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A 663 kg elevator starts from rest it moves upward 2.7s with aconstant acceleration until it reaches its cruising speed of 1.63m/s
What is the average power of the elevator during this period? What is the power during an upward cruise with constant speed?
A 4.0-m-long iron bar of uniform cross section is held perpendicular to the wall by a wire from the end of the bar to the wall, what is the magnitude of the vertical component of force produced by the wall
A penny sits 20 cm from the axis on an old record, which is spinning at 45 rpm. find the coefficient of friction between the penny and the record
If 61.5 L of oxygen at 18C and an absolute pressure of 2.45 atm are compressed to 48.8L and at the same time the temperature is raised to 56 degrees C, what will the new pressure be
The element antimony has an atomic weight of 121.757 amu and only two naturally occuring isotopes. what is the mass of the other isotope
A car is travelling at a constant speed of 32m/s on a highway. At the instant this car passes an entrance ramp, a second car enters the highway from ramp.
An 900 kg purple pickup truck tows a small 200 kg trailer using a relatively lightweight tow rope. The position of the trailer is given in m and time is in s. What is magnitude of the net force on the trailer
A person pushes a 19.7-kg shopping cart at a constant velocity for a distance of 21.3 m on a flat horizontal surface. What is the magnitude of the force that the shopper exerts
A piece of glass has a temperature of 71.0 °C. Liquid that has a temperature of 38.0 °C is poured over the glass, evaluate the specific heat capacity of the liquid
A transparent rod 30.0 long is cut flat at one end and rounded to a hemispherical surface of radius 10.0 cm at the other end. What is its apparent depth when viewed from the curved end
A woman on a bicycle traveling at 10m/s on a horizontal road stops pedaling as she starts up a hill inclined at 3.0 degrees to the horizontal
A wire loop that encloses an area of 10 cm2 has a resistance of 5 Ohms. How much charge flows past a point in the wire
The pressure of a helium gas cylinder is 29.7 atm. After several balloons have been blown up the pressure is decreased to 5.68 atm. What fraction of the original gas remains in the cylinder?
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