The piston of a hydraulic automobile lift is 0.30 m in diameter. What gauge pressure, in pascals, is required to lift a car with a mass of 1200 kg? Also express this pressure in atmospheres. Answer: 1.7 atm
A 1130-kg car is held in place by a light cable on a very smooth (frictionless) ramp. The cable makes an angle of 31.0°C above the surface of the ramp, and the ramp itself rises at 25.0°C above the horizontal. (a) Draw a free-body diagram for the car. (b) Find the tension in the cable. …
How Hard Does The Surface Of The Ramp Push On The Car? Read More »
What three guidelines help management accountants provide the most value to managers? Answer Three guidelines that help management accountant to provide the most value to managers are: (1) employ a cost\u2013benefit approach, (2) give full recognition to behavioral and technical considerations, and (3) use different costs for different purposes. Cost-Benefit Approach: Managers continually face resource-allocation …
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Find a vector function that represents the curve of intersection of the two surfaces. The cylinder x^2+y^2=4 and the surface z=xy Answer: r(t) = 2 sin t, 2 cos t, 2 sin 2t. Explanation Rationalization. We know that one way of the parametrization of a circle of radius r in R^2 centered at the origin …
An oscillator creates periodic waves on a stretched string. a. IF the period of the oscillator doubles, what happens to the wavelength and wave speed? The wavelength doubles but the wave speed is unchanged. The wavelength is halved but the wave speed is unchanged. The wavelength is unchanged but the wave speed doubles. b. If …
If The Period Of The Oscillator Doubles, What Happens To The Wavelength And Wave Speed? Read More »
There is a common misconception that traditional taxonomy is based on morphology, while cladistics is based on genetic data. How is this misconception incorrect? Answer Taxonomy is a branch of science that specializes in classification, especially in the classification of organisms. Cladistics is an approach to the classification of organisms in biology. The method uses …
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Verify that each given function is a solution of the differential equation. ty’−y=t2; y=3t+t2 Answer We have differentiated y(t) Plug the values of y(t) and y'(t) in the given differential equation. y is a solution of a given differential equation.
Calculate the ratio of effusion rates for Ar and Kr. Answer Mar = 39.948 g/mol – Determine the molar mass of argon. Mkr – 83.798 g/mol – Determine the molar mass of krypton. Substitute these molar masses into Graham’s law to determine the ratio of effusion rates.
A rectangular package to be sent by a postal service can have a maximum combined length and girth (perimeter of a cross-section) of 108 inches. Find the dimensions of the package of maximum volume that can be sent. (Assume the cross-section is square.) Answer 108 – 4x*y 108-4x=y There is a max at x = …
What is the preferred steering method to help reduce the possibility of losing control? A. One-hand steering B. Hand-over-Hand Steering C. Push-pull steering D. No hand steering Answer: Push-pull steering is the preferred steering method to help reduce the possibility of losing control. Explanation To assist decrease the likelihood of losing control, the push-pull steering …
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Find dy/dx by implicit differentiation. xe^y = x – y Answer
A boat has a mass of 6800 kg. Its engines generate a drive force of 4100 N, due west, while the wind exerts a force of 800 N, due east, and the water exerts a resistive force of 1200 N due east. What is the magnitude and direction of the boat’s acceleration? Answer a = …
A 5.0 kg dog sits on the floor of an elevator that is accelerating downward at 1.20m/s^2. a. What is the magnitude of the normal force of the elevator floor on the dog? A. 34 N B. 43 N C. 49 N D. 55 N E. 74 N Answer A) B B) D Explanation Given …
Suppose we are testing Ho: p=.20 vs Ha: p>.20 and TS=2.34. What is the p-value? Answer Given (TS = test statistic z) The P-value is the probability of obtaining the value of the test statistic, or a value more extreme when the null hypothesis is true. Determine the P-value using the normal probability table in …
Assume that 30% of students at a university wear contact lenses. a) We randomly pick 100 students. Let p^ represent the proportion of students in this sample who wear contacts. What’s the appropriate model for the distribution of p^? Specify the name of the distribution, the mean, and the standard deviation. Be sure to verify …
Assume That 30 Of Students At A University Wear Contact Lenses Read More »
In What Ways Is Bohr’s Model Of The Atom Similar To And Different From Thomson’s Model? Answer A. Similarity between Bohr’s model and Thomson’s model: Both models show that atoms contain negatively charged particles called electrons. B. The difference between Bohr’s model and Thomson’s model: Bohr’s model shows that the electrons orbit the nucleus, which …
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Which of the following scheduling algorithms could result in starvation? a. First-come, first-served b. Shortest job first c. Round robin d. Priority Answer A) FCFS doesn’t cause starvation. B) SJF could cause starvation. C) RR doesn’t cause starvation. D) Priority could cause starvation. Explanation A) First come first serve does not cause starvation. Every process …
Which Of The Following Scheduling Algorithms Could Result In Starvation? Read More »
Ep-37 what type of boating emergency causes the most fatalities? Answer: Capsizing Explanation Capsizing is the boating emergency that causes the most fatalities because many people drown after capsizing. A boat capsizes when it turns over or is swamped with water. Small boats, such as canoes and sailboats, are most prone to capsize. One of …
Ep-37 What Type Of Boating Emergency Causes The Most Fatalities? Read More »
Find a vector equation and parametric equations for the line segment that joins P to Q. P(0, – 1, 1), Q(1/2, 1/3, 1/4) Answer Vector equation of a line segment joining the points with position vectors R0 and R1 is:
Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified line. Sketch the region, the solid, and a typical disk or washer. y = x3, y = 0, x = 1; about x = 2 Answer When we rotate a thin vertical strip as shown …
