Physics question and answers for February 29, 2024
- Q Life is good for only two things discove 9 The corpse of a famous math midnight in his mansion The Newton s Law of Cooling to d temperature was 98...
- Q Two containers of the same substance have masses and temperatures as shown Which box has the larger thermal energy A Box A B Box B C They are the same...
- Q A picture window has dimensions of 1.77 m by 2.68 m and is made of glass 5.14 mm thick. On a winter day, the outside temperature is -20C, while the...
- Q A 43-cm long cylindrical rod conducts 175 J/s from a furnace at 325C to a container of boiling water under 1 atmosphere.Compute its diameter if it is made of steel...
- Q A tungsten sphere (r = 1.41 cm) is needed to be maintained at 3314 K. The walls of the enclosure, where it is suspendedwithin, are at 251 K. Ignoring the...
- Q A tungsten sphere (r = 1.08 cm) is needed to be maintained at 3249 K. The walls of the enclosure, where it is suspended within, are at 260 K. Ignoring...
- Q Two 99 sq cm plates which are both 2.21 mm thick are soldered together. Plate A is at 155C while plate B is at 0C. Considering the following thermal conductivities,...
- Q Two rooms, each a cube 4 m per side, share a 10.9-cm thick brick wall. Because of a number of 100-W lightbulbs in one room, the air is at 24...
- Q One end of an insulated metal rod is maintained at 100 deg C, and the other end is maintained at 0 deg C by an ice-water mixture. The rod is...
- Q A 34-cm long cylindrical rod conducts 188 J/s from a furnace at 344C to a container of boiling water under 1 atmosphere. Compute its diameter if it is made of...
- Q If left untreated, which of these is the most likely outcome of a binge-eatingdisorder?O A.ObesityO B.Anorexia nervosaO C.Excessive muscle massO D.Tooth decay
- Q Two rooms, each a cube 4 m per side, share a 13.9-cm thick brick wall. Because of a number of100-W lightbulbs in one room, the air is at 20 deg...
- Q A picture window has dimensions of 1.3 m by 2.28 m and is made of glass 5.62 mm thick. On a winter day, the outside temperature is -20C, while the...
- Q 13. The mass of an object is 229 g- The object requires 20.0J to raise its temperature by 10.0 C. What is the specific heat of the object?4,580,000 J/kg. K2000...
- Q A sphere has radius 0.30 m, surface emissivity 0.48, and temperature 600 K. Surrounding the sphere is a concentric spherical shell. The inner surface of the shell has radius 0.90...
- Q A gas at 100 C fills volume Vo.Part AIf the pressure is held constant, by what factor does the volume change if the Celsius temperature is doubled?? Part BIf the...
- Q A X means your answer is close but wrong (do not round off at all unless stated).Specific Heat:(a) How much heat must be removed from a 264 g block of...
- Q The specific heat c of a solid at low shows temperature dependence according to the relation c = DT3 where D is a constant and I is the temperature in...
- Q In a container of negligible mass 140g of ice initially at -15C is added to 200g of water that has a temperature of 40C. If no heat is lost to...
- Q A change in the free energy of a systemat constant temperature and pressurewill be:At constant temperature and pressureAsys G < 0(spontaneous)Asys G = 0(equilibrium)Asys G> 0(non - spontaneous)The free energy...
- Q 5 g of water at 30C and 5 g of ice at -20C are mixed together in a calorimeter. Find the final temperature of the mixture. Assume water equivalent of...
- Q A substance registers a temperature change from 20.5 C to 40.2 C. To what incrementaltemperature change does this correspond? HINT: Change each to Kelvin first then find thetemperature change. (K...
- Q Four ice cubes are dropped in a soda at 15C and mass of soda is 0.30 kg. The ice is at 0C and each cube has a mass of 5.0...
- Q Find the net rate of heat loss by radiation from a skier standing in the shade, given the following. She is completely clothed in white (head to foot, including a...
- Q The ice maker inside a refrigerator makes ice cubes at 0.0C from water that is at 13.7C when it first enters the ice maker. If this machine is rated at...
- Q Question 9 Points 2Complete the equation: 2 Cu (s) + O? (g) ?___(s).Cu?OCuOCUO?Cu?O2
- Q Heat capacity is defined as: the transfer of energy across the boundary of a system due to a temperature difference between the system and its surroundings. the heat capacity per...
- Q Students design an experiment with a curved, insulated rod of an unknown thermally conducting material, as shown in the figure. The rod is 1m long and 2 cm in diameter....
- Q 1) 150 g of a liquid at 45C is filled in an insulated metal container at 35C whose mass is 110 g. The system eventually reaches an equilibrium. Find: (a)...
- Q The temperature in Paris, France, one summer day is 27.7C. Meanwhile, the temperature in Paris, TN, is 87.1F.Answer the three parts below, using three sig figs.Part A - What is...
- Q An object with initial temperature 150C is placed outside, where the temperature is 35C. Its temperatures at 12:15 and 12:20 are 120C and 90C, respectively.(a) At what time was the...
- Q As the molecules of a substance gain heat energy, which of the following occurs?A. they increase in size due to the added energyB. they have more kinetic energy because they...
- Q A small hole of radius 1 cm is made in a blackened spherical shell of radius 2m. Inside the shell we have another concentric blackened sphere of radius 1m. The...
- Q Compare the rate of radiation by a blackbody at 727 C with that at 427 C. Also compare its rate of loss of heat at the two temperatures, if the...
- Q An unknown substance at 94.5C with a mass of 55 g is added to 134 g of water at 22C. The final equilibrium temperature is 26.6C. What is the specific...
- Q Lake Erie contains roughly 4.00 x 1011 m of water.(a) How much energy is required to raise the temperature of that volume of water from 15.8C to 20.2C? (Assume the...
- Q Conduction, Convection, or Radiation? Which type (or types) of heat transfer is demonstrated by the following example? the metal slide at the playground becomes too hot to slide down (hint:...
- Q Conduction, Convection, or Radiation? Which type of heat transfer is demonstrated by the following example? macaroni rises and falls as it cooks in a pot of water radiation convection conduction...
- Q 3. A chemist mixes 500 g of lead at 500C with 1,200 g of water at 20C. She then mixes 500 g of copper at 500C with 1,200 g of...
- Q In class we discussed how a heat pump works (either with just a gas or with a 'refrigerant'). Describe in a paragraph (with a diagram if you'd like) how a...
- Q Suppose a woman does 500 J of work and 9500 J of heat transfer occurs into the environment in the process. (a) What is the decrease in her internal energy,...
- Q A 0.250-kg block of a pure material is heated from 20C to 65C by the addition of 4.35 kJ of energy. Calculate its specific heat and identify the substance of...
- Q An ice chest at a beach party contains 48 cans of soda at 9 C. Each can of soda has a mass of 0.35 kg and a specific heat capacity...
- Q 66 If the pressure of a gas is doubled at constant temperature then the mean square velocity will become 1 No change 3 Four times 2 double 4 None of...
- Q Illustrations 13 Molar Heat capacity of a Gas in Tuna Process Molar Heat Capacity of a Gas in Tuna Process One mole of an ideal gas having adiabatic exponent y...
- Q i A body cools from a temperature 3T to 2T in 10 minutes The room temperature is T Assume that Newton s law of cooling is applicable The temperature of...
- Q To what temperature should the hydrogen at room temperature 27 C be heated at constant pressure so that the R M S velocity of its molecules becomes double of its...
- Q Physics Question No 45 I II 8cm 8cm Question Palette In figure l an air column of length is entrapped by a column of Hg of length 8 cm In...
- Q We have a sample of gas characterised by P V and T and another sample of gas characterised by 2P V 4 and 2T What is the ratio of the...
- Q The average speed of 0 1 mol of gas A at 300 K was 460 m s The average speed of 0 2 mol of another gas B at 400...
- Q A solid sphere made of material of bulk modulus 2 x 10 N m is surrounded by a liquid in a cylindrical container A massless piston of area 1m floats...
- Q An ideal gas is held in a non insulated rigid container with a volume of 20 L More gas is pumped into the container but the volume of the container...
- Q Four identical pendulums are made by made by attaching a small ball of mass 100 g on a 20 cm long thread and suspended from the same point Now each...
- Q Example 5 9 What is the acceleration of the block and trolley system shown in a Fig 5 12 a if the coefficient of kinetic friction between the trolley and...
- Q 10 mol of an ideal gas y 1 5 behave as working substance in an engine working in a cycle as shown below 0 The process AB BC CD and...
- Q An ideal monoatomic gas undergoes a process in 26 which the gas pressure relates to temperature as PT constant Then molar specific heat of gas in this process is 1...
- Q SolveLancer Test An ideal gas is heated from Ti to Tf in a closed vessel The difference between Tf and Ti is 5 C The pressure becomes times its initial...
- Q Aar has a mixture of hydrogen and oxygen gases in the ratio 1 5 the ratio of mean kinetic energy of hydrogen and oxygen molecule is 1 1 16 3...
- Q A monatomic ideal gas expands from i to fas indicated in the P V diagram below If 8 5 MJ of heat are absorbed by the gas during the process...
- Q 1 Two steady streams of air are mixed in a T junction as shown in the figure Stream one is at 32 C have a velocity and volumetric flow rate...
- Q The energy radiated by a black body at 2300 K is found to have the maximum at a wavelength 1260 nm its emissive power being 8000 Wm 2 When the...
- Q Q No 5 Marks 4 00 2 00 View In English A certain amount of ideal gas expands along the straight line path ABC on P V diagram as shown...
- Q b The volume occupied by a gas at 300 K is 1 0 lit mole Compare the corresponding pressures considering the gas to be i ii An ideal gas A...
- Q Two flasks of equal volume connected by a narrow tube of negligible volume contain 2 moles of H gas at 1 atm pressure and 300 K Now one of the...
- Q The number of molecules with energy range E is given by 3 2 TXT E1 2e E KT RKT n E 2nn Deduce the expressions for the following i The...
- Q One mole of an ideal gas is taken through the cyclic process shown in the V T diagram where V volume and T absolute temperature of the gas Which of...
- Q 12 At constant pressure the ratio of increase in volume of an ideal gas per degree rise in kelvin temperature to its volume is Manipal 2015 a 1 T b...
- Q Estimate the time needed for blood hemoglobin to diffuse a distance of 5 m in water at 20 C Assume the diffusion constant is 6 9x10 11 m 2 s...
- Q 53 A vertical cylinder closed at both ends is fitted with a smooth piston dividing the volume into two parts each containing one mole of air At the equilibrium temperature...
- Q 4 The volume of an air bubble becomes two times as it rises from the bottom of a lake to its surface Assuming atmospheric times of 1 pressure 75 cm...
- Q Q 2 Ms Usha a science teacher performed the following experiments Experiment 1 She heated sugar in a China dish A black substance was obtained along with caramel fumes Experiment...
- Q 36 According to which law all perfect gases change in volume by 1 273th of their original volume at 0 C for every 1 C change in temperature when pressure...
- Q of 27 C Keeping pressure constant the volume would be doubled by raising the temperature to 1 54 C 3 270 C 4 540 C 2 327 C A flask...
- Q 38 A ring shaped tube contains two ideal gases with equal masses and relative molar masses M 32 and 28 The gases are separated by one fixed M P and...
- Q a c 273 C 7 A room temperature the rms speed of the molecules of certain diatomic gas is found to be 1930 ms The gas is a H 1930...
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