Physics, 01.11.2019 01:31 tjahaheuuwu
The photograph shows an experimental device at sandia national laboratories in new mexico. this device is a mirror that focuses sunlight to heat sodium to a boil, which then heats helium gas in an engine. the engine does the work of driving a generator to produce electricity. the sodium unit and the engine are labeled in the photo. (a) what kind of mirror, concave or convex, is being used? (b) where is the sodium unit located relative to the mirror? express your answer in terms of the focal length of the mirror.
Answers: 1
Physics, 22.06.2019 10:00
Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.
Answers: 1
Physics, 22.06.2019 17:30
Chameleons catch insects with their tongues, which they can rapidly extend to great lengths. in a typical strike, the chameleon's tongue accelerates at a remarkable 220 m/s2 for 20 ms, then travels at constant speed for another 30 ms.
Answers: 1
Physics, 22.06.2019 21:00
Acentrifuge in a medical laboratory rotates at an angular speed of 3,700 rev/min. when switched off, it rotates through 54.0 revolutions before coming to rest. find the constant angular acceleration (in rad/s2) of the centrifuge. your response is within 10% of the correct value. this may be due to roundoff error, or you could have a mistake in your calculation. carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. rad/s2
Answers: 1
Physics, 22.06.2019 21:50
Which of the following is part of the explanation or description of electromagnetic waves? (select all that apply) a. electrically charged molecules in a medium transfer their energy to nearby electrically charged molecules. b. a changing electric field causes a changing magnetic field. c. magnetic molecules in a medium transfer their energy to nearby magnetic molecules. d. a changing magnetic field causes a changing electric field.
Answers: 3
The photograph shows an experimental device at sandia national laboratories in new mexico. this devi...
Mathematics, 25.01.2020 01:31
Mathematics, 25.01.2020 01:31
Mathematics, 25.01.2020 01:31
Mathematics, 25.01.2020 01:31
Mathematics, 25.01.2020 01:31
Mathematics, 25.01.2020 01:31
Mathematics, 25.01.2020 01:31
Mathematics, 25.01.2020 01:31