A 100-m long transmission cable is suspended between two towers. If the mass density is 2.01 kg/m and the tension in the cable is 3.00 × 10^4 N, what is the speed of transverse waves on the cable?
a. 60 m/s
b. 122 m/s
c. 244 m/s
d. 310 m/s
e. 1 500 m/s
B
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A stone is thrown horizontally from the top of a tower at the same instant that a ball is dropped vertically. Which object is traveling faster when it hits the level ground below?
A) Neither, since both are traveling at the same speed. B) It is impossible to tell from the information given. C) the ball D) the stone
Brown dwarfs are ____
a. stars with a very thick dust sphere around them, so they appear "brown" b. low mass M type stars with hundreds of planets c. an anomaly because they are extremely small but have relatively high temperature d. protostars that could not ignite the fusion of hydrogen at their core e. has a surface temperature of 2500 K by fusing hydrogen
Type Ia and Type Ib supernovae both involve binary star systems
a. True b. False Indicate whether the statement is true or false
When comparing product nuclei to reactant nuclei in an exothermal nuclear fusion process, which has the greater binding energy per nucleon?
a. greater in product nuclei b. greater in reactant nuclei c. equal in both product and reactant nuclei d. None of the above choices are valid.