13. If I observe a galaxy with an apparent velocity ofrecession of 1500 km/s, and Hubble’s constant is 75km/s/Mpc, how far away is the galaxy?A. 2 Mpc; about 6.5 million light yearsB. 5 Mpc; about 16 million l.y.C. 10 Mpc; about 33 million l.y.D. 20 Mpc; about 67 million l.y.E. 200 Mpc; about 670 million l.y.D2. Which direction in the sky would you look tosee the big bang?A. you won’t see it in any directionB. I don’t know: some random (but fixed) direction?C. depends on time of year (where sun is in sky)D. it’s in every direction you lookE. sidewaysD3. Which one is a match?A. left pictureB. middle pictureC. right pictureD. none of the aboveE. all look okay to meB4. When we say the universe is flat, we mean:A. The angles inside a triangle add to 180°B. Parallel lines remain parallel foreverC. Space is infinite in extentD. None of the aboveE. All of the aboveE5. How many planets total (including aroundother stars) have we identified thus far?A. Just the 8 (9 with Pluto) in our solar systemB. Something like 15: some around other starsC. A little over 60D. Almost 300E. Over 100,000D1. If the nucleus is 10-5 times the size of the atom’selectron cloud, how big would an electron cloud beif the nucleus were the size of a sand grain (1 mm)?A. 0.1 metersB. 1 meterC. 10 metersD. 100 metersE. 1 kmD2. Why do different elements have different chemicalbehaviors?A. they just do, manB. the properties of the electron cloud dictate behaviorC. the number of neutrons in the nucleus determine behaviorD. the number of protons in the nucleus determine behaviorE. the total number of nucleons (protons plus neutrons)determines behaviorB3. Collections of three quarks are called baryons(protons, neutrons belong). The baryon called theDelta particle is made of three up quarks. What isits charge?A. No way I can know thisB. +2/3C. +2D. +3E. -2C1. A yellow car is heading East at 100 km/h and a redcar is going North at 100 km/h. Do they have thesame speed? Do they have the same velocity?A. same speed, same velocityB. same speed, different velocityC. different speed, same velocityD. different speed, different velocityB22. A 16-lb bowling ball in a bowling alley in Del Marheads due north at 10 m/s. At the same time, apurple 8-lb ball heads due north at 10 m/s in analley in La Jolla. Do they have the same speed?Same velocity?A. same speed, same velocityB. same speed, different velocityC. different speed, same velocityD. different speed, different velocityA3. A sprinter who is running a 200 meter race coversthe second 100 meters in less time than it takes tocover the first 100 meters. Why?A. Drafting takes hold once up to speedB. The more upright posture produces less air dragC. The runner’s metabolism kicks in for the second halfD. The runner spends the first half acceleratingD4. If you are driving East and apply the brakesto stop your car, in what direction are youaccelerating?A. you’re not acceleratingB. accelerating to the eastC. accelerating to the westD. the direction is indeterminateC1. If identical forces act on two objects, whereobject A is twice as massive as object B, howdo their accelerations compare?A. same accelerationsB. A accelerates twice as much as BC. B accelerates twice as much as AD. A and B accelerate in different directionsforceA BC2. If I double the mass of an object, by whatfactor must I change the applied force tomaintain a certain acceleration?A. the force stays the sameB. you must double the forceC. you must cut the force in halfD. there is no set rule for thisB3. If one force pulls an object to the East, whilea second force of equal magnitude pulls it tothe West, what is the object’s acceleration?A. It will slip out to the north or southB. It will accelerate to the eastC. It will accelerate to the westD. It will not accelerate under balanced forcesD4. If you observe a 1000 kg car accelerating forward at2 m/s2, what is the force acting on the car?A. there is not necessarily a forceB. 500 Newtons toward front of carC. 1000 Newtons toward back of carD. 2000 Newtons toward back of carE. 2000 kg·m/s2 toward front of carE5. If something is accelerating at 4 m/s2 in thedirection opposite its velocity, and it starts with avelocity of 20 m/s, how long will it take to be goingonly 8 m/s in the original direction?A. it won’t: it’ll be speeding upB. 1 secondC. 2 secondsD. 3 secondsE. 4 secondsD1. A ball falls from rest for 4 seconds. Neglecting airresistance, during which of the 4 seconds does theball’s speed increase the most?A. the increase is the same in each secondB. the increase is greatest in the first secondC. the increase is greatest in the second secondD. the increase is greatest in the third secondE. the increase is greatest in the fourth secondA32. If you drop a ball from a height of 4.9 m, it will hitthe ground 1 s later. If you fire a bullet exactlyhorizontally from a height of 4.9 m, how long will ittake to hit the ground?A. less than one secondB. also exactly 1 secondC. something longer than one secondD. never, if fired perfectly horizontallyB3. If you throw a ball upward with a velocity of 20m/s, how long will it take to reach its maximumheight?A. there’s no way to know this with the given infoB. 0.5 secondsC. 1.0 secondsD. 2.0 secondsE. 3.0 secondsD4. How high will the ball from the previous problemtravel to reach the top of its trajectory?A. 2 metersB. 5 metersC. 10 metersD. 20 metersE. 40 metersD5. If I have four forces pulling in the cardinal directions ofnorth, south, east, and west with forces measuring 10, 20, 5,and 15 Newtons, respectively, how much net force is on theparticle?A. impossible to sayB. 5 Newtons to southC. 10 Newtons to westD. about 14 Newtons to southwestE. don’t know the number, but to northeastD1. Which of the following does not derive from ofNewton’s laws of motion?A. things like to stay in their present state of motionB. momentum is unchanged by collisions of particlesC. you cant push something without it pushing backD. it’s hard to get heavy things to moveE. All are consistentB2. If the earth’s gravity exerts 2 Newtons of force on afalling apple, how much force does the apple exerton the earth?A. zero Newtons if it is falling (neglecting air)B. a very small amount depending on mass ratioC. zero Newtons until it rests on the ground, at which pointit’s 2 ND. 2 Newtons at all times, no matter whatD3. If a 100 kg satellite in low earth orbit exerts about1000 N on the earth, how much does the satelliteaccelerate; how