Acrate is lifted vertically 1.5 m and then held at rest. the crate has weight 100 n (i. e., it is supported by an upward force of 100 n). how much work is being done to hold the crate 1.5 m above the ground in this way? 1. 150 j 2. more than 150 j 3. none of these 4. a bit less than 150 j 5. no work is being done.

A30 kg weight lies on top of a massless piston of area a = 0.01 m2 the exterior air is at a (constant) p =1 atm and t = 27 c. the interior gas is 0.4 moles of (ideal) n2 and it has initial temperature 27.00 degrees c. 1. what is the initial pressure in the interior? a. 29.4 kpa b. 130.7 kpa c. 101.3 kpa the next three questions concern what happens when an amount of heat q is slowly added to the interior, raising the piston by 1 mm and raising the interior temperature to 27.40 c

Apersons beliefs and general outlook, which act like filters on the information they receive are called ?

3. a lunar exploration vehicle was created by a research team. it weighs 3,000 kg on the earth. it needs an acceleration of 10 m/s2 on the moon. in order to have the same acceleration, what will be the net force acting on the vehicle on the earth?