Which illusion or test was most difficult for you to perceive correctly? Why do you think this particular illusion was so challenging for you?

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

Multiply or divide to make this english distance conversion. 174 inches = feet (14.5, 58, 2,088, 23)

What is a subatomic particle with a negative charge and very little mass?