A question is scientific if you can answer it using which of the following?

O A. A survey of other scientists

O B. Thoughts and feelings

C. Observations and measurements

D. A survey of nonscientists

Draw a burette filled with water to a volume of 28 cm³

1.) Write the correct coefficient for K (OH) in the box when the equation is balanced. _Al2 (SO4) 3 (aq) + __K (OH) (aq) → _Al (OH) 3 (aq) + _K2 (SO4) (aq) 2.) When Ca (OH) 2 reacts with HNO3 we get H (OH) and Ca (NO3) and Ca (No3) 2 as products 3.

Explain how newton's third law of motion and his law of universal gravitation are connected?

How does friction affect brick structures

A turntable must spin at 33.4 rpm (3.50 rad/s) to play an old-fashioned vinyl record. how much torque must the motor deliver if the turntable is to reach its final angular speed in 1.

Which method is used to counteract the effects of erosion caused by water

Which law explains a soccer player who kicks a ball with his foot and his toes are left stinging?

While a roofer is working on a roof that slants at 39.0 degrees above the horizontal, he accidentally nudges his 88.0 N toolbox, causing it to start sliding downward, starting from rest. If it starts 4.

Suppose that the centripetal force acting on an object in circular motion were doubled to a new value, and the object remained in a circular path with the same radius. How would the motion be affected?

2. Air at a temperature of 20 ºC passes through a pipe with a constant velocity of 40 m/s. The pipe goes through a heat exchanger in which hot gases outside the pipe heat up the air to 820 ºC.