You discover that a nearby star, very similar to the Sun, has a velocity curve that has a period of 6 months, induced by the orbit of a planet. You infer that
A) the planet's orbit radius is greater than 1 AU.
B) the planet's orbit radius is less than 1 AU.
C) the planet's orbit radius cannot be determined based on the information provided.
D) the planet's orbit radius is about 1 AU.
B
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For germanium at a tensile stress of 410 MPa and a temperature of 332°C, what is the primary creep mechanism? The shear modulus of germanium is 41 GPa.
What will be an ideal response?
In the two-slit experiment, for the condition of bright fringes, the value of m = +4 corresponds to a path difference of
A) 4? B) 3? C) 2? D) ? E) (1/2)?
A 50-kg air conditioner is placed on top of a concrete pad that is 20 cm thick and has a cross-sectional area of 3.0 m2. What is the change in thickness of the pad caused by the air conditioner? Young's modulus for concrete is 2.3 × 1010 N/m2
A) 1.4 × 10-9 m B) 2.8 × 10-9 m C) 1.4 × 10-8 m D) 1.4 × 10-7 m E) 2.8 × 10-8 m
A 2.0-kg object moving 3.0 m/s strikes a 1.0-kg object initially at rest. Immediately after the collision, the 2.0-kg object has a velocity of 1.5 m/s directed 30° from its initial direction of motion. What is the x component of the velocity of the 1.0-kg object just after the collision?
a. 3.7 m/s b. 3.4 m/s c. 1.5 m/s d. 2.4 m/s e. 4.1 m/s