A 70 kg boy is sitting 3 m from the ground in a tree. What is his potential energy?

When describing down syndrome, it's important to note that a. it can be classified as a single-gene disorder b. it is caused when red blood cells cannot properly form hemoglobin c. it causes infected males to have low testosterone levels d. it is usually caused by three copies of chromosome 21 select the best answer from the choices provided. a b

Which sound characteristic is not affected by the relative motion of an object

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up