What is the name of the element with 83 protons and 80 electrons?

Stars are made in which of the following Nebulas Black holes Dark matter

A carbon atom can form 4 covalent bonds how many valence electrons does a carbon atom have?

Electricity is the flow of?

What is the current running through resistor five?

What contributes to the lethargic feeling when riding in a car for long periods of time? Could inertia play into it? Looking for the scientific explanation of how movement affects the body.

Consider two planets in space that gravitationally attract each other if the mass of one of them stays the same and the mass of the other is doubled AND the distance between them is doubled, then the force between them changes by what factor? A.

David delivers meals to elderly people once a week. He uses a cart to move the meals. The cart has four smooth wheels. Which type of friction acts between the cart wheels and the sidewalk? A. sliding friction B. rolling friction C. fluid friction D.

Current flows through a resistor; (a) with no direction since it is not a vector (b) from any potential to any different potential (c) from high potential to low potential (d) from low potential to high potential (e) cannot be determined

A concave mirror has a focal length of 11 cm. What is its radius of curvature?

Assume each tick mark represents 1 cm. Calculate the total displacement from 0 if an object moves 3 cm to the left, then 7 cm to the right, and then 6 cm to the left. The object moves cm to the left. What is the total distance the object travels? cm