A wave pulse on a string whose end is free is reflected without inversion
Indicate whether the statement is true or false
TRUE
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A 50 m long by 5 m diameter rocket at launch is moving upward at 180 km/h when its sides are at -45ºC and the surrounding air is 25ºC. Estimate the heat transfer from the surrounding air.
What will be an ideal response?
An object has a volume of 4.0 m3 and weighs 40,000 N. What will its apparent weight be in water of density 1000 kg/m3 (apparent weight is the reading of a scale which supports the object)
A) 40,000 N B) 39,200 N C) 9,800 N D) 800 N
Sound in a vacuum is impossible
Indicate whether the statement is true or false
Three particles, each of which has a mass of 80 g, are positioned at the vertices of an equilateral triangle with sides of length 60 cm. The particles are connected by rods of negligible mass. What is the moment of inertia of this rigid body about an axis that is parallel to one side of the triangle and passes through the respective midpoints of the other two sides?
A. 0.018 kg?m2 B. 0.020 kg?m2 C. 0.016 kg?m2 D. 0.022 kg?m2 E. 0.032 kg?m2