Question

In: Physics

four light bulbs arr to be connected in a house. which of the following combinations will...

four light bulbs arr to be connected in a house. which of the following combinations will make the bulb glow highest?
a. all 4 parallel
b. 2 in series and 2 in parallel
c. all 4 in series
d. one in series and 3 in parallel

Solutions

Expert Solution


Related Solutions

When four identical light bulbs are connected in parallel and this combination is connected to an...
When four identical light bulbs are connected in parallel and this combination is connected to an ideal battery, the bulbs each glow with a certain brightness until the battery runs down after six hours. [Recall that an ideal battery is one with no internal resistance.] If two of the light bulbs are removed so that there are just two light bulbs in parallel and then this combination is connected to a new (but otherwise identical) battery, Question 6 options: the...
Three identical light bulbs are connected to a 30V battery in a circuit. Bulb A is...
Three identical light bulbs are connected to a 30V battery in a circuit. Bulb A is on main loop and closest to battery. Bulbs B and C are in parallel and the junction is after Bulb A S1 is in the loop with bulb B and S2 is in loop with bulb C Initially switch 1 is closed and switch 2 is opened. When switch 2 is closed what happens to the brightness of bulbs A,B and C Please explain
The current through two identical light bulbs connected in series is 0.25 A. The total voltage...
The current through two identical light bulbs connected in series is 0.25 A. The total voltage across both bulbs is 120 V. The resistance of a single light bulb is a. 48 ohms. b. 240 ohms. c. 480 ohms.
A company manufactures light bulbs. These light bulbs have a length of life that is normally...
A company manufactures light bulbs. These light bulbs have a length of life that is normally distributed with a known standard deviation of 40 hours. If a sample of 36 light bulbs has an average life of 780 hours, find the 95 percent confidence interval for the population mean of all light bulbs manufactured by this company.
A box contains six 25-watt light bulbs, nine 60-watt light bulbs, and five 100-watt light bulbs....
A box contains six 25-watt light bulbs, nine 60-watt light bulbs, and five 100-watt light bulbs. What is the probability a randomly selected a 60 watt light bulb? (PLease explain how did you get your answer)(2 pt) Note: You must provide your answer as a fraction NOT decimal) Cell Phone Provider Probability AT&T 0.271 Sprint 0.236 T–Mobile 0.111 Verizon 0.263 Does the above table represent the probability model? Explain your answer. (2 pt) The data shows the distance that employees...
Four brands of light bulbs are being considered for use in the final assembly area of...
Four brands of light bulbs are being considered for use in the final assembly area of the Ford F-150 truck plant in Dearborn, Michigan. The director of purchasing asked for samples of 100 from each manufacturer. The numbers of acceptable and unacceptable bulbs from each manufacturer are shown below. At the 0.05 significance level, is there a difference in the quality of the bulbs? (Round your answers to 3 decimal places.) Manufacturer A B C D Unacceptable 19 13 19...
A company that manufactures light bulbs claims that its light bulbs last an average of 1500...
A company that manufactures light bulbs claims that its light bulbs last an average of 1500 hours. A consumer research group wants to test the hypothesis that the mean life of light bulbs manufactured by this company is less than 1500 hours. A sample of 35 light bulbs manufactured by this company gave a mean life of 1450 hours with a standard deviation of 100 hours. The significance level of the hypothesis test is 5% and the distribution for the...
A manufacturer of light bulbs claims that its light bulbs have a mean life of 1520...
A manufacturer of light bulbs claims that its light bulbs have a mean life of 1520 hours. If a random sample of 40 bulbs is tested and has an average life of 1500 hours and the standard deviation is 80 hours, is there sufficient evidence to claim that the mean life is different than the manufacturer's claim? Use alpha = 0.01. Calculate the test statistic. Calculate a confidence interval for the true mean light bulb life. Use the level of...
5. A shipment of 50 light bulbs contains 10 defective light bulbs. In order to test...
5. A shipment of 50 light bulbs contains 10 defective light bulbs. In order to test the quality of the shipment, a quality control engineer selects 5 light bulbs at random. (a) How many different samples are possible? (b) What is the probability the engineer will select exactly two defective light bulbs? (c) The shipment will be rejected if at least one of the light bulbs in the sample is defective. What is the probability the sample will be rejected?...
A manufacturer of light bulbs claims that the average lifetime of one of their bulbs is...
A manufacturer of light bulbs claims that the average lifetime of one of their bulbs is more than 900 hours. A consumer advocacy group wants to test this claim. They obtained a simple random sample of 61 bulbs and timed how long they took to burn out. They obtained a sample mean of 907.5 hours with a standard deviation of 16.5 hours. It’s your job to test the claim at the 5% significance level and determine if the manufacturer is...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT