Final equilibrium temperature
A 0.380 kg iron horseshoe that is initially at 580°C is dropped into a bucket containing 21.8 kg of water at 21.0°C. What is the final equilibrium temperature (in °C)? Neglect any heat transfer to or from the surroundings. Do not enter units.
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A string of mass density 0.0040 kg/m is under tension of 360N and is fixed at both ends. One of its resonance frequencies is 375 Hz. the next higher resonance frequency is 450 Hz. What is the fundamental resonance frequency?
A crate is pulled to the right with a force of 82 N, to the left with a force of 115 N, upward with a force of 565 N and downward with a force of 236 N. What is the magnitude and the direction of the net force on the crate?
A plane mirror is placed on the level bottom of a swimming pool that holds water (n = 1.33) to a depth of 2.5 m. A small toy is suspended 1.9 m above the mirror. An observer above the water looks vertically downward at the toy and its image in the
What are the critiques of the uncertainty reduction theory? What are the strengths and weaknesses? How might researchers expand and further develop the theory?
A 0.380 kg iron horseshoe that is initially at 580°C is dropped into a bucket containing 21.8 kg of water at 21.0°C. What is the final equilibrium temperature (in °C)? Neglect any heat transfer to or from the surroundings. Do not enter
The mass of a water molecule is 2.99 10-26 kg. If the mass of a person is 63 kg, estimate the number of water molecules in that person.
A block of iron has the dimensions of 3.00 cm x 3.00 cm x 3.00 cm. It has a mass of 213 g. When placed in water, the block sinks. What volume of water did it displace?
What are the transitions that of the Roman and Architectural art?
In a popular amusement park ride, a rotating cylinder of radius 3.5 m is set in rotation at an angular speed of 5.28 rad/s, as shown. The floor then drops away, leaving the riders suspended against the wall in a vertical position. What minimum co
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