Isaac Newton was able to estimate a value for G, the universal gravitational constant, from the following data: the radius of the Earth is about 6 400 km, the average density of rocks is about 5.50 g/cm3, and g = 9.80 m/s2 near the surface of the Earth. What value did Newton obtain for G?


6.65 × 10^-11 N×m2/kg2

Physics & Space Science

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Fill in the blank(s) with correct word

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A 500?g block traveling at 60 cm/s slides onto a 1?kg cart as shown. The block stops sliding before reaching the end of the cart

The final speed of the cart is closest to:

1.0 2.10 cm/s 3.20 cm/s 4.30 cm/s 5.40 cm/s 6.50 cm/s 7.60 cm/s 8.impossible to determine

Physics & Space Science

A flat coil of wire is placed in a uniform magnetic field that is in the y direction. The magnetic flux through the coil is a maximum if the plane of the coil is: (More than one answer may be correct.)

1.in the xy plane 2.in the yz plane 3.in the xz plane 4.in any orientation, because it is a constant

Physics & Space Science