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A certain lightbulb has a tungsten filament with a resistance of 19.9 O when at 20.0°C and 138 O when hot. Assume the resistivity of tungsten varies linearly with temperature even over the large
Fernando places a 2.0 kg dictionary on a table top, the sits on top of the dictionary. Fernando has a mass of 52 kg. a) What is the normal force exerted by the tale on the dictionary.
The magnitude of impulse on the skier as he leaves the starting gate is?
A 40.0 g mass is attached to a horizontal spring with a spring constant of 5.0 N/m and released from rest with an amplitude of 25 cm. What is the velocity of the mass when it is halfway to the equil
Limestone(CaCO3) is used to remove acidic pollutants from smoke stack flue gases. It is heated to form lime(CaO), which reacts with sulfur dioxide to form calcium sulfite.
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 2.20 × 106 N, one at an angle 14.0 degrees west of north, and the other at an angle 14.0 degrees east of north, as
A tank containing 20 kg of water at 20C fitted with a stirrer that delivers work to the water at the rate of 0.25kW. How long does it take for the temperature of the water to rise to 30 C if no heat
A 0.0500 kg cube of ice at an initial temperature of -15.0 degrees C is placed in 0.600 kg of water at T= 45.0 degrees C in an insulated container of negligible mass. A). Calculate the final tempera
How many liters of hydrogen gas are collected over water at22°C and 725 mmHg when 0.86 g lithium reacts with water?Aqueous lithium hydroxide also forms.
Calculate the charge in electric potential energy of the system as a 3rd charged particle of -3 micro Coulombs is brought from infinitely far away to a position on the y axis at y= 0.5 m.
Two 2 microCoulomb charges are located on the x-axis. One is at x= 1 m and the other is at x= -1 m. a) Determine the electric field on the y axis at y= 0.5 m.
A closed system consists of 4 objects. Initially, object A has 179 J of energy, object B has 186 J of energy, object C has 126 J of energy, and object D has 163 J of energy. After 278 s have passed,
When a pure sample of tert-butyl bromide isanalyzed by gas chromatography, 2 compnents are observed. one isthe tert-butyl bromide, and other is decomposition product.
An immersion-type heating coil is connected to a 120- outlet and immersed in a 200 cup of water initially at 20. The water comes to a boil in 90 .
The energy of an RLC circuit decreases by 1.00% during each oscillation when R=2.00 ohms. If this resistance is removed, the resulting LC circuit oscillates at a frequency of 1.00 kHz. Find the valu
A skier of mass 70 kg is pulled up a slope by a motor driven cable. (a) How much work is required to pull him 60 m up a 30 degree slope (assumed frictionless) at a constant speed of 2.0 m/s? (b) Wha
A 2.1 x 10^3 kg car starts from rest at the top of a 5.0 m long driveway that is inclined at 20 degrees with the horizontal. If an average friction force of 4.0 x 10^3 N impedes the motion, find the
A monatomic ideal gas is compressed adiabatically from a pressure of 1.16 x 105 Pa and volume of 260 L to a volume of 32.0 L. (a) What is the new pressure of the gas? Answer in Pa
Sodium hypochlorite (NaOCl) is the active ingredient in many aqueous commercial bleaching products. If the NaOCl added to aparticular sewage treatment process had a half-life of 15 days.
A 2 μF capacitor is initially uncharged and connected in series with a 6 kΩ resistor. A 16 V battery is then inserted in the circuit and the capacitor begins to charge. How much energy does
A bead of mass m= 5.00 kg is released from point A and slides on a frictionless track. Height at point A is 5.00 m, height at point B is 3.20 m, and height at point C is 2.00 m. Determine (a) the be
What is the total volume of gaseous products, measured at 383°Cand 757 torr, when an automobile engine burns 100. gC8H18 (a typical component of gasoline)?
In industry many productsare designed to be purified by recrystallization from water. What makes water such an attractive recrystallizing solvent, particularly when done on a large scale?
When the temperature of a "copper" penny (It is not really copper) is raised by 100 degrees C, its diameter increases by 0.18%. a). What is the coefficient of linear expansion?