Which element could not form in the sun and would have to be formed in a supernova?

hydrogen (atomic number 1)

helium (atomic number 2)

oxygen (atomic number 8)

uranium (atomic number 92)

Aballet student who learns with the of his instructor is demonstrating learning.

Aparticle initially moving east with a speed of 20.0 m/s, experiences an acceleration of 3.95 m/s, north for a time of 8.00 s. what was the speed of the particle after this acceleration, in units of m/s? give the answer as a positive number.

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?