A platinum wire is used to determine the melting point of indium. The resistance of the platinum wire is 2.000 ? at 20°C and increases to 3.072 ? as indium starts to melt
What is the melting point of indium? (The temperature coefficient of resistivity for platinum is 3.9 × 10-3/C°.) A) 117°C
B) 137°C
C) 157°C
D) 235°C
E) 351°C
C
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a. 1.2 b. 2.9 c. 63.1 d. 800 e. 6.2 x 10^5
A truck is carrying a 120-kg refrigerator, which is 2.20 m tall and 85.0 cm wide has its center of mass at its geometrical center. The refrigerator is facing sideways and a short strip on the bed of the truck keeps the refrigerator from sliding
What is the maximum acceleration that the truck can have before the refrigerator begins to tip over? A) 1.90 m/s2 B) 4.17 m/s2 C) 3.79 m/s2 D) 7.58 m/s2 E) 8.34 m/s2
If a rocket initially at rest accelerates at a rate of 50 m/s2 for one minute, its speed will be
A) 50 m/s. B) 500 m/s. C) 3000 m/s. D) 3600 m/s.
Kirchhoff's voltage rule is an example of conservation of energy
Indicate whether the statement is true or false