Recent content by ally.hady

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    Chemistry: Electro chemistry help PLEASE?

    Chemistry: Electro chemistry help! PLEASE? Photographic film contains a thin layer of silver bromide (AgBr) Crystals. When the light hits the film. Electrons are transferred from the Br- to the Ag + ions. Dark patches of metallic silver appear on the film where the lens of the camera focused...
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    Waves question (wavelength, period, etc)

    can anyone please help me? i have a final exam tomorrow :(
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    Waves question (wavelength, period, etc)

    what about the other questions any tips?im lost
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    Waves question (wavelength, period, etc)

    so 3.00x10^8 m/s / 300,000 = wavelength?
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    Waves question (wavelength, period, etc)

    Homework Statement A transmitter sends out 1.8x10^7 waves per minute and generates a standing wave pattern. The radio waves travel at the speed of light to a receiver 20.0km away. Determine : a) the frequency in herts b) period c)wave length d) the time for one crest to travel from the...
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    Physics:series of 3 lenses calculate mag

    thankyou sir
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    Physics:series of 3 lenses calculate mag

    Diagrams i thought of it before but it takes too much time and our teacher has allowed us to use diagrams on the test coming up but he also told us its not worth it due to the time distribution for all of the questions. do you think i can do this without drawing a diagram? forexample use the...
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    Thermal physics; specific heat capacity

    gold penny lab, i remmber doing this it was fun. sorry we didint have these questions, maybe you should search for gold penny lab.
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    Physics:series of 3 lenses calculate mag

    Homework Statement An object is placed 10.0 cm from a series of 3 lenses. The first lens has focal length of 5.00 cm, the second lens has a focal length of 9.00 cm and the final lens has a focal length of 3.00 cm. the distance between each lens is 25.0 cm. Find the final position of the image...
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    Solving for Melting Ice: 500g Lead & -10C Ice Block

    wow ur smart, ok i will do that
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    Solving for Melting Ice: 500g Lead & -10C Ice Block

    but i don't have the specific heat capactiy on the sheet given to me so how do i find the heat?
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    Solving for Melting Ice: 500g Lead & -10C Ice Block

    q=mcDeltaT Q=52kg(2100 j/kg C) (0C-(-10C)) Q= 1092 Kj thats the amount of heat needed to bring its temperature to 0 degree now where do i go from here?
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    Solving for Melting Ice: 500g Lead & -10C Ice Block

    Homework Statement a 500 g lead mass is heated to 150 C and placed on a block of ice at -10 C. how much ice, if any will melt? 52 kg = block of ice Homework Equations The Attempt at a Solution i didint know where to start so i did qmcdeltaT + qmcdeltaT = 0, and i failed at it i...