subject
Engineering, 03.12.2020 07:50 yen80

Please, help. A bright object and a screen are 12.5 m apart. What is the position and focal length of a lens that will project an image of the amplified object 24 times onto the screen?

ansver
Answers: 2

Another question on Engineering

question
Engineering, 04.07.2019 18:10
Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2
Answers: 3
question
Engineering, 04.07.2019 18:10
Which one from below is not one of the reasons of planning failures? (clo3) a)-planner is careless. b-planner spend less time in the field but more time on the desk c)-planner is not qualified d)-planner does not have sufficient time to properly plan
Answers: 3
question
Engineering, 04.07.2019 18:20
Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]
Answers: 1
question
Engineering, 04.07.2019 18:20
A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.
Answers: 3
You know the right answer?
Please, help. A bright object and a screen are 12.5 m apart. What is the position and focal length...
Questions
question
Mathematics, 23.10.2020 01:01
question
Mathematics, 23.10.2020 01:01
question
Mathematics, 23.10.2020 01:01
question
Geography, 23.10.2020 01:01
question
Physics, 23.10.2020 01:01
question
History, 23.10.2020 01:01
question
Mathematics, 23.10.2020 01:01
question
Mathematics, 23.10.2020 01:01
question
History, 23.10.2020 01:01
Questions on the website: 13722363