Alab cart is given a push upward along a low-friction track. the initial speed of the cart is 4.0 m/s. if the acceleration is -3.0 m/s^2, calculate the time until the instantaneous velocity is zero and calculate the maximum displacement from the starting point.

Aresistor with an unknown resistance is connected in parallel to a 9 ω resistor. when both resistors are connected in parallel to an emf source of 21 v, the current through the unknown resistor is measured with an ammeter to be 4 a. what is the resistance of the unknown resistor? answer in units of ω.

Why are nonmetals more likely to react with eachother by sharing electrons

Elements in group viiia (also known as group 18, or the noble gases) have similar properties because they all have a. the same number of electron shells b. full octets c. the same number of valence electrons d. the same number of electrons needed to fill their octet