An experiment is designed to determine if the amount of sugar in a drink affects the likelihood that bees will be attracted to it. sample a is 100 ml of pure water. sample b is 100 ml of water with 1 gram of sugar dissolved in it. sample c is 100 ml of water with 2 grams of sugar dissolved in it.

all samples are placed on a picnic table. one observer is assigned to each drink. the observers count the number of bees that visit the drink during a 15-minute interval.

which of the following is the best hypothesis for this experiment?

1 if the amount of sugar in a drink increases, then the number of bees it attracts will increase.
2 bees prefer drinks with sugar in them.
3 if the temperature during the test increases, then the number of bees visiting the drinks will increase.

For problems 1-3, consider a simple dc brush motor with a permanent magnet stator. with an an consider a simple dc brush motor with a permanent magnet ae supply voltage of 100 v, the no-load speed of the motor is 1000 rpm. this motor can provide a torque of 1.9 n-m at 800 rpm drawing a current of 2 a current are both zero at no load.) 1. with an armature supply voltage of 100 v, the motor is operated at 900 rpm. what is the motor torque? what is the mechanical power delivered by the motor? what is the current draw? what is the electrical power input? what is the energy efficiency of the motor? with an armature supply voltage of 100 v, the motor is operated at 1100 rpm (where it acts as a generator). what torque input is required? what mechanical power is required what current is generated? what is the electrical power generated? what is the energy efficiency of the motor acting as a generator? 2. with an armature supply voltage raised to 120 v, the motor is operated at 1000 rpm. what is the no-load speed? what is the motor torque? what is the mechanical power delivered by the motor? what is the current draw? what is the electrical power input what is the energy efficiency of the motor? 3.

In automobile steering wheel is shown what is the ideal mechanical advantage blank? if the ama is eight what is the efficiency of the steering wheel?

You are given two vectors a⃗ =−3.00ι^ 5.00j^ and b⃗ =5.00ι^ 2.00j^. let the counterclockwise angles be positive.