Week8Quiz_Solutions

This is a practice hw question not graded!!

! Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. At an intersection car B was traveling south and car A was traveling 30° north of east when they slammed into each other. Upon investigation, it was found that after the crash, the two cars got stuck and skidded off at an angle of 10° north of east. Each driver claimed that he was going at the speed limit of 50 km/h and that he tried to slow down, but couldn't avoid the crash because the other driver was going a lot faster. The masses of cars A and B were 1500 kg and 1200 kg, respectively. 10° 30° VR Determine the speed of the faster of the two cars if the slower car was traveling at the speed limit. The speed of the faster car was km/h.

Mech. Engg. Dept. 4th year 2022-2023 Solar Energy Spring course MEC364 Dr. Mahmoud U. Jasim Review/Recap Sheet Q1- Answer with true or false and rewrite the false statements completely in correct form, otherwise no mark will be put on the false statements. 1 2 To represent a location on earth surface you need to define its altitude and longitude angles. 3 Solar zenith and solar incidence angles have the same value for horizontal surface. At sunset time the value of solar altitude angle is maximum. 4 The angle which represents the inclination of a given surface is the zenith angle 5 6 7 8 When the absolute value of sun-wall azimuth angle exceeds 90' this means that the sun rays are reaching the receiving plane. The solar irradiance and the solar irradiation have the same physical meaning. In the case of clear sky weather, the beam solar irradiation on a horizontal surface is less than the diffused irradiation. The total solar radiation received by a tilted surface is the same as that…

Which of the following statement is not correct? O a. A bus going down the valley may have variable acceleration. O b. A lift going down in a gold mine canrnot have constant acceleration in the entire Journey. O c. In a cricket match, the ball does not move with constant acceleration. O d. A body falling freely under the force of gravity is an exarmple of motion under variable acceleration. Question 12 Not vet

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Question 11) Roger gave the following account of a roller-coaster ride: 1 tried a brand-new ride at a science centre. There's a computer screen that tells you how much the car and the people in it weigh and how high and fast you travel. You get into the car and they strap you in. The car weighs 600 kg. At the top, it moves horizontally at a speed of 1 m/s. Then you drop 30 m, make a loop into the air and finish by riding over an 8-m hill. I don't remember our maximum speed or our speed at the top of the loop, but the ride was fantastic!" Answer the following questions without taking the force of friction into consideration. Show your calculations for each question. A v=1 m/s 20 m 8 m a) What is the highest speed Roger could have attained? What is the potential energy of the roller-coaster car when it is at the top of the b) loop? c) What is the kinetic energy of the car as it passes over the top of the 8 m hill? d) What is the total mechanical energy of the system?

SUBJECT: PHYSICS

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Help with physics review problem

Which of the following is NOT an advantage of Sea Launch for putting communications satellites into orbit? Launch vehicles need to be huge because they need     to be big enough to show up on mission control's radar screens     to have spacious interiors to make room for huge crew cabins     to be able to carry their payloads across interplanetary distances     large, powerful engines to overcome the Earth's gravity and atmospheric drag

What is the required diameter in meters of a cylindrical tank which has a length of 3 meters used for oil storage that will supply the engine for 5 days having a fuel consumption of 60Kg/hour at 27 degrees API? Please Answer # 9. If you can answer # 10 it will be appreciated much and rated high. Thanks!

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What happens to an object's motion when the forces are balanced? Group of answer choices The object will accelerate. The object could be at rest or moving at a constant velocity. The object MUST be moving at a constant velocity. The object MUST be at rest. What is the correct choise

Question 23 Given an initial velocity of o ft/s, what is the velocity at 5 seconds? -2 Time (s) -1 ft/s 1 ft/s -11 ft/s 11 ft/s Not enough information Acceleration (ft/s²)

Case Study: Paula’s Pain Paula has worked for Brindle Corporation for 3 years.  During this time, she has worked as a machine operator/cell leader in various work cells.  Recently, the plant went to mandatory 12-hour shifts and plans to remain on this schedule for several months. Paula’s present work cell is manufacturing 3-inch diameter exhaust tubes that are made from stainless steel.  These tubes get a hole punched in them, a flange welded on, and burrs ground off.  The pipe then gets placed into a gage to check that it was made correctly.  (The tubes weigh about six pounds.) Paula has been performing the welding operation.  She leans into the machine and loads the part into a fixture then positions the flange.  Both pieces are clamped (using hand clamps) into position and the machine is cycled by depressing two palm buttons. The gaging operation requires placing the finished part into the gage and clamping it (using hand clamps) into place. A pin is depressed to verify the position…