A muscle builder holds the ends of a masslessrope. At the

center of the rope, a 15kg ball is hung. What is the tension in the

rope if the angle is4.5degrees?

Summarize kirchoff's laws in your own words

A hummingbird is hovering motionless beside a flower. The blur of its wings shows that they are rapidly beating up and down. If the air pushes upward on the bird with a force of 0.

a 45kg box of books is lifted o a bookself 1.75 m above the floor. how much work was done to lift the books?

Suppose someone gives you an alloy that is made of both zinc and nickel. In general, how do you think the physical properties of the alloy would be similar to or different from those of the individual metals?

Is there a sound loud enough to kill a person?

A 29 foot ladder leans against a building so that the angle between the ground and the ladder is 75 ∘. How high does the ladder reach up the side of the building? Round to 2 decimal places.

What is a difference between an isotope and a ion

2. An airplane travels 335 miles in 45 minutes. How fast does it travel? How fast is that in km/hr?

A falling skydiver opens his parachute. A short time later, the weight of the skydiver-parachute system and the drag force exerted on the system are equal in magnitude.

Consider the expression below. Assume m is an integer. 6m (2m + 18) Enter an expression in the box that uses the variable m and makes the equation true. (Simplify your answer completely. If no expression exists, enter DNE.)