Agroup of physics students hypothesize that for an experiment they are performing, the speed of an object sliding down an inclined plane will be given by the expression v=2gd(sin(θ)−μkcos(θ))√. for their experiment, d=0.725meter, θ=45.0∘, μk=0.120, and g=9.80meter/second2. use your calculator to obtain the value that their hypothesis predicts for v.

v = 2.974

Explanation:

Perhaps the formula should be

v = √(2*g*d (sin(θ) - uk*cos(θ) )                    This is a bit easier to read.

v = √(2* 9.80*0.725(0.707 - 0.12*0.707) )   Substitute values. Find 2*g*d

v = √14.21 * (0.707 - 0.0849)                        Figure out Sin(θ) - uk cos(θ)  

v = √14.21 * (0.6222)

v = √8.8422                                                  Take the square root of the value

v = 2.974

Explanation:

As we know that the velocity expression for the given experiment is

now we know that

d = 0.725 m

now we have

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.