Technician A says that the block deck is the surface to which the cylinder head attaches and can be curved. Technician B says that core plugs are used to fill the holes in the block used for casting. Which technician is correct?

A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

What are two different ways you could find the value of a? explain these methods.

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?