Physics, 14.04.2020 23:41 fancycar14
You shine a flashlight beam toward the Moon, estimate the diameter of the beam when it reaches the Moon. Assume that the beam leaves the flashlight through a 4.0 −cm aperture, that its white light has an average wavelength of 550 nm, and that the beam spreads due to diffraction only. Express your answer using two significant figures.
Answers: 2
Physics, 22.06.2019 07:30
Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?
Answers: 3
Physics, 22.06.2019 15:00
Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle θ = 21° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the student’s feet. assume that the balloon moves without air resistance. use a cartesian coordinate system with the origin at the balloon's initial position. (a) what is the position vector, rtarge t, that originates from the balloon's original position and terminates at the target? put this in terms of h and d, and represent it as a vector using i and j. (b) in terms of the variables in the problem, determine the time, t, after the launch it takes the balloon to reach the target. your answer should not include h. (c) create an expression for the balloon's vertical position as a function of time, y(t), in terms of t, vo, g, and θ. (d) determine the magnitude of the balloon's initial velocity, v0, in meters per second, by eliminating t from the previous two expressions.
Answers: 3
Physics, 22.06.2019 20:10
Consider two less-than-desirable options. in the first you are driving 30 mph and crash head-on into an identical car also going 30 mph. in the second option you are driving 30 mph and crash head-on into a stationary brick wall. in neither case does your car bounce off the thing it hits, and the collision time is the same in both cases. which of these two situations would result in the greatest impact force?
Answers: 1
You shine a flashlight beam toward the Moon, estimate the diameter of the beam when it reaches the M...
Mathematics, 16.09.2020 03:01
History, 16.09.2020 03:01
World Languages, 16.09.2020 03:01
Social Studies, 16.09.2020 03:01
Social Studies, 16.09.2020 03:01
Social Studies, 16.09.2020 03:01
Social Studies, 16.09.2020 03:01
Social Studies, 16.09.2020 03:01
English, 16.09.2020 03:01
Mathematics, 16.09.2020 03:01
Mathematics, 16.09.2020 03:01
Chemistry, 16.09.2020 03:01
Mathematics, 16.09.2020 03:01
Mathematics, 16.09.2020 03:01
Mathematics, 16.09.2020 03:01
Social Studies, 16.09.2020 03:01
Mathematics, 16.09.2020 03:01
Mathematics, 16.09.2020 03:01
Mathematics, 16.09.2020 03:01
Mathematics, 16.09.2020 03:01