Category: Physics

What does potassium 40 40K break down into? calcium-40 What percentage of potassium-40 remains after 3 half-lives? 12.5% What percentage of potassium-40 remains after 1 half lives? Potassium-40 (40K) is a radioactive isotope of potassium which has a long half-life of 1.251×109 years. It makes up 0.012% (120 ppm) of the total amount of potassium […]

What are 3 disadvantages of wind energy? Various Disadvantages of Wind Energy The wind is inconsistent. Wind turbines involve high upfront capital investment. Wind turbines have a visual impact. May reduce the local bird population. Wind turbines are prone to noise disturbances. Installation can take up a significant portion of land. Wind turbines can be […]

Is the NFPA 704 symbol required? A: The NFPA 704 standard is a voluntary standard. NFPA 704 signs are required when another federal, state or local regulation or code requires their use. Some of the more widely adopted and used NFPA codes that require 704 signs for specific occupancies, storage and hazardous materials include: NFPA […]

How heavy should my bat be? Choosing the Correct Weight Youth Bat: Weigh Him/Her In general: Children under 60 pounds should swing a bat between 26 and 29 inches long. Children weighing more than 70 pounds should swing a bat ranging from 28 to 32 inches long. What size bat should a 10 year old […]

Who is the killer woman in bathroom? A woman is murdered in the restroom riddle answer So, only the female diner who is sitting at table number 3 can enter that restroom. Moreover, if you look at her plate, you will notice that it is completely empty. Quite obviously, the diner at table number 3 […]

Can I get visa on arrival in Jordan? Visa can be obtained upon arrival. You will need to get in contact with the closest Jordanian Embassy in order to obtain a visa before you arrive. Visa can be obtained upon arrival, it will cost a total of 40 JOD. Visa can be obtained upon arrival, […]

What is the net worth of Kristy McNichol? Kristy McNichol Net Worth: Kristy McNichol is an American singer and actress who has a net worth of $4 million. Born in Los Angeles, California, in 1962, Christina Ann McNichol made her TV acting debut in a 1973 episode of “Love, American Style”. Who is Kristy Nichols […]

What force is required to lift a 50 N load with this pulley system? 1. What is the minimum force required to lift a 50-N load with one fixed pulley? . The minimum force required would be 50 N 2. In what places have you seen pulleys at work? Examples of pulleys include: Elevators use […]

What are the 12 Roman laws? The Twelve Tables (aka Law of the Twelve Tables) was a set of laws inscribed on 12 bronze tablets created in ancient Rome in 451 and 450 BCE. They were the beginning of a new approach to laws which were now passed by government and written down so that […]

Can unmarked police cars give speeding tickets? Technically, yes – you could receive a notice of intended prosecution through the post in the end way you could if you popped a speed camera… But as a police officer than regularly drives an unmarked vehicle and on occasion will do this – you almost certainly won’t. […]