Explain why a sewing needle can float on the surface a water in a glass

Which equation is used to calculate the weight of an object on a planet?

A spherical soap bubble with a surface-tension of 0.005 lbf/ft is expanded from a diameter of 0.5 in to 3.0 in. How much work, in Btu, is required to expand this bubble

Scientific endeavor can sometimes cause potentially harmful results.

After walking across a carpet, a boy feels a spark between his hand and a doorknob. If the boy's hand is negatively charged just before he touches the doorknob, which particles moved from the carpet to his hand (Chose one of the answers below) A

What TA makes something a good insulator?

An object with a mass of 10.9 kg experiences a force of 18.53 N. What is the acceleration of the object? A. 2.2 m/s2 B. 1.7 m/s2 C. 16.83 m/s2 D. 1.3 m/s2

A proton, starting from rest, accelerates through a potential difference of 1.0 kV and then moves into a magnetic field of 0.040 T at a right angle to the field. What is the radius of the proton's resulting orbit

Which of the following terms are needed to completely describe speed? Check all that apply. A. Units B. Direction C. Number D. Mass

Drivers are able to see objects ahead of them because light travels through windshields.

How are trade winds affected by the coriolis effect