Arrange the following atoms in order of increasing ionization energy: Li, K, C, and N.

Un neurochirurgo ordina una puntura lombare per un paziente. In quale cavità del corpo verrà inserito l'ago? a. Ventrale, b. Toracico, c. Dorsale, d. Cranio, e. Pelvico.

Suppose that the input is 3 4 6 7 2 -1. What is the output of the following code?

int num; int sum; cin >> sum; num = sum; while (num != -1) { cin >> num; sum = sum + 2 * num; } cout << "Sum = " << sum << endl;

An aluminum rod is clamped one-fourth of the way along its length and set into longitudinal vibration by a variable-frequency driving source. The lowest frequency that produces resonance is 4400 Hz. The speed of sound in an aluminum rod is 5100 m/s. Determine the length of the rod.