Problem: Article: This experiment will allow you to create a light pinhole, which will show you how light travels in a straight line by filtering it through a hole. To create a light pinhole, you will need the following supplies: Three index cards. A piece of modeling clay or sticky tack. You can also use double sided tape. A flashlight or a laser pointer. A hole puncher. A ruler. To do this without any excessive measuring, use the ruler to draw two diagonal lines on an index card that connect the opposite corners of the card. Repeat this for the other two cards. Take the hole puncher and punch a hole at the center of the card where the two lines intersect. Do this for the other two cards. The cards need to stand vertically, at equal distance from each other, and in a straight line for this experiment to work. Form a stand for the cards using the clay so the cards are straight and upright. Use the ruler to ensure the cards are two to five inches from each other. You can also use double sided tape to attach the cards to a surface in a vertical position. Do not cover or obstruct the hole in the center of the cards with modeling clay or tape. Hold the flashlight in your hand so it hits the center of the hole in the first card. Turn on the flashlight or the laser pointer. Note that the light can be seen through all the holes. You should be able to see the light go through all the holes and land on a wall or surface beyond the last index card. You will note that the light does not travel beyond the card. This illustrates that light will travel in a straight line when it hits a non reflective material like the index card.
Summary: Gather your materials. Punch a hole in the center of the index cards. Use the modeling clay to stand up the cards. Position the flashlight or the laser pointer at one end of the row of cards. Move the flashlight or laser pointer so it does not hit the center of the first card.

Problem: Article: The great thing about tug of war is that you can learn how to win as a team, even if you don't have the strongest people on your side! For organized leagues, you might also want to recruit 1-2 extra people as alternates in case someone gets hurt or has to miss a match. If you're planning to play in a league, make sure the combined weight of the people on your team is less than the stated rules, which can vary depending on the age group. This person will act as the "leader" of the group. Choose someone who is a medium height for the team and has played tug of war before. This person should be able to keep a good grip on the rope while in a squatting position and have a lot of lower body strength to keep the front of the line from becoming too strained. It might be helpful to have the teammates stand from tallest to shortest and then pick one of the people close to the middle to be the lead tugger. Position a less experienced member in between 2 more experienced members of the team so they can communicate throughout the game. That way, the knowledgeable teammates can set the pace of the tug and less experienced teammates can work on building up endurance and strength. Talking and communicating throughout the game can be helpful for some members, but remember not to give away your strategy to the other team! Choose someone with good lower body strength and put them at the end of the rope so they can "anchor" the team. Make sure they're strong enough to continually pull the team back while maintaining a tight grip on the rope. In general, the anchor normally wraps the rope around their back and keeps the team moving backward. Normally, the anchor will set the pace for the tugging by taking a step back every 3-4 seconds. If the rest of the team can't keep up, it's up to the anchor to keep their grip and slow down so the rest of the team can reposition themselves.
Summary: Gather 8 people of varying sizes and strength levels. Place a more experienced team member at the front to lead the tug. Stagger the middle teammates based on their skills to encourage teamwork. Position someone with good endurance at the back of the team.

Problem: Article: You'll need to be able to share the movie's audio during your Skype movie party, but Skype won't be able to capture the sound if you just play it off of your computer. Instead, you'll need to download a third-party audio software, like the free Virtual Audio Cable, then set it to be your default output or playback device. This will enable you and your friends to enjoy the movie's visual and audio at the same time. You should also navigate to the Properties page of your new cable output device and set it as the device you'll listen to. This will allow you to hear the movie as well. On Skype, go to your Movie Party group and click on the camera icon. This will start a video call with all of the contacts in your group. Wait until everyone is on Skype to proceed with watching the movie. To tell if your friends are online and ready to start the movie, look for a green dot next to their avatar under the Contacts list. You can also chat through your group conversation to make sure everyone's ready to go. Once you're on the call with your friends, put your movie in or bring it up on a streaming website like Netflix. Take your computer's speed and strength into consideration when deciding how to play your movie! If your computer is older, it might not be able to handle streaming a movie and Skyping all at once. You can try a test call first to see how your computer works with both streaming and Skyping. If it's glitchy, ask a friend to try streaming instead. In the lower right hand corner of your Skype window, click the button that shows 2 overlapping screens. This will share your screen with your other friends. Pull up your movie and hit play once everyone's ready. Just like a real movie party, you can talk about the movie as it's playing, or pause the movie and just chat, either through Skype's text chat or over the microphones, if you're using a separate application. Use your movie party as a chance to talk and catch up.
Summary: Download an audio program and configure your computer to share audio over Skype. Call your Movie Party group. Load your DVD into the computer or pull up the movie online. Share your screen once you're ready. Have fun and enjoy the show!

Problem: Article: If you've tried sending your junk mail back via a "Return to Sender" message, and it still keeps turning up in your mailbox, you may need to take a more direct approach to get it to stop. That means you'll need to open the junk mail, so you can sort through the items in each envelope. If you get a lot of junk mail, opening up the envelopes can be an annoying process. You may want to collect it on a weekly basis and open it all in one sitting instead of doing it each day. When it comes to junk mail such as credit card offers and charity donation requests, the companies usually include a return envelope with pre-paid postage, so you can return the credit application, charity donation, or other requested item. After you've opened the mail, set aside all of the return envelopes, so you can correspond with the company without paying for postage. Even if you've sent previous correspondence back "Return to Sender," your name still might not come off the company's mailing list. Making a written request that you stop receiving the mail may be necessary to put an end to the correspondence. Be polite but firm in the note. Don't resort to foul or abusive language. If you're not sure what to write, try something simple like "Please remove me from your mailing list. I do not wish to receive any future offers/solicitations, etc." Make sure to include your name and mailing address on the note because your contact information will not be on the pre-paid return envelope. Because you're using the pre-paid envelope, there's no need to add any postage to the note. You can drop it in any mailbox or leave it for your mail carrier to pick up when he makes the next delivery.
Summary:
Open the envelopes. Gather the pre-paid return envelopes. Write a note. Mail it back.