What is the quark structure of an electron?
a. uud
b. udd
c. uuu
d. ddd
e. the question does not make sense
E
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Nine bulk silicon carbide specimens of the same size were tested and the following strengths were obtained: 22, 26, 33, 50, 29, 56, 58, 41, and 43 MPa.
(a) Plot these data to evaluate the characteristic strength and the Weibull modulus. (b) What is the stress for a 90 % probability of survival for this material?
A car is traveling at 30.0 m/s when the driver suddenly applies the brakes, giving the car a constant deceleration
The car comes to a stop in a distance of 120.0 m. What was the deceleration of the car? A) 3.75 m/s2 B) 4.00 m/s2 C) 4.25 m/s2 D) 4.50 m/s2 E) 4.75 m/s2
The kinetic energy of a pendulum is greatest
a. when its potential energy is greatest. b. at the top of its swing. c. at the bottom of its swing. d. when its total energy is greatest.
A 5.0-kg object is pulled along a horizontal surface at a constant speed by a 15-N force acting 20° above the horizontal. How much work is done by this force as the object moves 6.0 m?
a. 78 J b. 82 J c. 85 J d. 74 J e. 43 J