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What proofs are there that the Earth is rotating and that it is revolving around the Sun? What are the terrestrial planets, and why are they called this? Why can't we see the surface of Venus?
You pull with a force of 295 N on a rope that is attached to the block of mass 20 kg, and the block slides across the floor at a constant speed of 1.2 m/s. The rope makes an angle of 35 degrees with the horizontal.
Calculate the fugacity and the fugacity coefficient of phenol in a mixture of 20 mole % phenol (1) and 80 mole % oxygen (2) at 694.2 K and 24.52 bar using the following the ideal gas law.
A certain negative has an area in it (call it area A) that transmits 6.25 percent of thelight. What is the opacity of area A of the negative? Another area (call it area B) ofthe same negative has an opacity of 64. In terms of factors of two, how m..
two polarizers are oriented at 72 degress to one another. Unpolarized light falls on them. What fraction of the light intensity is transmitted
A person pushes horizontally with a force of 170 N on a 60 kg crateto move it across a level floor. The coefficient of kineticfriction is 0.25. (a) What is the magnitude of the frictionalforce? (b) What is the magnitude of the crate'sacceleration?
A light string is wrapped around a 0.160-kg hollow 0.080-m-radius hoop. The hoop is released from rest and the fee end of the string is held in place. What is tension in the string while the hoop falls
A 3-m2 hot black surface at 80°C is losing heat to the surrounding air at 25°C by convection with a convection heat transfer coefficient of 12 W/m2.°C, Determine the total rate of heat loss from the surface
You land on a new planet with radius 5000km. You measure the freefall acceleration due to gravity to be 8.5m/s^2 at the surface
The density of seawater is 1025 kg/m3 and and density of ice is 917 kg/m3. Compute the weight of the heaviest bear that the ice can support without sinking completely beneath the water
"A space explorer moving through the middle of intergalactic space, very far from any planet or star, notices a large rock floating around the cabin of the spaceship. The explorer wishes to take it as a specimen from an alien planet. Should he pus..
a 181 g ball is tied to a string. it is pulled to an angle of 4.0 c and released to swing as a pendulum. a student with
Use the information you obtained from your graph to determine the total mass of the system M = m1 + m2. Using the information you obtained in parts (a) and (b), predict what the value of the acceleration would be if the value of the hanging mass we..
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