What is the pooled variance for the following two samples?

sample 1: n=8 and ss=168

sample 2: n=6 and ss=120

a. 24

b. 20.57

c. square root 7

d. 7

A wrench is used to tighten a spark plug. If the wrench handle is 0.20m and a force of 20N is applied, what is the torque applied? A) 0.01 Nm B) 0.4 Nm C) 4 Nm D) 10 Nm

What must you do before you make a hypothesis? a) Run the experiment b) Research information about your question. c) Form a theory. d) Draw conclusions

What is a scientific theory

a 2.4*10^2 N force is pulling an 85 kg refrigerator across a horizontal surface. the force acts at an angle of 20.0 above the surface. the coefficient of kinetic friction is. 200, and the refrigerator moves a distance of 8.00 m.

An air-filled parallel plate capacitor has circular plates with radius r=20.0 cm, separated distance 4.00 mm. The capacitor is connected to 70.0 V battery. a) Find the capacitance, Co, and the charge on the plates, Qo.

What is the difference between a meteorite and a asteroid?

Which of the following best explains why a magnet sticks to a refrigerator? the magnet is

If the truck has a mass of 4,000 kilograms, what is its momentum? Express your answer in kg x m/s

Using diagram differentiate between solenoid and a toroid

If a gas has a gage pressure of 156 kPa, its absolute pressure is approximately