The cost fuel in running a locomotive is proportional to the square of the speed and is $25 pe hour for a speed of 25 miles per hour. Other costs amount to $100 per hour, regardless of th speed. What is the speed which will make the cost per mile a minimum?

Q: If the density of air is a constant 1.29 kg/m^3, how high does the Earth's atmosphere go if the…

A:

Q: 10.0 m. Y 500 N T₁ 3.0 m 6.0 m X

A:

Q: Review Conceptual Example 5 before attempting this problem. To illustrate the effect of ice on the…

A:

Q: [P,P2] = -iħ o -1 O ih o o

A: Ques:

Q: Two horses are pulling a barge with a mass 4000 kg along a canal, as shown in Figure 4.8 in the…

A:

Q: A 60 kg woman rides an amusement park ride in which the 190 kg car traverses a circle of radius R =…

A:

Q: In the figure the ideal batteries have emfs E1 = 4.89 V and E2 = 10.2 V, the resistances are each…

A: This problem can be solved by finding equivalent resistance. resistances R4 & R5 are in parallel…

Q: (20%) Problem 5: Three capacitors with capacitances C₁ = 10C, C₂ = 5C, and C3=2C are connected in…

A: Given: In this question, the given details are, Three capacitors with capacitance are connected in…

Q: Richard is a Civil Engineer at a construction site building the launch pad for NASA/Boeing's Space…

A: Given: Charge,Q1=850μC=850×10-6CCharge,Q2=110μC=110×10-6CMass,m=0.2kgDistance between the…

Q: The liquid in the open-tube manometer in the figure is mercury, y₁= 3.00 cm, and y₂= 7.00 cm.…

A: Pressure at the depth of h is given as P = ρgh

Q: Juan is a Software Engineer for the Department of Water and Power (DWP), which stores LA's water in…

A:

Q: 5. A sheet of construction paper measures 20 mm by 15 mm, and the volume is 4 mm3, where V = lwt a.…

A: Volume is defined as the amount of space occupied by an object.

Q: A positive charge q,2.50 uC on a frictioniess horizontal surface is attached to a spring of force…

A: q1 = 2.50 μC q2 = -8.65 μC initial distance between two charges = 9.50 cm final distance between two…

Q: A solid sphere of total charge Q and radius R has a charge/volume p(r) = ar. a is a cor 1-3). 1.…

A: The volume charge density is given as ρ(r)=αr.  (a) The charge enclosed by the sphere is  Q=∫ρdτ…

Q: A closed box is filled with dry ice at a temperature of -89.2 C, while the outside temperature is…

A:

Q: 2. A golf cart battery holds about 1 kWh of energy. At an open air concert, the band uses the golf…

A: As per the guidelines we can solve only first question among multiple questions.Given, the energy of…

Q: A box of mass 50 kg is pushed along flat ground by a force with a magnitude of 200 N. If the…

A: Given, A force has pushed a box along the flat surface, where The mass of the box is m=50kg the…

Q: nd

A: Given: Length of copper rod is 0.53 m Mass of copper rod is 5×10-2kg Current is 13 A

Q: A force of magnitude P = 169 N is applied to the stationary machine handle as shown. Write the force…

A: Given:-  A force of magnitude of P = 169 N was applied to the machine handle. Find:-  Write the…

Q: 6. A uniform electric field 10 N/C exists in vertically downward direction, the increase in the…

A: Given, a uniform electric field exists vertically downward direction with a magnitude of 10 N/C…

Q: A metal sphere of radius 30 cm has a net charge of 30.0 nC. What is the magnitude of the electric…

A: Given: In this question, the given details are, A metal sphere of radius 30 cm has a net charge of…

Q: 0 Calculate the composition of a ZnS,Se1y alloy with a band gap of 2.75 eV, given that Eg Znse =…

A:

Q: Q15: A rock is thrown downward from the top of a 40.0-m- tall tower with an initial speed of 12 m/s.…

A: Given(s): The initial speed of the rock, u=12 m/s. The rock was thrown from a height of, h=40.0 m.…

Q: An arrangement of source charges produces the electric potential V=5000x2 along the x-axis, where V…

A: Given: Electric potential is V=5000×2 Charged particle is 15 nC Turning points at ±8.4 cm

Q: ed a

A: Given: Electric field is 12000 N/C Plate separation distance is 40 mm Initial speed is 2×107m/s

Q: A force F is applied to a 2.0 kg radio- model car parallel to the x-axis as along a straight track.…

A: To calculate the work done from the given graph, the following concept to be used. " The area under…

Q: A mass attached to a spring vibrates with SHM of frequency 4 Hz and amplitude 6 cm.What is the…

A:

Q: A long conducting cylindrical rod is inside a long conducting enclosure with a square cross- section…

A: The electric field is from higher potential to lower potential. The field lines are perpendicular to…

Q: In one of the classic nuclear physics experiments at the beginning of the 20th century, an alpha…

A: Given: In this question, the given details are, In one of the classic nuclear physics experiments at…

Q: What is the equivalent resistance in the circuit shown below? RA hamne tamto 12.0 N Rg Rc 60,0 V…

A: Given  RA=12Ω RB=25Ω RC=15Ω

Q: The block in the drawing has dimensions LO×2L0×3L0.where Lo =0.3 m. The block has a thermal…

A: Give Thermal conductivity = 100j/s-mC  Delta T = 21- 12 ° C = 9 ° c

Q: checoefficient of ki

A: Given: Mass of bundle is 6.2 Kg Angle is 21o Kinetic energy is 144 J Kinetic friction coefficient is…

Q: And r0 ?

A:

Q: A wire connected to a circuit and coiled into a loop is (O Points) magnetic field solenoid magnetic…

A: The wire coiled to use as the electromagnets is known as the solenoid. The electrical energy is…

Q: Light bulb 1 operates with a filament temperature of 2500 K, whereas light bulb 2 has a filament…

A: T1=2500k. T2=1900k.

Q: The plane is inclined at an angle of theta = 0 = 61 degrees away from vertical. The coefficient of…

A:

Q: 1 s are acting on a box of mass 7 kg. The first force has a magnitude of 13 N and is directed along…

A:

Q: The output voltage of an AC generator is given by Av = (1.21 x 102 V)sin(40zt). The generator is…

A: ∆V = (1.21 × 102V)sin(40πt)

Q: An electric generator contains a coil of 100 turns of wire, each forming a rectangular loop 50.0 cm…

A: Given, The number of turns, N=100 Rectangular loop length and breadth, a=0.5mb=0.3m Magnetic field,…

Q: The coil in a loudspeaker has 55 turns and a radius of 3.7 cm. The magnetic field is perpendicular…

A: Given: The given values are, The loudspeaker has n=55 turns. And the given radius is r=3.7 cm. Then…

Q: corr

A: Given: Weight of an object is W

Q: Q16: On another planet, a marble is released from rest at the top of a high cliff. It falls 4.00 m…

A: Using second equation of motion s = ut +0.5at2  => 4 = 0 + 0.5×a×(1)2 => a = 8 m/s2 Using…

Q: ▼ Y Part A Determine the magnitude of the tangential component of reaction of pin O on the rod at…

A:

Q: What is the charge carried by a 5 m long coaxial cable whose outer radius is 5 times larger than its…

A:

Q: The 3 kg block is initially at rest and pressed against a spring so as to compress it at point A.…

A:

Q: a. For the series circuit in Figure 2: a. Determine the total resistance Rr. b. Calculate the…

A: a. total resistance is RT=R1+R2+R3=1+3+2 kΩ=6 kΩ