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Solve the given problems:
Problem 1: The number of kilocalories in food is determined by calorimetric techniques in which the food is burned and the amount of heat transfer is measured. How many kilocalories per gram are there in a 3.41-g brazil nut if the energy from burning it is transferred to 0.420 kg of water held in a 0.110-kg aluminum cup, causing a 53.7 ºC temperature increase? Units are in kcal/g.
Problem 2: If a serving of Brazil nut consists of 14 g, how many kcal is consumed per serving? (Note: food packaging energy content is labeled as "cal" which is equivalent to "kcal".) Units are in kcal
Show all work, use additional paper if necessary.
three blocks are located on a horizontal frictionless table. they are connected by a massless cord as shown in the
What is the highest possible temperature of the spoon when you finally take it out of the cup?
At the instant shown, the spring is unstretched and B is moving downward at 4 ft/s. Use conservation of energy to identify velocity of B when it has moved downward 2 ft from its current position.
A spherical water drop 2.9 ?m in diameter is suspended in calm air due to a downward-directed atmospheric electric field of magnitude E = 5240 N/C. How many excess electrons does it have
A bat (see the image below) can detect very small objects, such as an insect whose length is approximately equal to one wavelength of the sound the bat makes. what is the smallest insect the bat can detect
Planet Z is 1.00×104km in diameter. The free-fall acceleration on Planet Z is 10.0m/s2. What is the mass of Planet Z
An 800-N man stands halfway up a 5 m long ladder of negligible weight. The base of the ladder is 3 m from the wall as shown. suppose that the wall-ladder contact is frictionless, wall pushes against the ladder with a force of what magnitude.
An engine delivers 40.0 J of work while it takes in energy from a 400 K thermal source. find the least amount of heat needed to run the engine
A 19.6 kilogram block is dragged over a rough, horizontal surface by a constant force of 75.7 Newton acting at an angle of 27.1o above the horizontal. Determine the magnitude of the work done by force of friction
A picture hangs on a nail, the tension T in each string segment is 3.5N, what is the weight of the picture
Blue interference fringes are formed on a screen 2.1 m away from a double slit illuminated by monochromatic light of wavelength 516 nm. The distance among the centers of adjacent fringes is 3.8 mm. Discover the separation among the two slits.
A system consisting entirely of electrons and protons has a net charge of 1.71×10?15 C and a net mass of 4.76×10?23 kg. how many protons are in this system
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