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I would like to know if it was possible to make an object appear or disappear in a room what would happen with the addition of subtraction of this mass? If it was the size of a human would it cause a shockwave/explosion if it appeared and cause a black hole if it disappeared?

You throw a small rock straight up from the edge of a highway bridge that crosses a river. The rock passes you on its way down, 7.00 s after it was thrown. What is the speed of the rock just before it reaches the water 29.0 m below the point where the rock left your hand? Ignore air resistance.

You throw a small rock straight up from the edge of a highway bridge that crosses a river. The rock passes you on its way down, 9.00 s after it was thrown. What is the speed of the rock just before it reaches the water 25.0 m below the point where the rock left your hand? Ignore air resistance.

A constant-volume gas thermometer is calibrated in dry ice (that is, carbon dioxide in the solid state, which has a temperature of -80.0°C) and in boiling ethyl alcohol (78.0°C). The two pressures are 0.900 atm and 1.635 atm. (a) What Celsius value of absolute zero does the calibration yield? What is the pressure at (b) the freezing point of water and (c) the boiling point of water?

Hi there, I I have a question about Physics/chemistry.

If I have a bag of iron oxide(lll) and powdered aluminium in the ratio of 3:1 totalling 72g, with 54g being Fe2O3 and 18g of 2Al, what would the temperature be when it burns during the exothermic reaction? Can you provide full working out please?

Thank you very much

P.S the powder would be mixed and put in a plant pot.

If I have a bag of iron oxide(lll) and powdered aluminium in the ratio of 3:1 totalling 72g, with 54g being Fe2O3 and 18g of 2Al, what would the temperature be when it burns during the exothermic reaction? Can you provide full working out please?

Thank you very much

P.S the powder would be mixed and put in a plant pot.

It is desired to double the efficiency of a carnot engine from 35% by raising its temperature of heat addition, while keeping the temperature of heat rejection constant. What percentage of increase in high temperature is required?

a body is moving with a velocity of 10m/s in north east direction then its acceleration

1. A sample of krypton gas at a pressure of 1.01 atm and a temperature of 29.8 °C, occupies a volume of 11.7 liters. If the gas is compressed at constant temperature to a volume of 6.67 liters, the pressure of the gas sample will be __ atm.

2. A sample of neon gas at a pressure of 0.963 atm and a temperature of 23.5 °C, occupies a volume of 621 mL. If the gas is allowed to expand at constant temperature until its pressure is 0.660 atm, the volume of the gas sample will be mL.

3. A sample of krypton gas at a pressure of 800 mm Hg and a temperature of 32 °C, occupies a volume of 14.8 liters. If the gas is cooled at constant pressure to a temperature of 6 °C, the volume of the gas sample will be L.

4. A sample of neon gas at a pressure of 0.782 atm and a temperature of 244 °C, occupies a volume of 558 mL. If the gas is heated at constant pressure until its volume is 727 mL, the temperature of the gas sample will be °C.

2. A sample of neon gas at a pressure of 0.963 atm and a temperature of 23.5 °C, occupies a volume of 621 mL. If the gas is allowed to expand at constant temperature until its pressure is 0.660 atm, the volume of the gas sample will be mL.

3. A sample of krypton gas at a pressure of 800 mm Hg and a temperature of 32 °C, occupies a volume of 14.8 liters. If the gas is cooled at constant pressure to a temperature of 6 °C, the volume of the gas sample will be L.

4. A sample of neon gas at a pressure of 0.782 atm and a temperature of 244 °C, occupies a volume of 558 mL. If the gas is heated at constant pressure until its volume is 727 mL, the temperature of the gas sample will be °C.

swarnbhashm is a cosmetic medicene in which found 400ppm colydee gold.what is the mass% of gold?

when 20ml mixture of O2 and O3 is burned.volume became 29ml and invisible in basis payregalol solution.what is the volume% of oxygen gass in real mixture?