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A pith ball of mass 0.002kg is charged with 10-4 C. What is the magnitude of electric field intensity needed to keep the ball at rest in gravitational field?
A toy rocket engine lifts a mass of 4.5 kg to a height of 15.0 meters. At this height, the rocket is moving at 26.7 m/s. How much work was done by the rocket engine
Consider a 7 solar mass main sequence star, Estimate its luminosity in solar luminosities and how long (in years) it could maintain its luminosity through gravitational collapse
A(n) 84 g arrow is fired from a bow whose string exerts an average force of 110N on the arrow over a distance of 80cm. What is the speed of the arrow as it leaves the bow.
q1. a skier is accelerating down a 30.0deg hill at a 4.50 ms2a what is the vertical component of her acceleration? ms2
The 1 kg block is tied to the wall with a rope. It sits on top of the 2 kg block. The lower block is pulled to the right with a tension force of 20 N. The coefficient of kinetic friction at both the lower and upper surfaces of the 2kg block is = 0..
Carbon nanotubes are one of the stiffest and strongest materials known to scientists and engineers. Carbon nanotubes have an elastic modulus of 1100 GPa. If a carbon nanotube has a diameter of 15nm, determine the engineering stress sustained by th..
A certain suction cup has an air pressure of 80000Pa inside the suction cup. The suction cup covers an area of 2cm2. What is the largest mass that the suction cup can hold before failing
A Pendulum on Mars. A certain simple pendulum has a period on the earth of 1.65 s. What is its period on the surface of Mars, where g = 3.71 m/s2?
What is the relationship between impulse and motion? What is the relationship between pairs of forces in certain situations?
Describe the below physics terms in detalis :1. One Dimensional Motion2. Two and Three Dimensional Motion3. Parallelogram law of vector addition
A flight attendant pulls her 75 N flight bag a distance of 305 m along a level airport floor at a constant velocity. Find the work done by the force of friction on the flight bag
Two identical aluminium objects are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at the higher potential.
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