Why does a solid change to liquid when heat is added

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

Using the given data table, calculate the acceleration of the skateboarder. you can use either form of the equation below?

Determine the maximum r-value of the polar equation r =3+3 cos 0