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
As the block is sliding on the cart,
which object has the larger net
force on it?
1.the cart
2.the block
3.neither; the net force is the same
4.impossible to determine
3
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The fact that the Earth has moved along its orbit in the time it took to rotate once is the reason for
A) the position of the Celestial Equator. B) precession. C) the difference between solar and sidereal time. D) Earth's 23.5-degree tilt. E) seasons.
Of all the stars in the sky, Barnard's star, the next closest beyond Alpha Centauri, appears to move the fastest
Indicate whether the statement is true or false
A 1500-W heater is connected to a 120-V line. How much heat energy does it produce in 2.0 hours?
A) 1.5 kJ B) 3.0 kJ C) 0.18 MJ D) 11 MJ E) 18 MJ
Redshift surveys are designed to find which galaxies are oldest and youngest
Indicate whether the statement is true or false