A system with a mass of 8 kg, initially moving horizontally with a velocity of 40 m/s, experiences a constant horizontal force of 25 N opposing the direction of motion. As a result, the system comes to rest.
Determine the amount of energy transfer by work, in kJ, for this process and the total distance, in m, that the system travels.
Answers
Answer:
The kinetic energy is 6.4 kJ and the distance traveled by the system is 256 m.
Explanation:
Given the mass of the system is 8 kg.
And initially, it moves with a velocity 40 m/s.
Also, it experiences 25 N force which opposes its motion.
We need to find the kinetic energy and the distance traveled by the system before going to rest.
It will be the kinetic energy of 8 kg mass with 40 m/s velocity that is transferred to work.
Since this system is opposed by 25 N force, work done by the force will be.
And the kinetic energy transferred to work. We can equate them.
So, the system will travel 256 m.
Related Questions
Aluminum alloys are made by adding other elements to aluminum to im prove its properties, such as hardness or tensile strength. The following table shows the composition of ve commonly used alloys, which are known by their alloy numbers (2024, 6061, and so on) [Kutz, 1999]. Obtain a matrix algorithm to compute the amounts of raw materials needed to pro duce a given amount of each alloy. Use MATLAB to determine how much raw material of each type is needed to produce 1000 tons of each alloy. Composition of aluminum alloys Alloy %Cu %Mg %Mn %Si %Zn 2024 6061 7005 0 7075 356.0 0 0.6 0 0 0 0 4.5 5.6 0 0.6 0 0 2.5 0.3 0
A 100-mm-diameter cast Iron shaft is acted upon by a 10 kN.m bending moment, a 8 kN.m torque, and a 150 kN axial force simultaneously. The ultimate tensile strength of the shaft material is 210 MPa, and the ultimate compressive strength of the shaft material is 750 MPa, determine the safety factor against failure for the above types of loading using a proper theory of failure.
A 24.3-foot long pipe use to carry solvent through a chemical plant is made of two layers. The inner layer is a one-inch schedule 30 stainless steel (AISI 304) pipe. An outer coating is made of plain carbon steel and is 0.075 inches thick. The hot solvent stream can be assumed to have a constant temperature of 180.0oF as it passes through the pipe. On the outside of the pipe is air at 85.0oF. Given the solvent has a convective heat transfer coefficient of 275 Btu/h-ft^2-oF, while the air has a convective heat transfer coefficient of 140 Btu/h-ft^2-oF.A. Determine UA and q for heat transfer in this system. (Since the problem is given in English units, your answer should also be in English units) B. Determine the overall heat transfer coefficients, U; and U., for the pipe. C. Would your answer change if the two materials were swapped so that the inside material were carbon steel and the outside material of the pipe were made of AISI 304 stainless steel? If so, calculate new values for UA and q. If not, explain why your answer would not change. (Here, assume the dimensions of the inner material (now plain carbon steel) match those of the AISI 304 schedule 30 stainless steel from part A, and the stainless steel is 0.075 inches thick on the outside.)
Internal and external flow boiling regimes?
Answers
Answer:
(b) False
Explanation:
Isothermal process is a process in which temperature is constant ,heat can be transferred but temperature is constant and as the temperature is constant so internal energy is also constant
In other hand in adiabatic process there no transfer of heat and internal energy also changes
So the given statement is false statement
Required:
What is the average power consumption for Eager WiFi, Lazy WiFi, Eager 4G, and Lazy 4G?
Answers
The average power consumption for Eager WiFi, Lazy WiFi, Eager 4G, and Lazy 4G Split is maintained by Screen Mode.
Why reducing leads to increasing wages?
Reducing such a need to move in between multiple tabs, the split-screen has been valuable for increasing wages. In the several instances running a two or more desktop system will allow different programs to run throughout multiple devices. That works with the same process on both PC and laptop monitors.
Just display them side by side, instead of the switching among both the apps that has been used frequently. In this phase, an app that the snap to either left or right occupies a third of the display, and yet another app holds the two-thirds remaining. It refers to Split-Screen Mode.
Similarly, assume that the communication radio for 4G has a power consumption of 190 mW when active and 25 mW when idle. The Idle Power of the CPU is 7 mW, whereas the Active Power of the CPU is 5 mW per unit utilization.
Therefore, The average power consumption for Eager WiFi, Lazy WiFi, Eager 4G, and Lazy 4G Split is maintained by Screen Mode.
Learn more about average power on:
#SPJ2
Answers
Answer: Tl = - 13.3°C
the lowest outdoor temperature is - 13.3°C
Explanation:
Given that;
Temperature of Th = 21°C = 21 + 273 = 294 K
the rate at which heat lost is Qh = 5400 kJ/h°C
the power input to heat pump Wnet = 6 kw
The COP of a reversible heat pump depends on the temperature limits in the cycle only, and is determined by;
COPhp = Th/(Th - Tl)
COPhp = Qh/Wnet
Qh/Wnet = Th/(Th -Tl)
the amount of heat loss is expressed as
Qh = 5400/3600(294 - Tl)
the temperature of sink
( 5400/3600(294 - Tl)) / 6 = 294 / ( 294 - Tl)
now solving the equation
Tl = 259.7 - 273
Tl = - 13.3°C
so the lowest outdoor temperature is - 13.3°C
Answers
Answer:
Conduction is a heat transfer mechanism. It is the dominant heat transfer mechanism in solids and it involves the vibration of the molecules of the solid. As heat is transfered to one end of the solid, the molecules at that end start to vibrate and in this process, collides with the adjacent molecules setting it to vibrate too. Also free electrons around the solid atoms (especially in metals) contribute to this heat flow. The continuous vibration is transfered from molecule to molecule gradually along the solid until the average kinetic energy (a measure of temperature) of the molecules along the metal has increased.
Convection is the dominant heat transfer mechanism in fluids, it involves the complete movement of the fluid molecule from a hot spot in the fluid to a cooler spot in the fluid. For convectional movement to occur, the molecules must first come in contact with the heat and absorb the heat first by conduction. As the heat increases, the fluid molecules break from just vibrating about a fixed point to moving completely to a cooler spot due to buoyant forces (due to the difference in density of hot and cooler fluid molecules). This clearly point out the fact that convectional heat transfer is first conduction, and then complete later flow of the fluid molecules.
Answers
Answer:
(c)- Elastic modulus
Explanation:
We know that in tensile test we measure the properties of the material like yield strength,ultimate tensile strength ,Poisson ratio.
In tensile test
σ = ε E
Where σ is the stress
ε is the strain.
E is the elastic modulus.
Now for shear tress
τ = Φ G
Where τ the shear stress
Φ is the shear strain.
G is the shear modulus.
So we can say that Shear modulus is analogous to Elastic modulus.
Answers
Answer:
891.027 lbm/ft³
Explanation:
See it in the pic