Physics, 09.12.2019 07:31 enrique3300
Which statements explain current theories about dark energy and dark matter? check all that apply.
(correct) space that appears empty actually contains dark energy and dark matter.
(correct) dark matter does not emit electromagnetic radiation.
scientists believe dark energy will cause the universe to collapse inward to a single point.
(correct) scientists theorize that dark energy is causing the expansion of the universe to accelerate.
dark matter includes all of the dust, ice, and debris that scientists observe in black holes.
just trynna out future students
Answers: 1
Physics, 21.06.2019 19:10
Athin, square metal plate measures 14 cm on each side and has emissivity of 0.60. the plate is heated to a temperature of 745°c. what is the rate at which the plate radiates energy ? the stefan-boltzmann constant is 5.67 × 10-8 w/(m2 ? k4). remember that the plate will radiate energy from both its top and bottom surfaces.
Answers: 1
Physics, 22.06.2019 01:10
The x-coordinate of a particle in curvilinear motion is given by x = 3.1t3 - 4.9t where x is in feet and t is in seconds. the y-component of acceleration in feet per second squared is given by ay = 2.3t. if the particle has y-components y = 0 and vy = 5.0 ft/sec when t = 0, find the magnitudes of the velocity v and acceleration a when t = 1.8 sec. sketch the path for the first 1.8 seconds of motion, and show the velocity and acceleration vectors for t = 1.8 sec. answers: v = ft/sec a = ft/sec2
Answers: 2
Physics, 22.06.2019 02:30
The act of moving from one place to another. a. locomotor b. aerobic c. stationary d. static
Answers: 3
Which statements explain current theories about dark energy and dark matter? check all that apply.<...
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