Cleaning tarnished silver is an example for which of the following.

chemical change

chemical property

physical change

physical property

What is the difference between force and energy

What could be a hypothesis for the question (How does the amount of daylight affect the number of eggs laid by a chicken?)

A very massive object A and a less massive object B move toward each other under the influence of gravity. Which force, if either, is greater

In the absence of friction, an object will

In a swimming race, miho swam the first 50m in42s. she swam the second 50m in40s. what was miho's average speed during the race?

How much would a 100kg man weigh on the surface of the sun where the acceleration is 274 m/s

How much current is in a circuit that includes a 9 - volt battery and a bulb with a resistance of 12 ohms?

Find the current Voltage VD and current ID in the following circuit assuming (a) ideal diode. (b) Constant voltage drop model with Von = 0.75V (c) using the exponential model (I_0=1*10^ (-14)). Verify your results through Multisim simulation

Suppose two stars are located in region a of the h-r diagram shown in the figure below. Star X appears much dimmer that Star Y as seen from Earth. Which Star can be inferred to be nearer to Earth, and how do you know?

A student examining a joint observes collagen-rich connective tissue fibers linking the bones, but finds no synovial cavity. Which structural classification fits the observed joint?