According to current scientific estimates, when did the Big Bang occur?
A) about 4.5 billion years ago
B) about 20 billion years ago
C) about 65 million years ago
D) about 14 billion years ago
E) about 10 billion years ago
D) about 14 billion years ago
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Far-infrared astronomy must be done from high-flying aircraft because:
A) far-infrared radiation never reaches Earth's surface. B) far-infrared photons are highly energetic. C) far-infrared telescopes have zero diffraction fringe. D) far-infrared sources are very bright.
Energy and Momentum: On a frictionless horizontal surface, a 1.50-kg mass traveling at 3.50 m/s suddenly collides with and sticks to a 3.00-kg mass that is initially at rest, as shown in the figure. This system then runs into an ideal spring of force constant (spring constant) 50.0 N/cm.(a) What will be the maximum compression distance of the spring?(b) How much mechanical energy is lost during this process? During which parts of the process (the collision and compression of the spring) is this energy lost?
What will be an ideal response?
In a two-slit experiment, the slit separation is 3.00 × m. The interference pattern is recorded on a flat screen-like detector that is 2.00 m away from the slits
If the seventh bright fringe on the detector is 10.0 cm away from the central fringe, what is the wavelength of the light passing through the slits? A) 100 nm B) 204 nm C) 214 nm D) 224 nm E) 234 nm
In an inelastic collision, the initial kinetic energy is less than the final kinetic energy
Indicate whether the statement is true or false