Help in the missing lines please

Indicate whether the specified alkyl halides will form primarily substitution products, only elimination products, both substitution and elimination products, or no products when they react with sodium methoxide. 1-bromobutane 1-bromo-2-methylpropane 2-bromobutane 2-bromo-2-methylpropane

Which of the following will cause an increase in the acceleration of an object? increase force decrease force increase mass decrease mass

Aracehorse with a kinetic energy of 78,750 j is clocked at 17 m/s when it crosses the finish line. what is the horse's mass?