subject
Physics, 21.09.2019 04:30 lilzaya510

Starting from rest, an elevator accelerates uniformly between the 1st and 2nd floors, and decelerates uniformly between the 5th and 6th floors, coming to a stop at the 6th floor. in between, the elevator covers the 6 meter distance between two adjacent floors in 1 s. inside, liz (who is about to graduate), is standing on a scale that reads 800 n when the elevator isn't moving. what was her minimum scale reading during the trip? (use g = 10 m/s2)

ansver
Answers: 2

Another question on Physics

question
Physics, 23.06.2019 00:40
Asteel tube (k=50 w/mk) of inner and outer diameter di = 20mm and do=26mm, respectively, is used to transfer heat from hot gases flowing over the tube (h-hot = 200w/m2k) to cold water flowing through the tube (h-cold = 8000 w/m2k). what is the cold-side overall heat transfer coefficient uc? to enhance heat transfer 16 straight fins of rectangular profile are installed longitudinally along the outer surface of the tube. the fins are equally spaced around the circumference of the tube, each having a thickness of 2mm and a length of 15mm. what is the corresponding overall heat transfer coefficient uc? *solve for uc in both cases*
Answers: 1
question
Physics, 23.06.2019 03:00
Use the library or internet to research each planet. make a chart comparing the following: approximate surface temperature relative surface gravity compared to earth atmospheric gases water in any form: solid, gas, or liquid when you have completed your chart, use the information you have collected to answer the following questions: which is the hottest planet? which is the coldest planet? which planet's temperature is closest to that of earth? (note: water boils at 100°c/212°f. water freezes at 0°c/32°f) which planet has the greatest gravitational attraction? which planet has the least gravitational attraction? which planet's gravitational pull is closest to that of earth? do any of the planets have oxygen in their atmosphere? which planet's atmosphere most resembles that of earth? do any of the planets have flowing water? which planet's water resources (solid, gas, or liquid) might be close to the amount on earth? which planet most resembles earth in terms of all of the factors: temperature, gravity, atmosphere, and water? if earth became an uninhabitable planet, which planet do you think would be the next best to live on? explain your answer.
Answers: 2
question
Physics, 23.06.2019 12:00
Aforce of 500.0 is represented graphically with its tail at the origin and the tip ointed in a direction 30.0° above the positive x-axis. what are the x- and y- components of the vector?
Answers: 3
question
Physics, 23.06.2019 12:20
The lid of a pressure cooker forms a nearly airtight seal. steam builds up pressure and increases temperature within the pressure cooker so that food cooks faster than it does in an ordinary pot. the system is defined as the pressure cooker and the water and steam within it. if 2.0 g of water is sealed in a pressure cooker and then vaporized by heating, and 5655 j must be added as heat to completely vaporize the water, what is the change in the system’s internal energy? answer in units of j.
Answers: 3
You know the right answer?
Starting from rest, an elevator accelerates uniformly between the 1st and 2nd floors, and decelerate...
Questions
question
Mathematics, 16.07.2019 00:50
question
English, 16.07.2019 00:50