Cheetahs can accelerate to a speed of 19.3 m/s19.3 m/s in 2.55 s2.55 s and can continue to accelerate to reach a top speed of 31.0 m/s31.0 m/s . assume the acceleration is constant until the top speed is reached and is zero thereafter. let the +x+x direction point in the direction the cheetah runs. express the cheetah's top speed in miles per hour (mi/h)(mi/h) . =vtop= mi/hmi/h starting from a crouched position, how much time does it take a cheetah to reach its top speed and what distance does it travel in that time? =taccel= ss =d= mm if a cheetah sees a rabbit 137.0 m137.0 m away, how much time will it take to reach the rabbit, assuming the rabbit does not move and the cheetah starts from rest?

Which of the following elements is in the same period as phosphorus? a. carbon c. nitrogen b. magnesium d. oxygen select the best answer from the choices provided a b c d

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon

Fill in the blanks with the numbers is a measure of the resistance to flow. a high liquid has a high resistance to flow and flows slowly. the ancients thought everything in the world was made of 4 we now know that there are 94 naturally occurring and scientists have created another 24 i am certain they will create even more. honey flows slowly because it has a high to flowing. a can be separated by physical means because it contains more than one pure substance and 2 pure substances are not chemically bonded to each other. a cannot be separated by physical means. all matter is made up of all elements are with the same number of protons. if it is just a single or many bonded together, if all of them have the same number of protons, it is an element. in a piece of pure iron metal, all the are joined together, that piece of iron metal is called elemental iron. a single of iron is called elemental iron. a mixture has differences from place to place. we might need a microscope to see them or they might be obvious to the unaided eye. there are surfaces separating it into different phases. a mixture is the same everywhere. it is uniform. there are no surfaces separating it into different phases. if different kinds of atoms (different elements) are bonded together by their electrons, it is called a there are physical means of to isolate the different pure substances in a mixture and there are chemical means of to isolate the different elements in a compound. 1. element 2. compound 3. mixture 4. heterogeneous 5. homogeneous 6. pure substance 7. atoms 8. separation 9. viscosity 10. resistance