Exams & Certification

What is the decimal equivalent of 20/9 The Correct Answer and Explanation is: The correct answer is A. 2.2̅. To determine the decimal equivalent of the fraction 20/9, you need to perform the division of the numerator (20) by the denominator (9). This process reveals the decimal value. We can solve this using long division: At this […]

Describe two methods to convert 9/20 to a decimal. The Correct Answer and Explanation is: To convert the fraction 920\frac{9}{20}209​ into a decimal, two common methods can be employed: long division and multiplying by the reciprocal. 1. Long Division Method The long division method is the most straightforward approach. Here’s the step-by-step process: The result

The density of gold is 19.3 g/ml. what is gold’s density in decigrams per liter? The Correct Answer and Explanation is: To convert the density of gold from grams per milliliter (g/ml) to decigrams per liter (dg/L), we need to follow a series of unit conversions. Step 1: Understand the conversion factors Step 2: Convert

What is the mass of 256 molecules of glucose, C6 H12 O6 The Correct Answer and Explanation is: The correct answer is None of the other choices. To determine the mass of a specific number of molecules, we must use two key concepts in chemistry: Avogadro’s number and molar mass. Avogadro’s number, which is approximately 6.022

Projectile Motion Lab Continued… (phet.colorado.edu, click the Physics link, and then run the Projectile Motion lab) Please write or type your data, calculations, and answers. Q6) Earlier I claimed that it didn’t matter which object you used as a projectile, but that seems unlikely since we know that heavier objects will fall faster than lighter

Projectile Motion Lab (phet.colorado.edu, click the Physics link, and then run the Projectile Motion lab) Please write or type your data, calculations, and answers. Background Any object moving without a source of propulsion is a projectile, typically something thrown or fired into the air. Neglecting air resistance (also known as “drag”), a projectile near the

Joe checked his display in his car and saw that he traveled 97 km in 100 minutes. What is Joe’s average speed in miles per hour? The conversion factor you will need for this question is: 1 mile = 1.60934 km. (Round to the nearest tenth The Correct Answer and Explanation is: To find Joe’s

A billiard ball is given an initial velocity V=5M/Sand makes a direct impact with ball B (e=0.8), calculate the velocity of ball B and the rebound angle after it hits cushion at C (e =0.6). Mass of the balls is 0.4 kg. The Correct Answer and Explanation is: To solve this, we can break it

A billiard ball is given an initial velocity V=5M/S  and makes a direct impact with ball B (e=0.8), calculate the velocity of ball B and the rebound angle after it hits cushion at C (e =0.6). Mass of the balls is 0.4 kg. The Correct Answer and Explanation is: Correct Answer The velocity of ball B

A billiard ball moving at 5m/s strikes a stationary ball of the same mass. After the collision, the first ball moves at 4.33m/s at an angle of 30 with respect to the original line of motion. Assuming an elastic collision (and ignoring friction and rotational motion), a) Find the struck ball’s speed magnitude and direction.