Two crates, each of mass 288 kg, are placed as shown in the bed of a 1448-kg pickup truck. Assume g=9.8 m.s² 1.7 m 2.8 m B 1.8 m 1.2 m 0.75 m 2- Determine the reaction at each of the two front wheels in N.
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- An engineer wants to compare the tensile strengths of steel bars that are produced using a conventional method and an experimental method. (The tensile strength of a metal is a measure of its ability to resist tearing when pulled lengthwise.) To do so, the engineer randomly selectoA child with terrible taste in candy likes to mix his MnMs and Skittles into the same bag. His bag of mixed candy contains: 8 blue MnMs 14 red MnMs 5 yellow MNMS 2 blue Skittles 7 red Skittles 13 yellow Skittles 9 green Skittles Match each of the below outcomes with its probability. Assume the child is randomly selecting candies, and start each calculation with a "fresh" bag as described above. What is the probability that the child will select:A student is concerned with the amount of air pollution students are exposed to in the school's parking lot after school. The student conducts an investigation to compare the quantity of particulate matter released from the diesel-powered buses, natural gas-powered buses, and the large and small cars as they idle waiting to pick up students. To make measurements, a small piece of white fabric is used to collect particulate matter from the tailpipe of each vehicle as it idles for five minutes. Each piece of fabric is then analyzed to measure the amount of particulate matter it collected. (i) Identify the independent variable in the investigation. (j) Identify one variable that was not mentioned in the description that could affect the results of the investigation. (k) Describe a realistic alternate sampling method to collect particulate matter from the vehicles in the investigation. (1) The student wants to ensure that the results are reliable. Explain how the student could modify the…
- A manufacturing company produces electric insulators. You define the variable of interest as the strength of the insulators. If the insulators break when in use, a short circuit is likely. To test the strength of the insulators, you carry out destructive testing to determine how much force is required to break the insulators. You measure force by observing how many pounds are applied to the insulator before it breaks. You collect the force data for 30 insulators selected for the experiment and find out that the mean force is 1670. Based on that, you construct an interval from 1570 to 1770 and claim that this interval can be one of the 95% intervals around the sample means that contain the population mean force. This interval is Check all that apply. a statistic a parameter an interval estimate a point estimate a confidence intervalA 13-year-old, M/N Golden Retriever named Chaska (45 kg) has not been able to bear weight on his rear limbs for the past 2½ days. The owner was given both surgical and medical options, but because of the dog’s age, the owner opted for medical treatment. This dog was put on carprofen 1 mg/lb BID. Before treatment was started, a blood sample was collectedto assess liver enzymes. Carprofen comes in 25 mg, 75 mg, and 100 mg tablets. Calculate the amount of medication needed for 14 days of treatment.a. How many tablets do you dispense to this owner?Industrial experiment Engineers at a computer produc-tion plant tested two methods for accuracy in drilling holes into a PC board. They tested how fast they couldset the drilling machine by running 10 boards at each oftwo different speeds. To assess the results, they measuredthe distance (in inches) from the center of a target on theboard to the center of the hole. The data and summarystatistics are shown in the table: Write a report summarizing the findings of the experi-ment. Include appropriate visual and verbal displays of the distributions, and make a recommendation to theengineers if they are most interested in the accuracy ofthe method.
- A 88.3 g piece of copper (specific heat 0.380 J/g.°C) is heated and then placed into 400.0 g of water initially at 20.7°C. The water increases in temperature to 22.2°C. What is the initial temperature (in °C) of the copper? (The specific heat of water is 4.184 J/g °C).A manufacturing company produces electric insulators. You define the variable of interest as the strength of the insulators. If the insulators break when in use, a short circuit is likely. To test the strength of the insulators, you carry out destructive testing to determine how much force is required to break the insulators. You measure force by observing how many pounds are applied to the insulator before it breaks. The accompanying data represent the amount of force required to break a sample of 30 insulators. 1,865 1,706 1,698 1,619 1,609 1,779 1,570 1,693 1,581 1,668 1,898 1,755 1,729 1,698 1,704 1,780 1,883 1,771 1,799 1,867 1,812 1,713 1,754 1,793 1,823 1,791 1,668 1,815 1,677 1,707 Construct a 90% confidence interval for the population mean force. ___ ≤μ≤ ___A manufacturing company produces electric insulators. You define the variable of interest as the strength of the insulators. If the insulators break when in use, a short circuit is likely. To test the strength of the insulators, you carry out destructive testing to determine how much force is required to break the insulators. You measure force by observing how many pounds are applied to the insulator before it breaks. The accompanying data represent the amount of force required to break a sample of 30 insulators. Complete parts (a) through (c) below. Click the icon to view the data. a. Construct a 95% confidence interval for the population mean force. ο sus Π (Round to the nearest integer as needed.)
- A manufacturing company produces electric insulators. You define the variable of interest as the strength of the insulators. If the insulators break when in use, a short circuit is likely. To test the strength of the insulators, you carry out destructive testing to determine how much force is required to break the insulators. You measure force by observing how many pounds are applied to the insulator before it breaks. The accompanying data represent the amount of force required to break a sample of 30 insulators. a. Construct a 99% confidence interval for the population mean force.Three different corrosion-resistant coatings are being considered for use on iron pipes. Ten pieces of pipe are marked off in six equal segments. For each pipe, two segments received coating A, two received coating B, and the remaining two received coating C. The pipes were placed in a corrosive environment for a period of time; then the depth of the deepest pit (in mm) caused by corrosion was measured for each segment on each pipe. The effect of interest is the coating; the pipe is a blocking factor, and there were two replications on each pipe. The following sums of squares were calculated: sum of squares for blocks = 11.2, sum of squares for treatments = 4.8, sum of squares for interactions = 18.4, total sum of squares = 44.7. a) Construct an ANOVA table. You may give ranges for the P-values. b) Are the assumptions for a randomized complete block design satisfied? Explain. c) Does the ANOVA table provide evidence that mean pit depth differs among coatings? Explain.In 13.9 s, 278 bullets strike and embed themselves in a wall. The bullets strike the wall perpendicularly. Each bullet has a mass of 5 x 10-3 kg and a speed of 977 m/s. (a) What is the average change in momentum per second for the bullets? (b) Determine the average force exerted on the wall. (c) Assuming the bullets are spread out over an area of 3.17 x 104 m² obtain the average pressure they exert on this region of the wall. (a) Number i (b) Number i (c) Number i Units Units Units