Recent content by MoniMini

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    Why Does the Image in a Plane Mirror Appear to Move at a Different Speed?

    In the first case 4D. In the second case 2D. Ah, I see... Just as the car approaches the truck, so does the image of the car in the mirror, therefore the apparent distance covered is 2 times the actual distance covered by the car. So, can we conclude that since 2 = d/t, 2d/t= 2(2)=4 ?
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    Why Does the Image in a Plane Mirror Appear to Move at a Different Speed?

    Suppose a driver his reversing his car with a speed of 2m/s, the driver sees in his rear-view mirror (which is a plane mirror) the image of a truck parked behind his car. What will be the speed at which the image of the truck appears the driver? According to me, since the distance between the...
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    Relating increament of speed to time

    Umm...That's the problem...I'm not being able to do that :(
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    Relating increament of speed to time

    Aditya rides a bicycle from town P to town Q with a constant speed. If he increases his speed by 3 m/s, he will arrive to town Q three times faster. How many times faster will Aditya arrive to town Q, if he increases his speed by 6 m/s s=\frac{d}{t} [b] Let his constant speed be x...
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    Mixing water at different temperatures

    Thanks a TON! You explained it really well. I got the correct anser. I don't know how to type in the mathematical symbols and all, but on paper I calculated and the result was 63.8°C which is the correct answer. Thanks again :) ~MoniMini
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    Speed of a Satellite at 320 kn: Calculate Time Period

    Hi ! "What is the speed of a satellite which is at a height of 320 kn and has a time period of 90 minutes" I've never come across such a question ever before. Is there any formula to solve this problem? or do we have to use S= d/t And what exactly does "time period" mean here? The time...
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    Mixing water at different temperatures

    Hello all, I'm having trouble solving the given problem. "Assuming that no heat is lost to the surrroundings, what will be the final temperature when 1 kg of water at 10°C is mixed with 5 kg of water at 80°C" Taking the mean of the 2 fluids will not help here since their mass is...
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    Gravity on Moon: How Much Weight Can a Person Lift?

    Hello, We had a Science test today and just after the test the teacher gave out the answers to all questions. I had a doubt which I wanted to ask. Hope you can help me... Homework Statement A person can lift 60 kg of weight on the Earth. How much weight will the respective person be...
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    Calculating Object Height Using a Pinhole Camera

    There is no diagram attached to the question :rolleyes:
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    Calculating Object Height Using a Pinhole Camera

    I don't have any idea how to go about this... Please help!:frown: A pinhole camera produces an image of an object kept at a distance of 100m from the pin hole. If the screen is 10 cm from the pin hole and the image is 5 cm high, what is the height of the object Any help will be...
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    Period of a Pendulum | Calculate in 1.2s

    Thnx a Lot Simon Sir! I didn't know what a period is (i'm just in the 6th grade :P) so I assumed it is something like L - S - R - S - L... Thnx for the clarification :smile:
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    Period of a Pendulum | Calculate in 1.2s

    I am getting confused regarding what a 'period' in a pendulum is. In a recent Olympiad/Exam I was given this question... Can you please give me the method in which it can be done so that I can solve these type of questions with ease if they appear in future... Thanks :smile: A Pendulum...
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