace and orbital angular velocity. The motion of rotating items which include the wheel, fan, and earth are studied with the assistance of angular acceleration.
Angular Acceleration is described because of the time charge of alternate angular speed. it also includes expressed in radians according to 2d consistent with 2nd. as a consequence, α = d ω d t. The angular acceleration is likewise known as rotational acceleration.
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it depends upon
a)total mass
b)shape and density of the object
c)location of the axis of rotation
Table 4. Interaction between two permanent bar magnets what i did to the pair of magnets to cause interaction. Observed effect/s (attracted or repeled).
In order to attract or repel another substance, a substance must be a magnet. The atoms are arranged in domains of a magnet, each of which is aligned in a . Both the North and South poles of a magnet are present.
What comprises a magnet?Iron, nickel, or cobalt make up the majority of permanent magnets. An alloy called Alnico is comprised of cobalt, nickel, and aluminum. Alnico alloys are capable of producing powerful permanent magnets. They are widely used in industrial applications and consumer electronics.
What are magnet's four applications?Magnets are used in the operation of microwave ovens, televisions, and computers. Refrigerator doors are held closed by magnets, and road sweeping trucks are also equipped with magnets. In addition, magnets are employed in roller coaster braking systems, railroads, and medical instruments that produce magnetic images.
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PLEASE ASAP HELP WHO EVER IS FIRST I WILL GIVE THANKS LIKE AND POINTS AND STUFF PLEASE ALSO IT HAS TO BE CORRECT
Answer:
its c i had this as home work and got a 100%
Explanation:
Answer:
reupload the photo please
The graph shows a truck's velocity over time.
Velocity (m/s)
What is the truck's acceleration between 5 and 10 seconds?
A. 3 m/s²
B. 2 m/s²
C. 0 m/s²
OD. 6 m/s²
The Trucks acceleration between 5 and 10 seconds is 0 m/s². Option C.
Solution:
v = 30m/s (final velocity)
u = 30m/s (initial velocity)
t = 10-5= 5s
a = v-u/t
a = 30-30/5
a = 0 m/s²
The main causes of poor acceleration are air and fuel issues and sensor issues. However, mechanical problems can also cause poor performance. Easy acceleration stay still don't accelerate. Progressive Acceleration Gradually accelerates to the desired speed. Thrust Acceleration Move quickly and gain speed.
Rate of change of velocity over time for both acceleration velocity, and direction. A point or object moving in a straight line accelerates as it accelerates or decelerates. Circular motion accelerates because the direction is always changing even if the speed is constant. The gas pedal in your car can actually increase your speed.
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ball a has half the mass and eight times the kinetic energy of ball b. what is the speed ratio vava / vbvb ?
Ball b has eight times more kinetic energy than ball a, which has half its mass. The speed ratio is 4.
What exactly does kinetic energy mean?Force must be applied to object in order to accelerate. To apply a force, we must work hard. Because energy has been transferred to the object, it will be moving at a new, constant speed once the operation is finished.
Given,
Two balls a and b
and the mass of ball an is half that of ball b..
Kinetic energy of ball a is eight times kinetic energy of ball b.
mₐ = [tex]\frac{1}{2} m_{b}[/tex]
KEₐ = 8 KE[tex]_{b}[/tex]
Kinetic energy is measured by,
KE = 1/2 mv²
KE ratios for both balls a and b are calculated,
∴ [tex]\frac{KE_{a} }{KE_{b} }[/tex] = [tex]\frac{1/2 m_{a} v_{a}^{2} }{1/2 m_{b} v_{b} ^{2} }[/tex]
[tex]\frac{8 KE_{b}}{KE_{b} }[/tex] = [tex]\frac{1/2 (1/2m_{b}) v_{a}^{2} }{1/2 m_{b} v_{b} ^{2} }[/tex]
16 = [tex]\frac{v_{a} ^{2} }{v_{b} ^{2} }[/tex]
[tex]\frac{v_{a} }{v_{b} }[/tex] = 4/1
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a bicycle has a momentum of 15 kg*m/s. what momentum would the bicycle have if it had 8 times the mass and was moving with 0.46 times the velocity?
The momentum the bicycle would have if it had 8 times the mass and was moving with 0.46 times the velocity is 58.88 kg m / s
p = m v
p = Momentum
m = Mass
v = Velocity
Initially,
p = 15 kg m / s
m v = 15
Finally,
m' = 8 m
v' = 0.46 v
p' = 8 m * 0.46 v
p' = 3.68 m v
p' = 3.68 p
p' = 3.68 * 16
p' = 58.88 kg m / s
Therefore, the momentum the bicycle is 58.88 kg m / s
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Atronaut in training i ubjected to extreme acceleration force by the centripetal force in againt centrifuge. The radiu of the centripetal i approximately 5m. A) calculate the approximate centripetal force of an atronaut of ma 80kg if the centrifuge rotate once even 2econd. B) approximately how many time greater than the atronaut weight i the force
In a large centrifuge, the centripetal force accelerates the astronaut to a very high speed of 49.3 francs ms2 and 5.
Solution:
A. a c = omega2 r = frac4 pi 2 r, T2 = 49.3 frac ms2, and a c = 2 r = T 2
4π \s2 \s r \s \s = 49.3 m\s²
B. frac = k = F aP=\frac{a c}
g = 5.k = P \sF \s\s = \sg \sa \ \s = 5.
Centripetal force is the component of force acting on a body in curvilinear motion and directed towards the axis of rotation or center of curvature. Centrifugal force is the simulated force of circular motion acting along the radius and away from the center of the circle. The centrifuge simulates weightlessness and gravity aboard the space station, allowing substances such as plasma, red blood cells, and white blood cells to be separated from blood samples.
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Light-rail systems have been tried all over the country, and they've failed. Although the people who support them have noble intentions, sadly, the system the city proposes is doomed to fail as well. People simply enjoy their cars too much to endure any inconvenience for the sake of the environment. And I don't blame them. As the owner of Jake's Used Cars and Trucks, I have seen the joy and freedom car ownership brings people. Americans will never abandon that feeling for the sake of being slightly better citizens. I believe it is far more responsible to purchase a high-quality car with good fuel efficiency. Building an entire light-rail system from the ground up, as the city proposes to do, will be more wasteful in the end if nobody uses it — not to mention that it will take years to build and cost taxpayers millions of dollars. I encourage all city residents to vote against the light-rail system on May 1. Which statement best describes the author's point of view? A. The author thinks Americans should be more environmentally responsible. B. The author wants citizens to visit his car dealership. C. The author is opposed to the light-rail project. D. The author would like the city to implement its project successfully.
The author's best argument against the light-rail project is that it is unnecessary. A combination of trams characterizes light rail transit, a type of passengers urban rail transportation.
What does light rail accomplish?In big cities, LRT can function as an independent organization or as a complement to heavy rail and passenger rail systems. The fastest and most economical interurban transport in a city is provided by LRT.
What does light rail accomplish?Heavy rail systems can be supplemented by LRT, and commuter rail networks in big cities can function independently. In a metropolitan area, LRT offers the fastest and most affordable interurban transportation service. It is intended to close a considerable gap between light rail and local buses.
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When calcium oxalate dissolves in water, what will happen to the temperature of the water?.
(CaC₂)O₄. H₂O decomposes under heat in three distinct steps, as the total reaction equation is depicted below. To create anhydrous calcium oxalate,
step 1 includes the loss of water through crystallization. In step 2, calcium oxalate thermally breaks down to calcium carbonate while losing carbon monoxide.If they are insoluble in acetic acid and caustic alkali, soluble in hydrochloric and sulfuric acid without effervescence, and display a progressive separation of needle-like calcium sulphate crystal when mixed in a 50% sulfuric acid solution, they can be classified as calcium oxalate.It burns in air or pure oxygen to form the oxide and reacts rapidly with warm water (and more slowly with cold water) to produce hydrogen gas and calcium hydroxide. On heating, calcium reacts with hydrogen, halogens, boron, sulfur, carbon, and phosphorus.To know more about decomposes
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Distance equals speed divided by time.
True
False
Answer:
False
Explanation:
speed / time = rate
rate * time = distance
A physicist makes a cup of instant coffee in a straight-sided cup with a diameter of 7. 00 cm by pouring in coffee crystals and then adding hot water to a volume of 350 cm3. As the temperature decreases from 95. 0 °c to 45. 0 °c, the height of liquid in the cup decreases by 3. 00 mm. How much of this height change can be attributed to the temperature change?.
The temperature of the system will change 51.71 ⁰C.
The equilibrium temperature of the system depends on the heat released from hot water. The total heat received by the system will equal to total heat released by objects. It should follow
Q released = Q received
The heat can be defined by
Q = m . c . ΔT
where Q is heat, m is mass, c is the specific heat constant and ΔT is the change in temperature.
The given parameters are
V = 350 cm³
d = 7 cm
R = 3.5 cm
ΔT1 = 95 - 45 = 50 ⁰C
Since the heat is the same, the change in temperature will be inversely proportional to the mass of the hot water. Hence,
ΔT ~ 1 / m
ΔT ~ 1 / V
ΔT ~ 1 / h
Find the initial height of cup
V = πR² . h1
350 = π . 3.5² . h
h1 = 100 / 3.5π
h1 = 9.09 cm
Find the final height of cup
h2 = h1 - 0.3
h2 = 9.09 - 0.3 = 8.79
Hence, the change in temperature will change
ΔT2 / ΔT1 = (1 / h2) / (1 / h1)
ΔT2 / 50 = (1 / 8.79) / (1 / 9.09)
ΔT2 = 51.71 ⁰C
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what is the connection between the variations in the cmb and the large scale structure and dark matter
Because primordial baryonic density fluctuations would have to be extremely large for the vast majority of galaxies we observe in the cosmos to emerge without dark matter, the adiabaticity of CMB fluctuations actually leads to dark matter.
The smooth early Universe and the bumpy older Universe are connected by the CMB. The CMB is fairly homogeneous overall, yet there are small temperature differences or anisotropy. These temperature variations match changes in the universe's matter density at the time the CMB formed.
Up to 90% of the matter in the cosmos may be dark matter or invisible matter. Many astronomers and physicists have proposed a number of explanations for this dark matter. It might just be common material, like dust strewn over the universe, frigid gas, big or small black holes, or ultra-faint stars that produce or reflect too little radiation for our equipment to detect. It might possibly be made up of strange, exotic particles that we are unable to perceive.
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A guitar string of length 30 cm and stretched under a tension of 78 n has a certain fundamental frequency. How long would a pipe, open at both ends, need to be to play the same fundamental frequency? a 15-cm long piece of the guitar string has a mass of 0. 4 g. The speed of sound in air is 340 m/s.
0.6 m long would a pipe, open at both ends, need to be to play the same fundamental frequency .
What is frequency ?
Frequency, in physics, the number of waves passing through a fixed point in a unit of time. Also, the number of cycles or oscillations per unit time experienced by an object in periodic motion. An object in periodic motion is said to undergo a cycle or oscillation after returning to its original state through a series of events or positions. See also angular velocity. A simple harmonious movement.
If the period or time interval required to complete a cycle or oscillation is 0.5 seconds, the frequency is 2 times per second. If the period is 1/100 hour, the frequency is 100 per hour. In general, frequency is the reciprocal of duration or time interval. That is, frequency = 1/duration = 1/(time interval). The frequency of the moon's orbit around the earth is just over 12 cycles per year. His A string on the violin has a frequency of 440 vibrations or cycles per second.
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in a liquid with a density of 1100 kg/m3 , longitudinal waves with a frequency of 430 hz are found to have a wavelength of 7.80 m . calculate the bulk modulus of the liquid.
The bulk modulus of the liquid is 13.31 GPa.
The bulk modulus of a substance is the degree of ways immune to compression the substance is. it's miles defined because of the ratio of the infinitesimal stress boom to the ensuing relative decrease of the volume.
Young's Modulus is the ability of any fabric to withstand the change along its duration. Bulk Modulus is the potential of any fabric to face up to the alternate in its extent. once in a while known as incompressibility, the majority modulus is a degree of the potential of a substance to withstand changes in extent while underneath compression on all aspects. it is the same to the quotient of the implemented strain divided by the relative deformation.
Calculation:-
ρ = 1300 kg/m3 , f = 400 Hz , \small \lambda = 8 m
We know that speed can be given as :
v = \small \lambda*f
i.e. calculating speed as :
v = (8 m)*(400 Hz) = 3200 m/s
The relation between speed, Bulk modulus, and density is :
v = \small \sqrt(K/\small \rho)
Calculating Bulk modulus as :
K = v2*\small \rho
= (3200 m/s)2*(1300 kg/m3)
= 13.31× 109 Pa = 13.31 GPa
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\ta car of mass 2000 kg moves 600 m due east in 10 seconds. what is the average momentum of the car during those 10 seconds?
The average momentum of the car moving due east in 10 seconds is
12 x 10⁴ kgm/s.
the mass of the car, m = 2000kg
distance covered by a car in each direction, s = 600m
time taken by the car, t = 10 second
The velocity of the car = ds/dt
velocity = 600/10
velocity = 60m/s
momentum of the car is calculated as :
P = mv
where
P = momentum of the body
m = the mass of car
v = the velocity of car
P = 2000 x 60
P = 120000 kgm/s
P = 12 x 10⁴ kgm/s
The average momentum of the car moving due east in 10 seconds is
12 x 10⁴ kgm/s.
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A helical compression spring is wound using 2.5-mm-diamcter music wire. The spring has an outside diameter of 31 mm with plain ground ends, and 14 total coils. a. Estimate the spring rate. b. What force is needed to compress this spring to closure? c. What should the free length he to ensure that when the spring is compressed solid the torsional stress does not exceed the yield strength? d. Is there a possibility that the spring might buckle in service?
162.8 mm is spring rate.
What is Spring Rate?
The term "spring rate" describes how much force is required to compress a spring by one inch. If the spring's rate is linear, the weight applied to it has no impact on the spring's rate. For instance, a spring with a 200 lb. per inch capacity will compress by 1" when a 200 pound. load is applied to it. The spring will compress by another inch if 200 lbs. more are applied. The spring is now carrying a 400 lb weight. However, the spring's rate, which is 200 lbs. per inch, does not change.
k= 8D 3 N ad 4 G
= 8(28.5 3 )132.5 4 (81)10 3
=1.314 N/mmL 0
= kF s+L s
1.314167.9+35
=162.8 mm
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Please help it’s argent I’ll give crown thing to first and thanks and points pleaseeee
Answer:
the answer is b
Explanation:
leading threat factors include habitat loss disease, invasive species, over exploitation, and chemical pollution these match up with B
Answer: Climate change, thinning of the ozone, pollution, disease
Explanation: Have a good day :)
A runner exerting a running force of 325 n to the right is met with an air resistance force of 45 n to the left. What is the net force of the runner?.
The net force of the runner, given the data from the question is 280 N.
What is net force?
The net force is the vector sum of forces acting on a particle or object.the net force is a single force that replace the effective of the original forces on the particles motion.
Sol-As per the given question the following data are obtained-
Exerting force = 325 N
Resistance force = 45 N
Net force =?
The net force of the runner can be obtained as illustrated below:
net force = Exerting force - resistance force
net force = 325 - 45
net force = 280 N
From the calculation we can get the runner's net force is 280 N.
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a 20.0 cm wrench is used to generate a torque at a bolt. a force of 50 n is applied at the end of the wrench at an angle of 60.0 degrees to the wrench. the torque generated at the bolt is
A 20.0 cm wrench is used to generate a torque at a bolt. A force of 50 n is applied at the end of the wrench at an angle of 60.0 degrees to the wrench. the torque generated at the bolt will be 8.6 N-m
Torque = F d sin(theta)
= 50 * 0.2 * sin ( 60 )
= 8.6 N-m
Torque will be 8.6 N-m
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You see a flash of lightning, and then 15 seconds later you hear thunder. How far away is the lightning?.
If you calculate the seconds between the lightning strike and divide that number by 5, you'll find the distance in miles: 5 seconds = 1 mile, 15 seconds = 3 miles, and 0 seconds = very close.
What is a lighting flash?The return stroke happens when a charged president makes contact with the ground. The quick discharge the electricity that has built up on the leader is all that happens during the return stroke. This discharge resembles a lightning bolt to us.
What causes lightning to flash?A stepped leader, or a channel of negative charges, travels towards the ground during the beginning of a cloud-to-ground lightning strike. The stepped leader keeps moving downhill in a sequence of steps that really are each between 50 and 100 meters long. The stepped leader might take many different turns.
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Calculate the energy needed to raise the temperature of 0.5 kg of lead (specific heat capacity of 130 J/kg °C) from 20.0 °C to 30.0 °C
The energy needed to raise the temperature of 0.5 kg of lead (specific heat capacity of 130 J/kg °C) from 20.0 °C to 30.0 °C will be 650 J
Specific heat capacity refers to the heat capacity per unit mass of a pure substance.
heat energy = ?
mass = 0.5 kg
specific heat capacity = 130 J/kg °C
Rise in temperature = (30 - 20 ) = 10° C
Q = m*c*T
= 0.5 * 130 * 10 = 650 J
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a crate of eggs is located in the middle of the flat bed of a pickup truck as the truck negotiates an unbanked curve in the road. the curve may be regarded as an arc of a circle of radius 43-m. if the coefficient of static friction between crate and truck is 0.53, what must be the maximum speed of the truck if the crate is not to slide?
The maximum speed of the truck if the crate is not to slide if the coefficient of static friction between crate and truck is 0.53 is 14.95 m / s
Fc = m v² / r
f = μ N
Fc = Centripetal force
m = Mass
v = Velocity
r = Radius
f = Frictional force
μ = Co-efficient of friction
N = Normal force
∑ Fy = 0
N - m g = 0
N = m g
μ = 0.53
r = 43 m
∑ Fx = m ax
f = m ac
μ m g = m v² / r
0.53 * 9.8 = v² / 43
v² = 223.34
v = 14.95 m / s
Therefore, the maximum speed of the truck if the crate is not to slide is 14.95 m / s
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A solid silver spoon has a mass of 65.1g.
The volume of the spoon is 6.2cm³.
Calculate the density of silver.
Answer:
10.5
Explanation:
Density= Mass/volume
= 65.1/6.2
= 10.5
2) a negatively charged particle is moving to the right, directly above a wire having a current flowing to the right, as shown below. in which direction is the magnetic force exerted on the particle? 2) a) out of the page b) upward c) downward d) into the page e) the magnetic force is zero since the velocity is parallel to the current.
If a negatively charged particle is moving to the right, the current in the wire also flows to the right, then the direction of the magnetic field will be upward due to maxwell's right-hand thumb rule.
Maxwell's Right-Hand Rule of Thumb:
Following this rule, imagine grasping a live wire with your right hand, with your thumb pointing in the direction of the current. The direction in which the finger grips the wire is the magnetic field lines around the wire. The right-hand rule used to find the direction of the magnetic field due to the current element is the direction of the magnetic field.
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Which law do astronomers use to determine the masses of the stars in a spectroscopic binary system?.
Kapler's 3rd law use to determine the masses of the stars in a spectroscopic binary system by astronomers.
A star's mass (the amount of matter it contains) is one of its most important properties. As we'll see, knowing a star's mass allows us to estimate how long it will last and what its ultimate fate will be. However, it is very difficult to directly measure the mass of stars. The mass of the binary system can be estimated using Newton's formulation of Kepler's third law (described in Newton's Law of Universal Gravitation). Kepler discovered that the time it takes a planet to orbit the Sun is related to its distance from the Sun by a specific formula. When two bodies rotate relative to each other in a binary situation, the period (P) in which they orbit each other is related to the semimajor axis (D) of one of its orbits. Formula is D³ = ( M₁ + M₂ ) P²
where D is in astronomical units, P is in years, and ( M₁ + M₂) is the sum of the masses of the two stars in solar mass units. This is a very useful formula for astronomers. If we can observe the size of the orbits of the stars and the period of their mutual rotation in a binary system, we can calculate the sum of their masses.
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assuming 25% human efficiency, how many flights of stairs could a 65-kg person climb using the energy in the snickers bar? assume a flight of stairs is 2.7 m.
The answer is 1.64 dietary calories.
Solution:
Mass of the person (m) = 65 kg
height of the Stains (h) = 2.7m
Potential energy
U= mgh
U= 65X9.8x2.7
U = 1719.9 J
25% human efficiency
n = 25%.
The energy required to do this work
W = 1719.7/25%.
W = 17199x100/25%
W = 6879.6 Joule
4186 Joule = 1 dietary calorie
1 Joule = 1/4186 dietary calorie
6879.6 Joule = 68796/4186 dietary calorie
So, the Energy of snickers bay = 1.64 dietary calories.
The human body is one of the most efficient chemical factories in the world. By taking and incorporating raw chemicals into the complex chemical structures that machines need to function properly, we can manufacture chemicals of an extremely complex nature required for bodily function. By streamlining your day-to-day operations you can improve productivity increase output and eliminate time-consuming administrative tasks.
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If car A moves toward west at 30 m/s, and car B moves toward west at 50 m/s, what's the relative velocity of car A with respect to car B?
The relative velocity of car A with respect to car B is -20m/s.
What is velocity?This refers to the movement of an object/body showing its direction. It is measured in meters per second, m/s.
What is relative velocity?This refers to the difference in velocities between two points.
From the question :the velocity of car A= 30 m/s
the velocity of car B= 50 m/s
Calculating the relative velocity of car A with respect to car B:relative velocity of car A with respect to car B =velocity of car A -velocity of car B
relative velocity of car A with respect to car B = 30 m/s - 50 m/s
=-20m/s
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Mike runs horizontally off a cliff at 6.5m/s and lands in the water 15m from the base of the cliff how long does it take mike to hit the water?
Answer:
Explanation:
Given:
V = 6.5 m/s
D = 15 m
_________
t - ?
t = D / V = 15 / 6.5 ≈ 2.3 s
