The alpha particle has twice the electric charge of the beta particle but deflects less than the beta in a magnetic field because it
A) moves much slower.
B) moves much faster.
C) has much more inertia.
D) has much less inertia.
Answer: C
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Which of the following best describes the purpose of WAI guidelines?
A. To define a web-safe color palette. B. To centralize the domain name registration process. C. To ensure accessibility of webpage content. D. To encourage mobile-first web design strategy.
Astronomers have found evidence that the expansion of the Universe is accelerating. Such acceleration
A. is deduced because distant galaxies are receding more slowly than expected from the Hubble law. B. is deduced because distant galaxies are receding faster than expected from the Hubble law. C. is deduced because nearby galaxies are receding faster than expected from the Hubble law. D. was predicted by the Big Bang model in cosmology.
1.76m tall man looks at his reflection in a plane mirror. He stands 4.2m away from the window. How far from his eyes are the images of his feet? Assume his eyes are 5cm below the top of his head.
A. 8.4m B. 11.1m C. 4.2m D. 4.53m
Free Fall: A toy rocket is launched vertically from ground level at time t = 0.00 s. The rocket engine provides constant upward acceleration during the burn phase. At the instant of engine burnout, the rocket has risen to 64 m and acquired an upward velocity of 60 m/s. The rocket continues to rise with insignificant air resistance in unpowered flight, reaches maximum height, and falls back to the ground. The time interval during which the rocket engine provided the upward acceleration, is closest to
A. 2.1 s. B. 2.3 s. C. 1.9 s. D. 1.7 s. E. 1.5 s.