3/186 A supertanker with a total displacement (weight) of 140(10®) long tons (one long ton equals 2240 lb) is moving forward at a speed of 2 knots when the en- gines are reversed to produce a rearward propeller thrust of 90,000 lb. How long would it take the tanker to acquire a speed of 2 knots in the reverse direction? Can you justify neglecting the impulse of water resistance of the hull? (Recall 1 knot 1 151 99 i lan

3/186 A supertanker with a total displacement (weight) of 140(10®) long tons (one long ton equals 2240 lb) is moving forward at a speed of 2 knots when the en- gines are reversed to produce a rearward propeller thrust of 90,000 lb. How long would it take the tanker to acquire a speed of 2 knots in the reverse direction? Can you justify neglecting the impulse of water resistance of the hull? (Recall 1 knot 1 151 99 i lan

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

A wheel tractor has a 200 HP engine. Calculate the available rimpull of this tractorif it is operating at an altitude of 1,000 m. above sea level, at an averagetemperature of 25oC, and at an average speed of 12 km/hr. Take rimpull efficiencyas 85%.
A highway curve with a radius of 120 m is banked so thatthere is no lateral pressure on the wheels of a car at aspeed of 48 kph. A car weighing 17.8 kN with 1.5-mdistance between its wheels and height h = 0.70 m travelsaround the curve at 96 kph. (a) What is the normal forceon the car’s outer wheels? (b) If friction is great enough toprevent skidding, at what speed would overturningimpend?
The super-container vessel has a total mass displacement of 23000 long tons. This vessel towed by a tugboat with α=20⁰ angle with horizontal. If a constant tension is applied as F=320 kN by the tugboat, please calculate the time to bring the vessel to a speed of 2 knot from the rest. At these low speeds, please neglect the hull resistance that created by the motion. Note: (1 long tons = 1016.05 kg, 1 knot=1.151 mi/hr= 0.5144 m/s)
A man holds and drops the two equal masses without moving his arm’s length on a rotating table then the angular velocity is
Block A with a weight of 100N (mA=10kg) moves to the right (vA=1 m/s) at the moment shown in the figure. Since the kinetic friction coefficient between the surface and block A is μk=0.2, find the speed of block B when it moves 2 meters its weight is 200N (mB=20kg)
The figure depicts two pucks on a frictionless table. Puck 2 is four times as massive as puck 1. Starting from rest, the pucks are pushed by two equal forces. 1-Which pucks will have the grater kinetic energy upon reaching the finish line? 2- Which puck will reach the finish time first ?
Two propellers of lengths and masses l, L and m, M rotate in the same direction, as shown in the figure. if the left propeller starts from rest, w1=0 and the right propeller starts with an angular velocity that the right propeller ends up with after both propellers have collided.
1. A wheel tractor has a 200 HP engine. Calculate the available rimpull of this tractorif it is operating at an altitude of 1,000 m. above sea level, at an averagetemperature of 25oC, and at an average speed of 12 km/hr. Take rimpull efficiencyas 85%.2. The weight of the wheel tractor in Problem 1 is 30 tons and the weight on the drivingwheels is 50% of this weight. What is the maximum available rimpull if thecoefficient of traction is 0.25?3. What is the maximum grade that the tractor in Problems 1 and 2 can climb if it ismoving on a surface with a rolling resistance of 150 kg/ton?4. Assume that the tractor in Problems 1, 2, and 3 is moving down a 8% grade. Howmany minutes are necessary to accelerate to the average speed of 5 km/hr in firstgear? Use a rimpull reduction factor of 75% in your calculations.
A wheel tractor has a 200HP engine.if it is operating at an altitute of 1000m above sea level, at an average temperature of 25 degree celcius, and at an average speed of 12km/hr. Calculate the available rimpull of this tractor. Take rimpull efficiency as 85%
The ship was traveling at 2.5 m/s toward the reef when a mechanical failurecaused the rudder to jam in the straight-ahead position. At that point in time, the shipwas 900 m from the reef. The wind was blowing directly toward the reef and exertinga constant force of 9.00 x 103 N on the boat in a direction toward the reef. The massof the ship and its cargo was 5.50 x 10 kg. During the preparation for the trial, thecaptain claims that without control of the direction of travel, the only choice he hadwas to put the engines in reverse at maximum power, such that the total force exertedby the frictional drag force of the water on the propeller was 1.25 x 10-N in a directionaway from the reef. From this information, construct a convincing argument thatnothing the captain could do in this situation could have prevented the sh fromstriking the reef.
A person tossed a headball up at an initial rate of movement of 15 m / s, and it rose and fell, and that person met it again. Find 1. How high does the ball reach? 2. What was her speed at the moment prior to being caught 3. How much time did the ball spend in the air?
A 100-ft3 /s wáter jet hits a horizontally lying stationary splitter, such that half of the mass flow is diverted one way and the other half is diverted the other way, and both streams have a uniform velocity of 18 ft/s. The deflection angle of the splitter is 45 degrees as shown. Obtain (a) the cross-sectional area of the jet and (b) the horizontal (x-y) components of the force required to hold the splitter in place.