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

If a mile of 24-gauge copper wire has a resistance of 0.14 kΩ and the resistivity of copper is 1.7 * 10-8 Ω ⋅ m, what is the diameter of the wire? (1 mile = 1.6 km)

What are two types of charges that particles possess

A helium-filled balloon is launched when the temperature at ground level is 27.8°c and the barometer reads 752 mmhg. if the balloon's volume at launch is 9.47 * 10^{4} 4 l, what is the volume in liters at a height of 36 km, where the pressure is 73.

A car engine applies a force of 65 kN how much work is done by the engine as it pushed a car distance of 75m?

Types of mechanical waves include transverse waves. longitudinal waves. surface waves. all of the above.

What element has the lowest electronegavity?

Identify two different ways you can make a yellow spotlight for a theater stage

Ian walks 2 km to his best friend's house, then walks 0.5 km to the library. He then makes a 2.5 km walk home. The entire walk took him 3 hours. What is his average speed in km/h? SHOW YOUR WORK!

What would happen if earth gravity suddenly disappeared?

How many layers of material were the roads made of? a. two c. four b. three d. five