Question 4 How much power is required to lift a heavy solid concrete beam with mass 119.69 kg upward with a constant speed of 8.95 m/s using a crane? watts Input only the number. Round off to the nearest whole number. A Moving to the next question prevents changes to this answer. 30°C acen 3ms FHD 44Hz FIL FI2 F7 FB F9 F1O Ser Lk F4 FS F6 Pause F3 F2 CD- Esc

Question 4 How much power is required to lift a heavy solid concrete beam with mass 119.69 kg upward with a constant speed of 8.95 m/s using a crane? watts Input only the number. Round off to the nearest whole number. A Moving to the next question prevents changes to this answer. 30°C acen 3ms FHD 44Hz FIL FI2 F7 FB F9 F1O Ser Lk F4 FS F6 Pause F3 F2 CD- Esc

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question 5 15 pts Calculate the number of kilowatt-hours (kW-hrs) consumed in twelve weeks by five 36-Watt pond pumps that are used for 3 hours each week. O 45.36 kW-hrs O 9.072 kW-hrs O 6.48 kW-hrs O 1.296 kW-hrs
A typical avocado has 180 Calories. If all this energy could be used to lift a bucket of water weighing 40 N, through what vertical distance could the bucket be lifted? (1 calorie = 4.184 J and 1 Calorie = 103 calories) a. 1.72E+6 m b. 3.01E+7 m c. 7.53E+5 m d. 1.88E+4 m
A blender does 5000 J of work on the food in its bowl. During the time the blender runs, 2000 J of heat is transferred from the warm food to the cooler environment. What is the change in the thermal energy of the food?A. +2000 J B. +3000 JC. +7000 J D. -2000 JE. -3000 J
1. A roller-coaster car with a mass of 1200 kg starts at rest from a point 20 m above the ground. At point B, it is 9 m above the ground. [Express your answers in kilojoules (kJ).] a. What is the initial potential energy of the car? b. What is the potential energy at point B? c. If the initial kinetic energy was zero and the work done against friction between the starting point and point B is 40 000 J (40 kJ), what is the kinetic energy of the car at point B 2. The time required for one complete cycle of a mass oscillating at the end of a spring is 0.80 s. What is the frequency of oscillation?
For locations that have no electric service, companies are designing bicycle-powered generators that are nearly 100% efficient that can be used to charge cell phones or power lights. If you are the person chosen to pedal and your friends need a total of 150 W of electric power, how much metabolic powerwill you use as you pedal?A. 150 W B. 300 W C. 450 W D. 600 W
In a spark ignition engine, spark ignites a fuel-air mixture inside the cylinder viacompression. The combustion of the mixture causes gas expansion, which thenpushes the piston upward. This expansion process is referred to as the power stroke.What are the signs of the work and internal energy change of the gas at the powerstroke?a. + W, +∆Ub. + W, −∆U c. −W, −∆Ud. −W, +∆U