Aman attempts to push a 19.8 kg crate across a warehouse floor. he slowly increases the force until the crate starts to move at a force of 34.8 n. he then maintains this 34.8 n force while the box accelerates at 0.357 m/s^2. what is the coefficient of static friction between the crate and the floor?

These models show the electron structures of two different nonmetal elements. which element is likely more reactive, and why? element 1 is more reactive because it has fewer electron shells and is toward the top of its group on the periodic table. element 1 is more reactive because it has more electrons in its valence shell and is farther to the right on the periodic table. element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons. element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.