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A motorist drives north for 38.0 minutes at 67.0 km/h and then stops for 15.0 minutes. He then continues north, traveling 130 km in 1.60 h. What is the displacement and average velocity?
q1. a 58.0-kg projectile is fired at an angle of 30.0deg above the horizontal with an initial speed of 1.26 102 ms from
Swift is a spacecraft that has a collecting area of 0.520 m2 to detect gamma-ray bursts (GRBs). find the amplitude of the magnetic field of the source
A 20.0L tank contains 0.225kg of helium at 18.0%u2218C. The molar mass of helium is 4.00g/mol. How many moles of helium are in the tank
A hypothetical 40cm long arm is assumed to be weightless. What is the maximum weight that can be held in the hand if the muscle is attached 1 cm from the below
A long aluminum rod is struck at one end. At the other end an observer close to the rod, hears the sound of the blow twice, What is the length of the rod
a 12.0 g plastic ball is dropped from a height of 2.50 m, How much mechanical energy was lost during the balls fall
A college student renting in a home has a circuit box capable of drawing only 25.0 A before blowing a fuse. With the common wall voltage of 120 V, calculate the maximum power that this home may use
A softball of mass 0.220 kg that is moving with a speed of 5.5 m/s collides head-on and elastically with another ball initially at rest. estimate the velocity of the target ball after the collision
How many 185 W lightbulbs can you use in a 191 V circuit without tripping a 15 A circuit breaker? (The bulbs are connected in parallel, which means that the potential difference across each lightbulb is 131 V.)
An iron wire with a diameter of 1.2 mm has a uniform electric field of 0.35 V/m imposed along its entire length. What is the current density in the wire
Light of wavelength 530 nm is incident normally on a diffraction grating. Two adjacent maxima occur at angles given by sinθ = 0.2 and sinθ = 0.3, respectively. What is the separation between adjacent slits
q1. a man lifts a 22.4 kg bucket from a well and does 6.7 kj of work. the acceleration of gravity is 9.8 ms2.how deep
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