Which of following statements about the image formed by a single concave lens are true? (There could be more than one correct choice.)
A) The image is always real.
B) The image is always virtual.
C) The image is always inverted.
D) The image is always upright.
E) The image is always smaller than the object.
B, D
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An empty train car of mass 2.0 x 104 kg coasts along at 10 m/s. A 3000-kg boulder is suddenly dropped vertically into the car. Find the speed of the car immediately after the boulder is dropped in
What will be an ideal response?
Igneous definition
What will be an ideal response?
Thermal Expansion: By what length will a slab of concrete that is originally 18 m long contract when the temperature drops from 24°C to -16°C? The coefficient of linear thermal expansion for this concrete is 1.0 × 10-5 K-1.
A. 0.50 cm B. 0.72 cm C. 1.2 cm D. 1.5 cm
In a particular case of Compton scattering, a photon collides with a free electron and scatters backwards. The wavelength after the collision is exactly double the wavelength before the collision. What is the wavelength of the incident photon?
A) 3.6 × 10-12 m B) 4.8 × 10-12 m C) 2.4 × 10-12 m D) 1.2 × 10-12 m E) 6.0 × 10-12 m