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Energy Content
You have a kilogram of coal available.
a. How much energy content does it contain in J and kWh?
b. How high could you theoretically lift 1 litre of water with this
energy?
c. To what speed (in km/h) could you theoretically accelerate a car
(mass: 1 t) with this
energy?
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3. You are an insurance investigator called to the scene of a car accident. According to witnesses, a blue car (mass ms) was traveling south through an intersection when it was hit by a red car (mass m.) traveling east that ran a stop sign. You observe that the red car came to rest in the intersection. The blue car ended up a distance from the intersection, in a direction measured south of east. Determine the...
The correct answer is B, please CLEARLY show how to do this and
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Problems 7-8. A thin rod of length a rotates about its center (denoted by A in the figure below) with angular speed o. Attached to each end of the rod are two small spheres, one of mass M, the other of mass 3M 3M Problem 7. What is the magnitude of the translational angular momentum of this system about point A?...
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9. Suppose a particle traverses a path given by r(t) = (+2+1)i+(t sinht)j + (Int)k. Determine the speed of the particle when t = 1. (Recall that sinh t = (et - e-t)/2 is the hyperbolic sine function.]
Show all steps as to how got the answer. How could you give your
supervisor an accurate measurement of what they want to know? And,
what was the initial mass of the compound?
SECTION 1.3: EXERUISES You are in charge of measuring the grams of a compound produced from a slow, on-going chemical reaction. One hour after the reagents have been mixed, you measure 20.3 grams of the compound present. Four hours after that, you measure 57.4 grams. Previous studies...
2. The electric vehicle Tesla Model S has a drag coefficient of 0.24, a mass of 2100 kg, and a frontal area of 2.4 m2. The coefficient of rolling resistance of its tires is 0.01. Recall the density of air at sea level is 1.3 kg/m3. How much kinetic energy is required to overcome rolling resistance and air resistance (drag) at Autobahn speeds of 180 km/hr for a 200 km trip? How much useful energy (in MJ) and money (in...
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Consider a concentric tube heat exchanger with hot and cold water inlet temperatures of 202 and 35°C respectively. The flow rates of the hot and cold fluids are 42 and 84 kg/h, respectively. Assume the overall heat transfer coefficient is 178 W/m2k. cc = 4186 J/kgk, ch = 4302 J/kgK What is the maximum heat transfer rate that could be...
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1. An electron decays from its first excited state to its ground state in a 1-dimensional infinite square well of width 5.0 nm, emitting a photon. Calculate the wavelength of the photon. 2. A water turbine with diameter 40 cm is driven by a flow with constant speed. The turbine is fully immersed in the flow, and the generator driven by the turbine con- verts the energy of the...
please answer 1-5 and show and explain steps clearly, thank you
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1. How many milliliters of 13.2 MH.SO, are needed to prepare 600.0 mL of 0.10 M H SOC? (4.5 mL) 2. 1.60 L of an aqueous solution containing 25.00 g of KCl dissolved in pure water is prepared. What is the molarity of the resulting solution? (0.210 M) 3. A solution containing 292 g of Mg(NO3)2 per liter has a density of 1.108 g/mL. What is the molality...
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used. Thanks!
2. The system shown in the figure below is released from rest and moves 50 cm. Assume all surfaces are frictionless and find the following. a) The tension in the rope A) 3 N B) 2N C) 0.33 N D) 4 N 2N 3.0 kg 0.34 kg å b) The total work (Wtot) done on the 0.34 kg mass. A) -1.49 J B ) 1.49 J C) 1.66 J D...
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(11.6, 11.7) Liquid ammonia (boiling point =-33.4°C) can be used as a refrigerant and heat transfer fluid. How much energy is needed to heat 25.0 g of NH3() from -65.0°C to -12.0°C? 9. 4.7 J/(g K) 2.2 J/(g K) 23.5 kJ/mol 17.0 g/mol Specific heat capacity, NH3() Specific heat capacity,NHs(g) Heat of vaporization Molar mass, M