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A truck moves 70 m east, then moves 120 m west, andfinally moves east again a distance of 90 m. If east ischosen as the positive direction, what is the truck's resultant displacment?
A bicyclist of mass 75 kg ( including the bicycle) can coast down a 4.0 degree hill at a constant speed of 10 km/h. Pumping hard,the cyclist can descend the hill at a speed of 30 km/h.
A block of weight 43.6 N is hanging from a rope. The tension from the rope is pulling upward on the block. What is the magnitude of the tension in the rope
Occasionally, huge icebergs are found floating on the ocean's currents. Suppose one such iceberg is 134 km long, 39.4 km wide, and 187 m thick.
An ideal gas consists of n moles of diatomic molecules that rotate but do not oscillate. What is the change in the mean free path of the molecules
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 19.0 m/s at an angle 48.0 degrees; What is the time the ball is in the air
A person of mass 73kg stands at the center of a rotating merry-go-round platform of radius 3.5m and moment of inertia 950kg kg m^2. Calculate the rotational kinetic energy of the system of platform plus person after the person's walk
A 5570kg open train car is rolling on frictionless rails at 23.6m/s when it starts pouring rain. What mass of water has collected in the car
In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, What should be the radius of curvature of the cornea
For high frequency sounds, the ear's principle method of localization is the difference in intensity sensed by the two ears. why can't the ear reliably use this method for low-frequency sounds? doesn't the head cast a "sound shadow" regardless of ..
A mirror with a focal length 20 cm has a 4.0 cm tall object placed 100 cm in front of it. What is the position of the image?
A collimated beam of microwaves impinges on a metal screen that contains a long horizontal slit that is 20cm wide. A detector moving parallel to the screen in the far-field region locates first minimum of irradiance at an angle of 36.8° above the ..
A thin uniform rod has a length of 0.450m and is rotating in a circle on a frictionless table. What is the mass of the bug
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