There are proponents of a new type of computing that uses strands of DNA in a test tube to perform computations–to solve problems like the "Traveling Salesman" problem. These proponents note that in a small volume, there are trillions of small DNA chunks that could (in effect) try trillions of different tours for the salesman, and report the shortest tour. Here's your question: Suppose the salesman has to visit N cities. How big does N have to be before the number of tours that he would have to test (in the worst case) is larger than a trillion?

Sally and sue were investigating the topic of friction in science. they used a small car and a ramp as seen in the picture to test what they were learning. they knew that they slipped easily on waxed floors but not on carpet, so they decided to change the material on the surface of the ramp to see what happened. they planned to use glass, carpet, aluminum foil, and sandpaper and run the car down the ramp over each surface. what would be the best research question to guide the girls' experiment? a) does the amount of surface area affect the friction on the moving car? b) will the car travel fastest on the glass surface? c) how does the angle of the ramp affect the speed of the car? d)do rougher surfaces tend to create more friction than smooth surfaces?

When you run, you begin to breathe heavier and faster. your heart beats more quickly, bringing more oxygen to your cells. which organ systems are working together here?

What are the 3 types of artificial cloning