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three forces acting on an object are given by f1=[-2.00i+2.00j]N,f2[5.00i-3.00j]N,f3[-45.0i]N.The object experiences an acceleration of magnitude 3,75 m/s to the power 2 .what is the direction of the acceleration
an object travels in a circle of radius 2.0 m. at time t 0 the object has a velocity of 10 ms and it slows uniformly
a car traveling 85km/h strikes a tree. the front end of the car compresses and the driver come to rest after traveling 0.80m
You make a capacitor by cutting the 12.5 cm diameter bottoms out of two aluminum pie plates, separating them by 3.50 mm , and connecting them across a 6.00-V battery. what will be the potential difference between them
q1. assume unpolarized light of intensity 197 wm2 falls on the polarizer in the figure and the angle in the drawing is
A grating has 530 rulings/mm and is 5.4 mm wide. How many higher orders of maxima can be seen
If the refractive index of air is 1.00029 and all the air is pumped out of the cell, how many fringe-pairs will shift by
q1. a father m 70 kg and son m 45 kg are standing facing each other on a frozen pond. the son pushes on father and
An impala is an African antelope capable of a remarkable vertical leap. What is the ratio of this force to the antelope's weight
A particular heat engine has a useful power output of 4.40 kW and an efficiency of 30.0%. The engine expels 7200 J of exhaust energy in each cycle. Find the energy taken in during each cycle
A 30g dart is shot straight up at 10m/s . At the same instant, a 24g ball of cork is dropped from 2.0m above the dart. What is the speed of the cork ball immediately after it is hit by the dart
A small superball of mass m moves with speed v to the right toward a much more massive bat that is moving to the left with speed v. Obtain the speed of the ball after it makes an elastic head-on collision with the bat
An astronaut is being tested in a centrifuge. The centrifuge has a radius of 12.0 m and, in starting, rotates according to ? = 0.31t2, what is the astronaut's radial acceleration
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