Which of the following is an example in which you are traveling at constant speed but not at constant velocity? a) rolling freely down a hill in a cart, traveling in a straight line b) driving backward at exactly 50 km/hr c) driving around in a circle at exactly 100 km/hr d) jumping up and down, with a period of exactly 60 hops per minute e) none of the above

It's a snowy day and you're pulling a friend along a level road on a sled. you've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you've been walking at a steady 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .

Calculate the minimum energy required to remove one proton from the nucleus 126c. this is called the proton-removal energy. (hint: find the difference between the mass of a 126c nucleus and the mass of a proton plus the mass of the nucleus formed when a proton is removed from 126c.) express your answer with the appropriate units. emin e m i n = nothing nothing request answer part b how does the proton-removal energy for 126c compare to the binding energy per nucleon for 126c, calculated using eb=(zmh+nmn−azm)c2?

Each line (unit) on the horizontal axis represents: 5 years 10 years 20 years all of the above