Science

PhysicsQ&A LibrarySuppose a car travels 108 km at a speed of 35.0 m/s, and uses 2.10 gallons of gasoline. Only 30% of the gasoline goes into useful work by the force that keeps the car moving at constant speed despite friction. (The energy content of gasoline is 1.3 ✕ 108 J per gallon.) (a) What is the force exerted to keep the car moving at constant speed? (b) If the required force is directly proportional to speed, how many gallons will be used to drive 108 km at a speed of 28.0 m/s?Start your trial now! First week only $4.99!*arrow_forward*

Question

Suppose a car travels 108 km at a speed of 35.0 m/s, and uses 2.10 gallons of gasoline. Only 30% of the gasoline goes into useful work by the force that keeps the car moving at constant speed despite friction. (The energy content of gasoline is 1.3 ✕ 10^{8} J per gallon.)

(a) What is the force exerted to keep the car moving at constant speed?

(b) If the required force is directly proportional to speed, how many gallons will be used to drive 108 km at a speed of 28.0 m/s?

Tagged in

Science

Physics

Find answers to questions asked by students like you.

Q: Describe the given diagram and identify each dot whether the potential energy diagram is in stable, ...

A: Fig-1 , shows the variation of potential energy ,U, of a particle ,in one dimension, as function of ...

Q: Jack and Jill are both helping to fetch a pail of water in a hill that is 16 meters high. Each of th...

A: Given: mass of water m = 5 liter = 5kg distance travelled d = 16m time taken by Jack t1=1.5hrs time...

Q: Imagine that you are sitting in a chamber with your back to one wall. An electron beam, moving horiz...

A: The direction of the magnetic field can be determined using the Fleming’s Left hand rule. The direct...

Q: A wire is drawn through a die, stretching it to four times its original length. By what factor does ...

A: Given, Considering the original length of the wire as L, and new length as L1, L1=4L.

Q: A box is pressed against a horizontal spring, compressing the spring from its relaxed length. The bo...

A: SOlution:

Q: Protons in an accelerator at the Fermi National Laboratory near Chicago are accelerated to a total e...

A: (a) The energy of the proton is, E=γmc2=400mc2 The relativistic expression for speed u=c1-1γ2=c1-140...

Q: Two point masses 3 kg and 5 kg are at 4 m and 8 m from the origin on x-axis. Locate the position of ...

A: From the origin, if m1 is at a distance r1 and m2 is at a distance r2 then the center of mass of the...

Q: a) Use voltage division to determine the voltage v, across the 40 N resistor in the circuit shown. 3...

A: To determine: Voltage v0 Current through 40 Ω and 30 Ω resistor. Power absorbed by 50 Ω resistor.

Q: 4) A particle moves along with the path function s= 21 +1 in the form of the orbit y= 2×x. 7y (m) y=...

A: Click to see the answer

Q: Show that when a 3.0-kg book is lifted 2.0 m its increase in gravitational potential energy is 60 J.

A: Click to see the answer

Q: (a) A large rotating flywheel uniformly increases in angular speed from rest to 0.210 rev/s in 26.0 ...

A: a. in rotational mechanics, equation of motion for the given case can be expressed as ω=ω0+αt

Q: A basketball with a mass of 0.6kg is dropped from rest. Just before striking the floor. it has a mom...

A: Solution: as given that m= 0.6 kg p =3.1 kgm/s

Q: A "low-Earth orbit" refers to a satellite whose circular orbit is only slightly above the surface of...

A: Click to see the answer

Q: Consider the spring mass system defined by the differential equation mx" + kx = Fex: (t) If m=0.5 kg...

A: Click to see the answer

Q: At what angle will a ray be refracted in water if it originally travels from a glass, with an angle ...

A: Angle of incidence = 42 degree refractive index of water = 1.33 refractive index of glass = 1.5 Refr...

Q: A 500-g block of copper at a temperature of 80°C is dropped into 300 g of water at 30°C. The water i...

A: mass of copper = 500 g mass of water = 300 g mass of glass container = 200 g specific heat of copper...

Q: If a cup of coffee has temperature 95°C in a room where the ambient air temperature is 22°C, then, a...

A: Given data The ambient air temperature is given as T=22°C. The equation of temperature is given as ...

Q: What would the separation between two identical objects, one carrying 9 C of positive charge and the...

A: According to Coulomb's law of electrostatics, Force between two point charges q and Q separated by a...

Q: Which of the following is always true for a collision? Group of answer choices Kinetic Energy is co...

A: Consider the two objects which will collide as a system. During the collision of two bodies (elastic...

Q: Can i get help with this problem

A: g=Acceleration due to gravity=9.81 m/s2y=Displacement in y direction=0.06 mm=Mass of block=8 kgk=Spr...

Q: Semi-trailer trucks have an odometer on one hub of a trailer wheel. The hub is weighted so that it d...

A: Diameter of the wheel is d = 1.14 m Number of revolutions is n = 150000 So, perimeter (S) of the whe...

Q: A proton has a magnetic field due to its spin on its axis. The field is similar to that created by a...

A: radius circular current loop r=0.650x10-15m current in the loop 1.05x104A magnetic field of induct...

Q: A rectangular block of copper having dimensions 63.5 cm x 63.5 cm x 92 cm. If the resistivity of cop...

A: Click to see the answer

Q: A ping pong ball rolls at a speed of 0.60 m/s toward the edge of a table which is 0.80 m high. The b...

A: Horizontal velocity, u = 0.6 m/s height, h = 0.8 m

Q: Question 1: A 60 kg skier starts from rest at height H = 20 m above the end of a ski-jump ramp and l...

A: Given : Mass of a skier (m) = 60 kg Height (H) = 20 m Angle (θ) = 28°

Q: 3.3 a) Find the value of R that will cause 4 A of current to flow through the 80 N resistor ir the c...

A: 40 ohm and 80 ohm resistors are in series , their equivalent resistance = 40 + 80 = 120 ohm Total c...

Q: A 50.0-kg child stands at the rim of a merry-go-round of radius 2.85 m, rotating with an angular spe...

A: mass of child = 50 kg Radius = 2.85 m w ( angular speed) = 3.9 rad/sec

Q: Double collar C is articulated so that one of the rings slides on the stationary rod and the other o...

A: Click to see the answer

Q: For an RLC series circuit, R = 120N, L = 100 mH, and C = frequency is connected to the circuit, at w...

A: Click to see the answer

Q: T3 9.) A car requires 170kiloJoules to accelerate from 23m/s to 28m/s. If this happens over 2 second...

A: Power is defined as the rate of doing work. Power is a scalar quantity and the SI unit of power is W...

Q: Consider the wave function phi(x) = A sin(kx) where k = 2pi/lambda and A is a real constant. (a) Wha...

A: Click to see the answer

Q: A particle with charge 3 C is placed at the origin. Another particle, with charge 9 c, is placed 18 ...

A: charge present at origin = 3 C Charge present on x axis = 9 C position of second charge = (18,0) m ...

Q: An electron has a momentum with magnitude four times the magnitude of its classical momentum. (a) Fi...

A: Given:- An electron has a momentum with magnitude four times the magnitude of its cl...

Q: A deep sea diver should breathe a gas mixture that has the same oxygen partial pressure as at sea le...

A: Partial pressure of oxygen is (20.9/100)*1.01*105 N/m2 = 2.12*104 N/m2

Q: A large power plant generates electricity at 12.0 kV. Its old transformer once converted the voltage...

A: GIVEN : Vold=335 kVVnew=750 kV (a) Ratio of no. of turns in secondary coil : Ns,newNs,old=VnewVold P...

Q: 2. Jack and Jill are both helping to fetch a pail of vater in a bill that is 16 meters high. Each of...

A: Click to see the answer

Q: Two waves, y1(t) and y2(t), have identical amplitudes and oscillate at the same frequency, but y2(t)...

A: Click to see the answer

Q: A simple pendulum consists of a small object of mass 3.5 kg hanging at the end of a 2.0-m-long light...

A: Click to see the answer