FIR201 Assignment 2A

What is the specific gravity of unknown liquid if you know that h=12.9 cm? Unknown liquid h cm 95 cm WATER 50 cm DI

APPLICATIONS OF FIRST ORDER DIFFERENTIAL EQUATIONS Newton’s Law of Cooling and Joint Proportions   At 4:00pm, a thermometer reading of 28 deg C is taken outside where the ambient temperature is –11 deg C. At 4:05 pm, the thermometer reads 8 deg above zero. After a while, the thermometer is returned to the room maintained at 28 deg C. At 4:12pm, the thermometer reads 15 deg C. When was the thermometer returned to the room?

Identify the equations that go with these concepts: Conservation of Energy (for conservative forces) b. Work-Energy Principle C. Force of gravity for an object near the surface of the Earth Force of gravity for an object far from the surface of the Earth d. T1+ V1 = T2+ V2 T1 + U1->2= T2 F = mg F= (GMm)/r^2

2. (Inspired by a walk in Baker Student Center.) An escalator handles a steady load of 30 people per minute taking them from the first to the second floor through a vertical rise of 24 feet. Let us say the average person riding the elevator weighs 160 lb. a. What output power on a motor do you require to drive the unit? Take literally one minute to find an electric motor online that could do this job. You can search “_ hp electric motor" and state the motor name, power, cost, and vendor. Of course, round up your hp, not down to meet your specs. (In practice, this is an area where you can spec the motor in equivalent Watts, if you choose.) b. What is the electric power that is input to the motor considering losses within the escalator system due to friction, vibration, etc.? Your chosen motors surely have a different efficiencies and sources may even present efficiency as a function of power/rpm, so let's all use the value of e= 0.85 for consistency.

Imagine that as an engineering intern you have been assigned the task of selecting a motor for a pump. After reviewing motor catalogs, you narrow your choice to two motors that are rated at 1.5 kW. Additional information collected is shown in an accompanying table. The pump is expected to run 4200 hours every year. After checking with your electric utility company, you determine the average cost of electricity is about 11 cents per kWh. Based on the information given here, which one of the motors will you recommend to be purchased?

1. In general, what pattern do you notice between the force due to the gravity of the masses and the displacement of the spring? 2. What is the physical meaning of the slope? 3. Using the slope for each spring, what would be the force required to stretch the spring 0.10 m? 4. Using the slope for each spring, what would be the amount of stretch with a 500 g mass hanging on the spring? Ps: pls refer to the graph below

How do you determine how much it will cost for electricity per year for the Nissan Leaf

thermodynamics   Ten kilogram of water us mixed with 12 kilogram of alcohol (SG=0.9).What is the specific gravity of the mixture, assuming that two fluidsmix completely.

Are you as strong as a horse? Purpose: To understand the concept of work and power and to calculate the power generated by yourself or a friend. Materials: A tape measure, stairs, and a stopwatch, cell phone, or wristwatch. Key Physics Concept: Power is the rate of doing work. Power can be calculated by dividing the work done by the time it takes to do the work; in this case we will do work against gravity on a stair case (you may add your power in doing pushups to test your arm power). Can you guess what your peak horsepower is? You may do the stairs one at at time or multiple stairs at a a time; whatever is most safe and efficient for you. Procedure: Observations: Analysis: Conclusions: Application: 1. Will your hp change if you performed the activity for a longer duration (for example, climbed the CN tower staircase)? In what way? Explain. 2. Research the horsepower generated by a car. How does the average person's peak power rating compare to it? How many average people would it…

Fbd +explanation

Fluid mechanics -turbines

account_circle   Science PhysicsQ&A LibraryA child’s toy consists of a m = 31 g monkey suspended from a spring of negligible mass and spring constant k. When the toy monkey is first hung on the spring and the system reaches equilibrium, the spring has stretched a distance of x = 17.6 cm, as shown in the diagram. This toy is so adorable you pull the monkey down an additional d = 7.6 cm from equilibrium and release it from rest, and smile with delight as it bounces playfully up and down.  1. Calculate the speed of the monkey, ve, in meters per second, as it passes through equilibrium.  2. Derive an expression for the total mechanical energy of the system as the monkey reaches the top of the motion, Etop, in terms of m, x, d, k, the maximum height above the bottom of the motion, hmax, and the variables available in the palette.   3. Calculate the maximum displacement, h, in centimeters, above the equilibrium position, that the monkey reaches. A child’s toy consists of a…

A husband and wife take turns pulling their child in a wagon along a horizontal sidewalk. Each exert a constant force pulls the wagon through the same displacement. They do the same amount of work,but the husband's pulling force is directed 58grades above the horizontal , and the wife's pulling force is directed 38 grades above the horizontal. the husband pulls with a force whose magnitude is 67N. WHat is the magnitude of the pulling force exerted by his wife? 1)sketch of the problem including everything? 2) 3 laws and principle in this problem?

University of Babylon Collage of Engineering/ Al-Musayab Department of Automobiles Final Examination/ Stage: 3rd Notes: Answer 4 questions only 2023-2202 Subject: Theory of vehicles Date: 2023\06\10-Saturday Time: Three Hours Course 2nd Attempt 1st Q1: A Hooke's coupling connects two shafts whose axes are inclined at 30°. The of the driven shaft? Find the maximum value of retardation or acceleration and driving shaft rotates uniformly at 600 rpm. What are the extreme angular velocities state the angle where both will occur. (12.5 Marks) Q2: Four masses, A, B, C, and D), revolve at equal radii and are equally spaced along a shaft. The mass B is 7 kg, and the radius of C and D make angles of 90° and 240°, respectively, with the radius of B. Find the magnitude of the masses A, C, and D and the angular position of A so that the system may be completely balanced. (12.5 Marks) Q3: A cam has straight worked faces that are tangential to a base circle of diameter 90 mm. The follower is a roller…

Problem 2.3 The following problem can be solved using the generalized conservation and accounting principle to determine if a recycling plant is profitable annually. Operating information: ● ● The plant operates 9 hours each day, 5 days each week, and 48 weeks each year. The plant purchases 30 tons of aluminum (at a rate of $0.02/lb) during each operating week. The plant has 5 full-time employees who are paid $18 per hour. All employees work during all of the plant's operating hours. The plant produces 7 bales of recycled aluminum per day, which it sells for $950 per bale. [Note: 1 ton = 2000 lb] Answer the following questions: (c) In order to determine the plant's annual profitability, would one be interested in studying the instantaneous rate of change in "stuff" (i.e. rate form) or the total change in "stuff" over an interval (i.e. finite-time form)? (d) On a system diagram (hint: think dashed lines!), use labeled arrows to identify each individual input and output of "stuff". (e)…

Problem 2.3 The following problem can be solved using the generalized conservation and accounting principle to determine if a recycling plant is profitable annually. Operating information: ● ● The plant operates 9 hours each day, 5 days each week, and 48 weeks each year. The plant purchases 30 tons of aluminum (at a rate of $0.02/lb) during each operating week. The plant has 5 full-time employees who are paid $18 per hour. All employees work during all of the plant's operating hours. The plant produces 7 bales of recycled aluminum per day, which it sells for $950 per bale. [Note: 1 ton = 2000 lb] Answer the following questions: (a) Identify the system (in words). (b) Identify the "stuff" you are accounting for in this analysis. (c) In order to determine the plant's annual profitability, would one be interested in studying the instantaneous rate of change in "stuff" (i.e. rate form) or the total change in "stuff" over an interval (i.e. finite-time form)? (d) On a system diagram (hint:…

how do i do number 1

University of Babylon Collage of Engineering\Al-Musayab Department of Automobile Engineering Under Grad/Third stage Notes: 1-Attempt Four Questions. 2- Q4 Must be Answered 3-Assume any missing data. 4 تسلم الأسئلة بعد الامتحان مع الدفتر Subject: Mechanical Element Design I Date: 2022\01\25 2022-2023 Time: Three Hours Course 1 Attempt 1 Q1/ Design a thin cylindrical pressure tank (pressure vessel) with hemispherical ends to the automotive industry, shown in figure I below. Design for an infinite life by finding the appropriate thickness of the vessel to carry a sinusoidal pressure varied from {(-0.1) to (6) Mpa}. The vessel is made from Stainless Steel Alloy-Type 316 sheet annealed. The operating temperature is 80 C° and the dimeter of the cylinder is 36 cm. use a safety factor of 1.8. Fig. 1 (15 Marks) Q2/ Answer the following: 1- Derive the design equation for the direct evaluation of the diameter of a shaft to a desired fatigue safety factor, if the shaft subjected to both fluctuated…

Recall the discussion on spacecraft from the chapter opener. The following problems consider a rocket launch from Earth’s surface. The force of gravity on the rocket is given by F(d)=−mk/d2, where m is the mass of the rocket, d is the distance of the rocket from the center of Earth, and k is a constant. 172.  As the rocket travels away from Earth’s surface, there is a distance D where the rocket sheds some of its mass, since it no longer needs the excess fuel storage. We can write this function as F(d)=⎨(−m↓1 k / d^2) if d < D                                                                                  (−m↓2 k / d^2) if d ≥ D Is there a D value such that this function is continuous, assuming m1≠m2?

F V A crate of mass 2 kg is being lifted by a force described as F= 2s + 25 where s is displacement in meters. What is the velocity after the crate is lifted 11 m (s = 11 m)? m F S UBC Engineering

I want to briefly summarize what he is talking about and what you conclude. pls very urgent