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In opening the door, a person pushes at a point on the door 65 cm from the hinges with a force of 50 N that is directed at an angle of 75 degree with respect to the surface of the door. The torque on the door about its hinges is?
An Olympic long jumper leaves the ground at an angle of 19.8 ° and travels through the air for a horizontal distance of 6.79 m before landing. What is the takeoff speed of the jumper
A high-energy pulsed laser emits a 1.5-ns-longpulse of average power 1.8×1011W. find Determine the energy delivered in each pulse.
An electron is observed traveling at a speed of 2.38 107 m/s parallel to an electric field of magnitude 11,460 N/C. How far will the electron travel before coming to a stop
A ruby laser emits an intense pulse of light that lasts a mere 30 ns. The light has a wavelength of 690 nm , and each pulse has an energy of 700 mJ. How many photons are emitted in each pulse
q1. far in space where gravity is negligible a 450 kg rocket travelling at 77 ms fires its engines. the thrust force as
Two teams of nine members each engage in a tug of war. what is the tension in the section of rope between the teams
basic math in real world applications1. describe a real-world problem you have encountered in either your personal or
A 0.840-kg block oscillates on the end of a spring whose spring constant is k= 42.0 N/m . The mass moves in a fluid which offers a resistive force F=-bv, where b = 0.640 N*s/m. What is the fractional decrease in amplitude per cycle?
A capacitor with capacitance C = 4.10·10^-6 F is connected to an AC power source having a peak value of 6.0 V and f = 130 Hz. Find the reactance of the capacitor
A cylinder of radius a = 9.4 cm and height h = 9.5 cm is aligned with its axis along the y-axis as shown. What is the total flux ? that passes through the cylindrical surface? Enter a positive number if the net flux leaves the cylinder and a negat..
Use the force or spring constant from part (a), compute the potential energy stored in the spring when the spring is displaced 2.40 cm
Two small metallic spheres, each of mass 0.20 g, are suspended as pendulums by light strings from a common point, what is the magnitude of the charge on each sphere
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