Recent content by Arif Setiawan

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    High School What exactly happens when touch a surface

    Hello, I'm accidentaly confused when my mate ask me "what actually happen when touch a surface of mass, ie: table, chair, etc). Which we are know that 99,999999999% of atom is space" Is we really touch atom? Help me please
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    High School Dynamic Fluid (airplane landing/decrease altitude)

    That's the aspect that I haven't see before.. Thanks for these clear information
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    Finding Projectiles' Flight Times....

    You can view from vertical perspective.. from ground to max for each projectile. First, vy=100.. using vt=v-gt t=v/g=100/10=10s Second, vy=100.sin30=50 m/s t=5seconds Total time for projectile 1 is 20s Time for projectile 2 is 10s So difference/time elapse is 20-10=10s
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    High School Dynamic Fluid (airplane landing/decrease altitude)

    Hi guys.. I've some discussion with my friend. We are teacher. So we must carefully to answer question for student.. there the question is From figure below, p2 and p1 applied on plane's wings. When airplane landing/decrease altitude, which condition must occupied A. P1=P2 and v1=v2 B. P1<P2...
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    High School Difference between distance in physics and math

    I get your point. In math, expected answer just magnitude. So, I think better term is "distance" as like my math teacher said. Thanks in advance
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    High School Difference between distance in physics and math

    Hai guys.. Today I've some discussion with math teacher. He wrote a question for his student about displacement. (Somehow A boat go to west 3 km, then move to north 4km. How is distance between A to the end?) In my opinion, that question better stated as "How is displacement". But in math...