Sunscreen protects your skin from sunburn. for sunscreen to be effective, it must block or absorb a. x rays. b. visible light. c. infrared light. d. ultraviolet light.

Abookcase has a mass of 38 kg and the coefficient of friction between it and the floor is 0.82 what is the maximum force of friction between the bookcase and the floor a 372n b 305n c 412n d 449n

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87

Your friend increases her force on the desk by 30n . she doesn't change the direction of her push . what happens to the net force on the desk .will the desk accelerate