A 2525 kg truck can be held up by a piston of radius 15 cm through a hydraulic lift by a force of 175 N on a piston of what radius?
A. 3.9 cm
B. 1.04 cm
C. 1.06 cm
D. 1.26 cm
D. 1.26 cm
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Velocity Addition: A tracking station on Earth observes a rocket move away at 0.370c. This rocket is designed to launch a projectile at 0.505c relative to the rocket. What speed (in terms of the speed of light) does the tracking station measure for the projectile if it is fired (a) straight ahead of the rocket or (b) backward from the rocket?
What will be an ideal response?
The large space telescope that has been placed into an Earth orbit has an aperture diameter of 2.40 meters. What angular resolution will this telescope achieve for visible light of wavelength ? = 4.80 × 10^?7 m?
a. 2.44 × 10^?7 rads b. 2.44 × 10^?4 rads c. 2.44 × 10^?3 rads d. 1.22 × 10^?6 rads e. 2.00 × 10^?6 rads
When a light wave enters into a medium of different refractive index,
A) its speed, frequency, and wavelength change. B) only its speed and frequency change. C) only its speed and wavelength change. D) only its frequency and wavelength change.
Two clean, glass plates spaced 0.2 mm apart are placed in 20°C water. How far up the plates will the water climb if the contact angle is 0°?
(A) 75 mm (B) 70 mm (C) 65 mm (D) 60 mm