Physics, 13.07.2021 20:30 gonzalesnik
A top is a toy that is made to spin on its pointed end by pulling on a string wrapped around the body of the top. The string has a length of 71 cm and is wrapped around the top at a place where its radius is 2.4 cm. The thickness of the string is negligible. The top is initially at rest. Someone pulls the free end of the string, thereby unwinding it and giving the top an angular acceleration of 11 rad/s2. What is the final angular velocity of the top when the string is completely unwound
Answers: 3
Physics, 22.06.2019 17:40
A15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25Β°c to 175Β°c. what is the specific heat capacity of iron?
Answers: 1
Physics, 22.06.2019 19:00
The particle p starts from rest at point a at time t = 0 and changes its speed thereafter at a constant rate of 2.8g as it follows the horizontal path shown. determine the magnitude and direction of its total acceleration (a) just before point b, (b) just after point b, and (c) as it passes point c. state your directions relative to the x-axis shown (ccw positive) and choose the angle with the smallest magnitude.
Answers: 1
Physics, 22.06.2019 19:30
Refrigerant-134a flows through a carnot heat pump cycle at 0.5 kg/s. it is known that the maximum absolute temperature in the cycle is 1.1 times the minimum absolute temperature, and the net power input to the cycle is 2.5 kw. if the refrigerant changes from a saturated vapor to a saturated liquid during the heat rejection process, determine the maximum magnitude of the enthalpy of vaporization for this process in kj/kg (with 3 significant figures).
Answers: 3
A top is a toy that is made to spin on its pointed end by pulling on a string wrapped around the bod...
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