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Two cars collide at an intersection. Car A, with a mass of 1900{kg} , is going from west to east, while car B, of mass 1500{kg} , is going from north to south at 17.0{m}/{s} . As a result of this collision, the two cars become enmeshed and move as one afterwards. In your role as an expert witness, you inspect the scene and determine that, after the collision, the enmeshed cars moved at an angle of 65.0 degree south of east from the point of impact. How fast were the enmeshed cars moving just after the collision? How fast was car A going just before the collision?
One January morning, a warm chinook wind rapidly raised the temperature in Spearfish, South Dakota, from below freezing to +11.1° C. Find the average speed at which its height would decrease
A brick is released with no initial speed from the roof of a building and strikes the ground in 2.70 {rm s}, encountering no appreciable air drag. How tall is building? How fast is the brick moving just before it reaches the ground.
A 74 kg man in a 5.0 kg chair tilts back so that all the weight is balanced on two legs of the chair. find the pressure exerted by each leg on the floor
how much work was done by her force acting on the car
Assume that light of wavelength 550 nm is being observed. Also suppose that diffraction effects, rather than atmospheric turbulence, limit the resolving power of the telescope. Find the greatest distance that these stars might be from the earth.
q1. a large tanker truck can carry 30 ton of liquid. a what volume of water can it carry? b what volume of gasoline can
A van is approaching a stationary motion detector at 45 m/s. The motion detector emits ultrasonic sound waves toward the van, what is the frequency of the reflected sound measured by the detector
A uniform magnetic field of magnitude B = 0.020 T is in the positive y-direction. Determine the magnitude and direction of the magnetic force on each segment.
A fish swimming in a horizontal plane has a velocity vi = (3.3i + 1.6j) m/s at a point in the ocean where the position relitive to a certian rock is ri = (10.5i - 3.9j) m. After the fish swims with a constant acceleration for 20.6 s, it's velocity..
A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 44 dB by an observer 10 km away. What is the average power generated by the horn
An elevator is moving up at a constant velocity of 2.5 m/s Calculate the force the floor exerts on the passenger, Calculate the force the floor exerts on the passenger
A 120 kg hiker puts on a pair of snowshoes that have an effective combined surface area of 0.80 square meters. How much pressure does he exert on the snow
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