Recent content by Ella1777

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    Physics Homework Help of converting to years (astronomy q)

    This has been solved hours ago on my own I was right and correct I'm just tired sometimes I even forget what the question is asking. I was tired but I got it correct it was just a blank out moment. That's why this post has been marked as solved no more assistance is needed but thanks anyways
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    Need help finding angular momentum of a particle

    1. At the instant of the figure, a 6.70 kg particle P has a position vector of magnitude 4.30 m and angle θ1 = 43.0° and a velocity vector of magnitude 3.40 m/s and angle θ2 = 32.0°. Force , of magnitude 7.40 N and angle θ3 = 32.0° acts on P. All three vectors lie in the xy plane. About the...
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    Physics Homework Help of converting to years (astronomy q)

    A star is 3.7 x 104 ly (light-years) from the center of its galaxy and is moving in a circle around that center at a speed of 170 km/s. (a) How long does it take the star to make one revolution about the galactic center? (b) How many revolutions has the star completed since it was formed about...
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    Finding the Kinetic Energy using the mass, radius and initial KE

    I’m not Martin Carr, as for I don’t understand anything of what he did if anything he confused me because I know conservation of energy must take place and I know what it looks like and he simply did not do that. I’m Ella1777 and I asked the question and he attempted to give me a solution that...
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    Finding the change in weight from the force & difference in height (y)

    The answer typed into Wileyplus must be 3 significant figures which rounds to 0.354 but only the final answer applies significant figures all the other work has to include all the digits
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    Finding the Kinetic Energy using the mass, radius and initial KE

    When working out the problem I have to quote all the significant figure or else points will be taken and it’s a risk to the wrong answer my professor says. When it comes to the final answer I do the sig figs and I typed in 3.0e7. Significant figures are usually the least of my problems it really...
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    Finding the Kinetic Energy using the mass, radius and initial KE

    So I just found kinetic energy only not the initial I’m assuming. Adding KE and PE will get my initial KE? Or do you mean KEi+KEf=PEi+PEf ?? If that’s the case then did I just solve for KEf and how do I find PEi and PEf? So I add KE: 3.0*10^7 to PE? How would I solve for PE? I’m sorry I’m...
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    Finding the change in weight from the force & difference in height (y)

    I forgot to put my units on this post but I already have the correct units on my homework the units are not my concern since I understand them get it right the majority of the time. As far as significant digits goes I have to write it all out our professor has stated that it’s the root of the...
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    Finding the change in weight from the force & difference in height (y)

    Information Given:In 1956, Frank Lloyd Wright proposed the construction of a mile-high building in Chicago. Suppose the building had been constructed. Question: Ignoring Earth's rotation, find the change in your weight if you were to ride an elevator from the street level, where you weigh 708...
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    Finding the Kinetic Energy using the mass, radius and initial KE

    Information Given:Zero, a hypothetical planet, has a mass of 4.2 x 1023 kg, a radius of 2.8 x 106 m, and no atmosphere. A 10 kg space probe is to be launched vertically from its surface. Question: (a) If the probe is launched with an initial kinetic energy of 5.0 x 107 J, what will be its...
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    Finding the net gravitational force with Vector Notation

    Information Given: In the figure, a square of edge length 17.0 cm is formed by four spheres of masses m1 = 4.70 g, m2 = 2.90 g, m3 = 0.800 g, and m4 = 4.70 g. Question: In unit-vector notation, what is the net gravitational force from them on a central sphere with mass m5 = 2.90 g? Attempted...
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    Should I use the arc tan of (ay/ax) or of (Fy/Fx) and why?

    Oh I see I tried it out and they got right around the same answer Thank you so much I understand now when I used forces got : 10.687 degrees when I used acceleration I got: 10.704 degrees I typed this in several times into wileyplus as 10.7 degrees but I keep on getting it wrong. Why am I...
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    Should I use the arc tan of (ay/ax) or of (Fy/Fx) and why?

    given: 128kg F1 = 28 N, F2 = 57 N, F3 = 38 N, θ1 = 30°, and θ3 = 60°.They are asking for the angle (measured relative to the positive direction of the x axis in the range of (-180°, 180°]) of the asteroid's acceleration? The problem is displayed on quadrant I and IV for vector notation I got...
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    A frictionless incline with a block sliding down it....

    Thank you thank you! I was not sure.
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    A frictionless incline with a block sliding down it....

    A frictionless incline (the triangle below) is bolted to the floor so that it can not move. A block of mass m slides down the slope, which makes an angle with the horizontal.a)Draw a free-body diagram for the block, labeling all forces uniquely. b)Describe all the forces listed above in the...
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