In which of the following situation is work being done?

A car is pushed but does not budge.

A weightlifter holds a barbell over his head.

A wagon is pulled at an angle of 30 degrees to the horizontal.

A swimmer treads water for 15 minutes.

Which of these is a biotic factor? A) topography B) soil C) air D) bacteria

A student standing on the ground next to a tall building throws a ball straight up with a speed of 39.2 m/s. If it takes the ball 4 seconds to reach the same height as the top of the building, how tall is the building?

A motor boat is traveling east with a velocity of 7.3 meters/second. It experiences a current of 0.34 meters/second from the east. Find the resultant velocity of the boat and its direction.

Which is a homogeneous mixture? A air B pizza C jar of mixed nuts D salad dressing

Mary and Chuck each pull at opposite ends of a rope. Chuck is stronger. Who will move backwards? Question 16 options: The rope will move but Mary and Chuck won't Both Mary and Chuck will move forward Chuck will move backwards Mary will move

Who were the 26 or 27 scientists that found the elements on the periodic table?

What particle is used as a beam to treat cancer

Heat engine x has an efficiency of 67%. heat engine y has an efficiency of 82%. which best compares these two heat engines?

How far away is venus from the sun

Absolute differences between each observed mass and the accepted value, divided by the accepted value, multiplied by 100%