rēm long vowel?

Latin Learning Latin
1

From Morwood’s Latin Grammar, pg. 8

bonī est rēm pūblicam cōnseruāre.
It is characteristic of a good man to look after the state.

Is rem the singular accusative of 5th declension feminine rēs? On pg. 17 the singular accusative of rēs is given with a short vowel, making me unsure.

2

Short.

3

Thank you. I’ll contact Morwood about the typo.

4

Terrible news, but I’ve afraid that James Morwood passed away about a year ago, only a month after I corresponded with him last. I’ll post a thread on the Open Board with some links to his biography.