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A student calculates the unknown liquid to have a density of 0.87 g/cm^3. If the class average for the density of the liquid was 0.81 g/cm^3, what should the student calculate as the percent error? (Report your answer to one decimal place.)
if you weigh 637N on earth's surface, how much would you weigh on the planet Mars? (Mars has a mass of 6.37x10^23 kg and a radius of 3.43x10^6 m)
A car traveling 56 km/h is 23.0 m from a barrier when the driver slams on the brakes. What was the car's constant deceleration before impact
Two satellites are in circular orbits around a planet that has radius 9.00*10^6 m. One satellite has mass 77.0kg , What is the orbital speed of this second satellite
Two small metallic spheres, each of mass 0.30g, are suspended as pendulums by light strings from a common point, calculate the magnitude of the charge on each sphere
Two 1.8 V. batteries are connected together in series to a bulb whose resistance is 50 ohms. How many electrons leave each battery per minute
The loaded cab of an elevator has a mass of 3.0 x10^3 kg and moves 171 m up the shaft in 23s at constant speed. At what average rate does the force from the cable do work on the cab.
You throw a stone upward from the top of a building at an angle of 25° to the horizontal, How far from the base of the building does the stone land
A rural mail carrier leaves the post office and drives 22 km in a northerly direction. She then drives in a direction 60.0 Deg south of east for 47 km
A beam of unpolarized light in air strikes a flat piece of glass at an angle of incidence 54.2 degrees. what is the index reflection of the glass
A resistance R and a 3.4-H inductance are in series across a 60-Hz ac voltage. The voltage across the resistor is 34 V and the voltage across the inductor is 39 V. Assume that all voltages in this problem are rms voltages. (a) What is the resistance ..
Suppose there are two concentric thin walled conducting spheres, the inner one of radius 10 cm and the outer one of radius 12 cm. If the inner one has a charge of 2.2 C and the outer one has -2.2 C, what is the E field at a point 11 cm from the ce..
A stream of protons and electrons are shot horizontally (from the left edge of the page to the right) with a speed of 1.2 x 10^6 m/s, What is the radius of the curvature and the direction for the curvature that each of these particles undergoes
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