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A block with a weight of 7.7 N is at rest on a horizontal surface. A 1.2 N upward force is applied to the block by means of an attached vertical string. What is the magnitude of the force of the block on the horizontal surface?
A 15 kg lawn mower is pushed with a constant force of 30.0 N at an angle of 37.0 degrees. What is the acceleration of the lawn mower
The discovery of a star orbiting the center of our galaxy with a 15-year period has led to the finding, calculate the semimajor axis of the star's orbit
A diver springs upward with an initial speed of 2.19 m/s from a 3.0-m board. What is the highest point he reaches above the water
A constant horizontal force Fa pushes a 3.70 kg FedEx package across a frictionless floor on which a xy coordinate system has been drawn. it gives the package's x and y velocity components versus time t. (The vx axis is marked in increments of 1.2..
The liquid level system shown in the below figure is initially at the steady state with the inlet flow rate at 1 cfm. Calculate the maximum & minimum values of the output.
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800kg/m3 , length 79.9cm, Calculate the weight of the rod, w
When the front of the train passes the worker. A 1500 kg car moving north at 27.0 m/s is struck by a 2165-kg car moving east at 18.0 m/s. The cars are stuck together. How fast and in what direction do they move immediately after the collision.
two charged particles, Q1=+4.60 nC and Q2=-2.50 nC, are separated by 32.0 cm. What is the eletrical potential energy of the pair
A flight attendant pulls her 65N flight bag a distance of 388m along a level airport floor at a constant velocity. The force she exerts is 38 N at an angle of 51° above horizontal.
A stable and highly soluble pollutant is dumped into a lake at the rate of 0.19 tonnes per day. The lake volume is 2E7 m3 and the average water flow-through rate is 8E4 m3 per day
A 95 g ice cube at 0°C is heated until 85 g has become water at 100°C, How much energy was added to accomplish the transformation
The half-life of iodine-131, an isotope used in the treatment of thyroid disorders, is 8.04 days. what is the activity of the sample
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