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Which of the following response(s) will lead to a null vector (?F=0)?1.Adding a force 2 blocks up and another force ?13 blocks at 33.7° up and to the left.2.Adding a force 2?2 blocks at 45° to the left and down and another force ?2 blocks at 45° to the left and up.3.Adding af force three blocks to the right and another force nine blocks to the left.4.Adding a force 15 blocks down and another force 15 blocks up and 3 to the left at an angle of 78.7° with the horizontal5.Adding a force 3 blocks to the left.
The radius of curvature of the curved side of a plano-convex lens made of glass (n=1.64) is 33cm
How much work does the electric field do in moving a -7.7 microCoulomb charge from ground to a point whose potential is +positive 55V higher.
A 180g air-track glider is attached to a spring. The glider is pushed in 12.4cm and released. A student with a stopwatch finds that 12.0 oscillations take 12.5s . What is the spring constant?
What is the voltage as a function of time accross a capacitor C connected in a single series loop with a resistor R, By what phase angle does current lead voltage
A thick cylindrical shell of inner radius a= 5 cm and outer radius b= 10 cm and has a net charge ZERO. find the inner and outer surface charge densities
A 72kg man climbs a 1192 m high mountain in 1.43 hour and uses 7.6kcal/min. What is the power ouTput in useful work
A wire 2.45 m long carries a current of 19.2 A and makes an angle of 48.8° with a uniform magnetic field of magnitude B = 1.18 T. Calculate the magnetic force on the wire
A crate is dragged 4.0m along a rough floor with a constant velocity by a worker applying a force of 450N to a rope at an angle of 30? to the horizontal
A physics student in a hot air balloon ascends vertically at constant speed. suppose the following four forces that arise in this situation.
The electric field lines on the left have twice the separation of those on the right. If the magnitude of field at point-A is 60 V/m, what is the magnitude of the field at point-B.
what is the cost of the electric energy equivalent to the energy in a Big Mac? (the cost of a Big Mac is $3.57)
A newly discovered planet has a mass of 7.88 x1026 kg, and has a satellite whose mass is 6.44 x 1011 kg. what is the gravitational attraction between them
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