College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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How does driving a car on a daily basis affect the environment? What other modes of transportation exist to try to lessen this effect?
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- Your home electricity bill for this 30-day month is $84. The rate is 15 cents per kilowatt-hour. How many Joules of energy did you consume during the month? a) 3.6 million b) 60,000 c) 1 d) 60 e) none of thesearrow_forwardA block having a mass of m = 19.5 kg is suspended via two cables as shown in the figure. The angles shown in the figure are as follows: α = 15° and β = 28°. Solve for the numeric value of T1 in newtons. Solve for the numeric value of T2 in newtonsarrow_forward6. Which of the following statements is true? a. Indirect action can be modified by protectors or sensitizers. b. Direct action can be modified by protectors or sensitizers.arrow_forward
- As you learned in this course, there are many different energy transformations to accomplish the same tasks. The screen on your phone is actually an energy transformation technology. It converts electrical energy to radiant energy ight) There are many technologies which can be used to produce a screen, and their efficiency is linked in a complex manner to the colours in the image they display D Here is a simplified example: Power consumption Usable light output power Organic light emitting diode (OLED) 2.0 W 0.38 W Liquid crystal display (LCD) 3.0 W 0.25 Warrow_forward9. In the figure, R₁ = 3 kn = R₂. If the power dissipated in R₁ and R2 are 90 mW and 10 mW, respectively, how much power is dissipated in R3? (1) 45 mW (2) 10 mW 3) 30 mW 4) 90 mW 20 mW R₁ E www R₂ R3arrow_forwardRead through the different scenarios below and choose what kind of energy transfer is happening for each one. Note: each answer will be used 1 time.arrow_forward
- For a romantic dinner a couple took a small airplane for a quick flight to the countryside and then returned home the plane flew a total of five hours and each way the trip was 300 miles the plane was flying with the wind and then against the wind if the plane was flying at 125 mph what was the speed of the wind that affected the planearrow_forwardA standard elevator in a midrise building can hold a maximum weight of about 1.5 tons. Assuming an average adult weighs 150 pounds, how many adults could safely ride this elevator? (1 ton = 2000 lb)arrow_forwardGeothermal energy uses the subsurface level of the earth to heat up water converting it to steam and then using the steam to turn a turbine attached to a generator to generate electric energy. If the geothermal energy conversion process is 46% efficient and there was 789 J of electricity produced, how much energy did the steam have before reaching the turbine? answer 1715 eff=output/inputx 100arrow_forward
- What are two ways a force can be balancedarrow_forwardA 279 kg boulder is pulled with a rope across a field by a strong man. If the man uses a force of 2,439 N to cause the boulder to accelerate across the field. The coefficient of friction is 0.69. How fast does the strong man accelerate the boulder?arrow_forwardA tractor is speeding up at 2 m/s/s while pulling a 1,828 kg sled with a rope at an angle of 25 degrees. The coefficient of kinetic friction between the sled and ground is 0.4. What is the tension (Newtons) in the rope? (g=9.8 m/s2 )arrow_forward
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