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Suppose a spacecraft is sent to study an object somewhere in our Milky Way galaxy. This spacecraft finds out that the object has a radius of 25,559 km and a mass of 8.6810 x 1025 kg. Assuming the object is a sphere, what is the density (g/cm3) of this object?
A 238 kg cast-iron car engine contains water as a coolant. Suppose the engine's tempera- ture is 33C when it is shut off and the air temperature is 8C. What mass of water is used to cool the engine
Oxygen (O2) has a molar mass of 32.0g/mol. What is its average translational kinetic energy at that speed
Someone is pulling a suitcase through an airport at constant speed. The handle of the suitcase makes an angle of 55 degree with the horizontal. what is the pulling force being exerted by the person parallel to the handle
A leather ball of circumference 75.1 cm and mass 583 g is forced to the bottom of a swimming pool and then released. Calculate the buoyant force on the ball
Two ice skaters, with masses of 50.0 kg and 85.0 kg, are at the center of a 60.0 m-diameter circular rink. how long does the lighter skater take to reach the edge
A charge +Q0 is distributed uniformly througout a non- conductiong sphere of radius R0 the sphere also has a point charge -q0 at its center. a) what is the electric field outside of the sphere at a distance r from the sphere center? b) what is the el..
a satellite would have a mass of 200 kg on the surface of the moon. determine the weight of the satellite in pounds
A river of width L moves uniformly with speed v.A canoe is to be paddled at a constant speed c with respect to the river. what is the round trip time
Automobile Airbags. The human body can survive an acceleration trauma incident (sudden stop) if the magnitude of acceleration is less than 250m/s2.
Light of wavelength 5.60 multiply.gif 102 nm passes through a slit of width 0.180 mm. Determine the width of the first-order bright fringe
The sun has a mass of 1.99 x 10^30 kg and is moving in a circularorbit about the center of our galaxy, the Milky Way. Determine the tangential speed of the sun
You heat a 507 cm3 sample of a substance from 131 °C to 265 °C, Calculate the coefficient of volume expansion of this substance
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