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Q. An iron box of 400 W power is used daily for 30 minutes. If the cost per unit is 75 paise, find the weekly expense on using the iron box.
Energy obsessive in 30 minutes = Power × time in hours
= 400 × ½ = 200 W h
Energy consumed in one week = 200 × 7 = 1400 Wh = 1.4 unit
Cost / week = Total units consumed × rate/ unit
= 1.4 × 0.75 = Rs.1.05
A satellite is goes form the surface of earth vertically and then is turned horixontally in space as it requires to revolve around the earth.
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Derive the equation of uniformly acceleration motion by analytical method.
A 2.1 kg block slides along a horizontal surface with a coefficient of kinetic friction μ k = 0.31. The block has a speed v = 1.4 m/s when it strikes a massless spring head-on.
how to get the formula ?.
Q. In 17 Cl 35, Compute the number of protons, neutrons and electrons. Number of electrons = 17, Number of protons = 17, Number of neutrons = 18
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i need to think of a project to assemble as soon as possible but i need some ideas.. what projects can i present??
which electromagnetic wave is used to detect forged documents
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