how did planetesimal form planets? a.) they broke apart to smaller chunks b.) they collied and stuck together c.) they colled and pulled ice together d.) they began to rotate what...

how did planetesimal form planets? a.) they broke apart to smaller chunks b.) they collied and stuck together c.) they colled and pulled ice together d.) they began to rotate what...

in a thermal pot, there is a layer of vacuum in the outer wall, an inner pot lid and an outer pot lid. Please help me to clarify these questions: 1....

A weightlifter holds a 150 kg weight 2 m from the floor. Calculate the speed which the weight hits the floor when dropped. You may assume that no energy leaves the system, and that the gravitational...

The following diagram (sorry, cant put in the diagram)shows what happened 10 minutes after the start of an experiment. The starch suspension in the membrane turned blue-black while the iodine solution...

For a stormwater drain and was wondering if you would be able to separate two liquids (underground) by boiling off the one at the lower temp rate. is that possible and if not do you have any other...

Can't find a answer on the internet

A cylinder contains 250 g of Helium at 200 K. The external pressure is constant at 1 atm. The system experiences an evolution of heat and the temperature change is 55 K. Calculate q. Express...

A 0.65 g sample of glucose (MW = 180. g/mol) is burned in a bomb calorimeter that has a heat capacity of 1.56 kJ/oC. The temperature of the calorimeter increases by 6.53oC. Calculate the molar...

A cylinder contains 250 g of Helium at 200 K. The external pressure is constant at 1 atm. The temperature of the gas inside the cylinder is then lowered by 97 K. Calculate q for this system...

Please look up the completed Lewis structure of atrazine and answer the following questions: -How many atoms are sp3 hybridized? -How many sigma bonds are in the completed...

Please help me

You are given a piece of metal alloy that is made of tin and copper. If the density of the sample is found to be 8.59 g/mL what is the % Sn and % Cu in the sample?

thank you!

I'm having a hard time with my chemistry lab, please help!

Calculate the rest energy and the kinetic energy of: a) A 100g ball travelling with the speed of 100m/s b) An electron travelling at a speed of 0.999c. Which one has greater...

Miguel starts a job working as a biochemist and earns $76,500 a year. He saves 10 percent of his income. After working for one year, he invests what he has saved in an account that pays 2.5 percent...

If a 0.06247 kg ice cube initially at 0.00 C is allowed to melt in a Styrofoam cup holding 0.497 kg of water at 10.0 C , what is the total entropy change for this process?

I am stuck on this one question on my science homework, and I would like to know how to answer it so I can be ready for a quiz, too. Please help. Suppose a comet passes the sun every...

two rocks that are not igneous metamorphic or sedimentary?help please

I've been working on this for awhile, but I'm not sure if I'm really getting it. If a patient injects, into the venous system, a polar molecule that, when placed in a test-tube with isolated protein...

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