subject
Physics, 23.11.2019 03:31 rebecca52360

From earth to the center of our galaxy is about 300,000 light years, meaning that light coming from a star in the center of our galaxy takes 300,000 years to get to earth. answer true false

ansver
Answers: 3

Another question on Physics

question
Physics, 22.06.2019 06:10
Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.
Answers: 3
question
Physics, 22.06.2019 12:50
Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.
Answers: 2
question
Physics, 22.06.2019 19:50
The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.
Answers: 3
question
Physics, 22.06.2019 23:30
Which system of units is used by only a small number of countries in the world, including the u.s.
Answers: 3
You know the right answer?
From earth to the center of our galaxy is about 300,000 light years, meaning that light coming from...
Questions
question
Computers and Technology, 19.02.2021 01:00
question
Mathematics, 19.02.2021 01:00
question
Mathematics, 19.02.2021 01:00
question
Mathematics, 19.02.2021 01:00
question
Arts, 19.02.2021 01:00
question
Mathematics, 19.02.2021 01:00
Questions on the website: 13722363