Physics, 07.11.2019 01:31 naysia2006
If a rock is thrown upward on the planet mars with a velocity of 18 m/s, its height (in meters) after t seconds is given by h = 18t − 1.86t2. (a) find the velocity of the rock after one second. 14.28 correct: your answer is correct. m/s (b) find the velocity of the rock when t = a. correct: your answer is correct. m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = incorrect: your answer is incorrect. s (d) with what velocity will the rock hit the surface? m/s
Answers: 2
Physics, 21.06.2019 22:50, periwinkleaqua72
An electron and a proton have the same kinetic energy upon entering a region of constant magnetic field and their velocity vectors are perpendicular to the magnetic field. suppose the magnetic field is strong enough to allow the particles to circle in the field. note: you'll need to look up the masses for an electron and proton. 1) what is the ratio of the radii of their circular paths rp/re?
Answers: 3
Physics, 22.06.2019 05:00, ajajjsisi9x8
Which is the best predictor of the radioactive nature of an isotope? o the proton-to-electron ratio the neutron-to-proton ratio o the neutron-to-electron ratio the electron-to-proton ratio
Answers: 1
Physics, 22.06.2019 09:00, edgarsandoval60
Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.
Answers: 3
If a rock is thrown upward on the planet mars with a velocity of 18 m/s, its height (in meters) afte...
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