I will mark brainlist If a wave’s amplitude is 2cm, then its height is equal to:

5 cm.

0 cm

4 cm.

2 cm

Astudent pushes on a 20.0 kg box with a force of 50 n at an angle of 30° below the horizontal. the box accelerates at a rate of 0.5 m/s2 across a horizontal floor. what is the value of the normal force on the box? 200 n 243 n 156 n 225 n