On of the greatest debates is the intellectual history of mankind was whether the geocentric or heliocentric cosmos was correct. Who was it proposed by?
a) Pyrhagoras
b)thayles
c)Aristarchus
c)Aristarchus
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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?
A ______________ is an ultra-hot collection of electrically charged particles
a. gas b. liquid c. plasma d. solid
Mass on a Spring: In a supermarket, you place a 22.3-N (around 5 lb) bag of oranges on a scale, and the scale starts to oscillate at 2.7 Hz. What is the force constant (spring constant) of the spring of the scale?
A. 650 N/m B. 600 N/m C. 330 N/m D. 820 N/m E. 410 N/m
A 2.0-kg ball moving eastward at 3.0 m/s suddenly collides with and sticks to a 4.0-kg ball moving northward at 2.0 m/s. What is the magnitude of the momentum of this system just after the collision?
A) 10 kg ? m/s B) 6.0 kg ? m/s C) 8.0 kg ? m/s D) 2.0 kg ? m/s E) 14 kg ? m/s