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1. A 10-kg body is observed to have an acceleration of 5 m/s². What is the net force acting on it?
2. A force of 80N gives an object of unknown mass an acceleration of 20 m/s². What is its mass?
a mixture of ordinary hydrogen atom and tritium a hydrogen isotope whose nucleus is approximately 3 times more massive
A traffic light, weighing 668N is hung from the center of acable of negligible weight that is stretched horizontally btween two poles that are 18.3m apart. What is the tension in the cable
the aorta is the main artery from the heart. a typical aorta has an inside diameter of 1.7cm and carries blood at
You hold a ruler that has a charge on its tip 2 cm above a small piece of tissue paper to see if it can be picked up, What is the minimum charge required to pick up the tissue paper
Suppose we somehow knock out an electron from an atom. The energy level of the electron is -12.5 keV. Find the energy (keV) of the emitted photon
A robot holds a 20 meter long steel wire of diameter =2 cm that has a load of 25,000 N on it.. How much will the wire stretch under the load? What is the stress on the wire?
Assume the coefficient of static friction between the tires and the road on a Formula One car is 0.9 during a Grand Prix auto race. Find what speed will put the car on the verge of sliding
A rock is thrown vertically upward with an initial speed of 100 ft/s. At the same instant another rock is thrown vertically downward from the top of a 280 ft cliff with an initial speed of 40 ft/s. Find the time when the rocks pass each other
What are (a) x component and (b) y component of a vector in the xy plane if its direction is 329° counter clockwise from the positive direction of the x axis and its magnitude is 9.0 m.
Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 60.7 degrees. Find the the angle the resultant force makes with dog A's rope
Block 1, with mass m1 and speed 5.0 m/s, slides along an x axis on a frictionless floor and then undergoes a one-dimensional elastic collision with stationary block 2, How far into that region do the two blocks slide
a 370 ml soda can is 6.3 cm in diameter and has a mass of 21 g. such a soda can half full of water is floating upright
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