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A child complains that her 160 g of milk is too hot at 90 degree C. She then pour 80 g of cold milk at 7 degree C in it. If the specific heat of milk is 3800 J/kg.K, what is the temperature of the mixture?
A 70 pF capacitor and a 280 pF capacitor are both charged to 3.6 kV. They are then disconnected from the voltage source and are connected together, Find the energy lost when the connections are made
What is the smallest quantum of energy that can be absorbed by the molecule in a rotational excitation? What is the smallest quantum of energy that can be absorbed in a vibration excitation? In what regions of electromagnetic spectrum do the transiti..
The drawing shows a person looking at a building on top of which an antenna is mounted. The horizontal distance between the person's eyes and the building is 96.3 m. How tall is the antenna
Two persons on ice skates stand face to face and then push each other away. Their masses are 60kg and90kg. find the ratio of their speeds immediately afterwards. which person has the higher speed?
A transformer on a pole near a factory steps the voltage down from 3600 V (rms) to 120 V (rms). evaluate the current in the secondary
A spherical conducting shell has 12 microcoulombs of positive charge on it. The radii of the shell are r(inner)=12 cm and r(outer)=2r(inner). A particle of -4 microcoulombs is placed at the center of the shell. Provide a sketch of the electric fie..
An explosion breaks an object into two pieces, one of which has 1.5 times the mass of the other. how much kinetic energy did each piece acquire
Find the current in a 9.00 ? resistor connected to a battery that has an internal resistance of 0.30, What is the emf of the battery
an 8.5 m long wire of resistance 20.6 \(\Omega\) carries a current of 6.6, What is the magnitude of the electric field in the wire
Assume that each person is about the similar distance from the center of the field and can generate the same level of sound intensity. How numerous people are at the game.
What is the mass of sculpture (in kg) assume that the local acceleration due to gravity is 9.80 m/s2.
An iron bar of mass, 0.99 kg, slides down a frictionless incline 0.94 m high. What is the speed of the combined masses after collision
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