Hey Ray! Understanding The Center Of Gravity
We have discussed gravity in a couple different experiments. This time, I am going to show you something that may seem almost impossible to do.
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We have discussed gravity in a couple different experiments. This time, I am going to show you something that may seem almost impossible to do.
The atmosphere has weight. The near average weight is 14.7 pounds per square inch. That means every square inch of your body, on average, has 14.7 pounds of atmosphere pushing on it.
Shadows are pretty much an everyday or every night occurrence. Since light travels in a straight line, when something gets in the way of that path, it creates an absence of light, or a shadow.
Have you ever had to get an MRI? That is the loud machine with a very powerful magnet that can make images of the inside of your body.
The night sky is full of amazing things during the summer! One thing that peaks in August is the Perseid Meteor Shower, and it can be one of the biggest celestial highlights in the summer.
When people refer to heat lightning, they are usually talking about seeing lightning, but not hearing thunder in the evening or nighttime, usually during the summer months.
Have you ever tried to pour something from one coffee cup into another, only to have the liquid seemingly stick to the side of the cup, resulting in a mess? Meteorologist Ray Petelin explains the science that makes that mess can also help us perform a pretty cool trick!
Smog and air quality issues can happen in our area any time of the year. Meteorologist Ray Petelin shows us how some weather patterns and our daily routines can also make the air quality worse.
If you think about it, water can be kind of weird.
Gravity is the force that attracts things toward other things that have mass.
It may be controversial to say in these parts, but it is ridiculous to use relative humidity as an indicator of comfort.
We all know that in the summer, our cars basically turn into ovens.
Last week, we talked about how light pollution makes it harder, if not impossible to see some amazing things in the night sky.
During the daytime, when you look to the sky you can't see stars, or sometimes planets that you can see at night. While daylight is the obvious reason, at night we may not be able to see some of the good stuff because of different kind of light called light pollution.
This is a fun experiment that is easy to do and requires very little set up. I like to call it the "Invisible Extinguisher," since it puts a candle out by using what seems to be an empty glass.
Sometimes, you look up to the sky, and you see something weird. Other times you look down from up in the sky and you see something extremely weird! That happened to Edna. Pilot's Glory, Glory of the Pilot, or Pilot's Halo — whatever you want to call it, Ray Petelin has an explanation.
A viewer asks, if it's raining outside, but the humidity gauge only reads 74%, shouldn't it be 100%? Ray Petelin has the answer in a new Hey Ray!
The Moon is spherical like Earth, so why do we only see one side of it? Meteorologist Ray Petelin has the answer.
Heavy winds and windstorms have been in the headlines a lot lately, which has plenty of Pittsburghers asking, "Is it windier today than it ever has been in Pittsburgh?" Ray Petelin explains!
Meteorologist Ray Petelin has a weird experiment today where he shows us how to illuminate fluorescent light bulbs without connecting them to a light fixture!
Science can often surprise you! Meteorologist Ray Petelin has a cool inertia experiment where the result may be the opposite of what you think!
It's common to see icicles hanging from roofs or awnings, but can they form sideways? The Barton Family saw just that, and Ray Petelin explains how it may have happened!
When rivers, lakes, and ponds freeze over, it's natural to want to go play on them, but checking them for safety is important. Ray Petelin explains what you need to do to make sure you don't fall through.
When we get large snowfalls, the same question gets asked - why is snow white but when it melts, it's clear? Ray Petelin answers that in a new Hey Ray!
KDKA meteorologist Ray Petelin uses science to debunk some popular conspiracy theories.
The city of Pittsburgh and the Pittsburgh Parks Conservancy broke ground at McKinley Park, marking a major milestone in the park's revitalization.
The Pittsburgh Steelers and Aaron Rodgers have agreed to terms on a one-year contract, according to reports.
Napoleon Solo hustled to first place at the 151st running of the Preakness Stakes on Saturday, coming out on top against 13 other horses.
Cristopher Sánchez struck out a career-high 13 and earned his second career shutout as the Philadelphia Phillies blanked the Pittsburgh Pirates 6-0.
Frontline healthcare workers at Butler Memorial Hospital overwhelmingly approved their first union contract on Friday.
Gambling addiction is impacting more young people, so much so that state lawmakers are calling it an epidemic.
President Trump is in Beijing meeting with China's President Xi Jinping, with the two leaders aiming to stabilize their trading relationship after last year's trade war.
The Allegheny County Health Department wants to require all employers in the county to give their employees paid parental leave.
Live updating West Virginia primary election results for May 12, 2026.
Residents heading to the polls in West Virginia's primary election now must present a valid photo ID in order to vote.
The Allegheny County Health Department has issued a consumer alert for Prantl's Bakery in Shadyside, saying an inspection found pest droppings.
A Bethel Park homeowner says he's out thousands of dollars after hiring a contractor to replace his front porch.
A popular Washington County farm won't be offering pick-your-own peaches this year.
Gas across the country continues to climb.
Two food items sold at Giant Eagle have been voluntarily recalled due to separate contamination risks.
If your current security system is just a dog and a basic lock, it might be time for an upgrade. East End Handyman Company's Patrick McLaren is back on PTL to show us how you can install a security camera.
Team PTL's Daisy Jade is at the CCAC West campus and she's learning more about their annual car show!
Shari Zatman is back for another segment, this time, she's giving us the instructions on how to make a floral graduation cap!
Our friend, Shari Zatman of Perfectly Planned by Shari is here to help you get through graduation season by showing you how to plan the perfect party!
In a world of viral trends, Corrine has been proving that the old Hollywood glamour hasn't gone anyway, it just needed a refresh.
A Bethel Park homeowner says he's out thousands of dollars after hiring a contractor to replace his front porch.
It's been nearly eight years since Rachael DelTondo was shot and killed in the driveway of her parents' home in Aliquippa.
An artist in Pittsburgh said the Steel City clothing company used his artwork without his permission.
Alcosan's multi-billion-dollar construction project to clean up the rivers in southwestern Pennsylvania is already over budget.
Pennsylvania prisons now give suboxone to thousands of inmates, with thousands more on the waiting list.
Frontline healthcare workers at Butler Memorial Hospital overwhelmingly approved their first union contract on Friday.
A western Pennsylvania dad went from wondering what a spot on his leg was to learning he has an extremely rare skin cancer.
The Allegheny County Health Department wants to require all employers in the county to give their employees paid parental leave.
Allegheny Health Network is putting out a warning about a new social media trend.
Workers at Butler Memorial Hospital say they're ready to walk off the job if hospital management doesn't come to terms with them.
The Pittsburgh Steelers and Aaron Rodgers have agreed to terms on a one-year contract, according to reports.
Western Pennsylvania has historically been a hotbed for producing talent that succeeds in the NFL.
Napoleon Solo hustled to first place at the 151st running of the Preakness Stakes on Saturday, coming out on top against 13 other horses.
Cristopher Sánchez struck out a career-high 13 and earned his second career shutout as the Philadelphia Phillies blanked the Pittsburgh Pirates 6-0.
Kyle Schwarber hit his majors-leading 19th and 20th home runs of the season and Philadelphia rallied past Pittsburgh 11-9 in 10 innings.
A popular Washington County farm won't be offering pick-your-own peaches this year.
If you're about to throw out all of those old documents while spring cleaning, there are some you should hold onto.
The hole left behind by Spirit will hit businesses and rental companies within Arnold Palmer Regional Airport.
The bar served its final pints Sunday night after 43 years in Oakland, near the heart of Pitt's campus.
Arnold Palmer Regional Airport officials are confident they'll be able to replace Spirit Airlines after the airline shut down early Saturday morning.
The country music superstar will be performing at 1846 Farms in September.
The exhibit transforms historic industrial and historical paintings into a multi-projection animated experience.
Country music star Lainey Wilson and former Steelers quarterback Devlin "Duck" Hodges tied the knot in a lavish Tennessee wedding.
Riverlife will reopen its free-to-access barge platform, Shore Thing, later this month.
Ten Carnegie Mellon University alumni have snagged nominations for Tony Awards.
Pittsburgh Steelers fans shared something of a mixed reaction to the news of Aaron Rodgers' reported return, but mostly everyone who spoke with KDKA-TV said they expected this outcome. KDKA-TV's Ricky Sayer shares more.
In an effort to provide a vibrant community space, the city of Pittsburgh and the Pittsburgh Parks Conservancy broke ground at McKinley Park, marking a major milestone in the park's revitalization. KDKA-TV’s Jessica Riley shares more.
Stay on top of local weather with meteorologist Trey Fulbright’s forecast!
Watch as teams from Avella, Somerset Area, and Taylor Allderdice high schools compete on this edition of KD Quiz!
Watch as teams from Avella, Somerset Area, and Taylor Allderdice high schools compete on this edition of KD Quiz!
Mike Tomlin stepped down as head coach of the Pittsburgh Steelers after 19 seasons with the team.
Pitt's regular season has ended with an 8-4 record.
Pitt's five-game winning streak came to an end with a 37-15 loss to Notre Dame.
Mason Heintschel set a new Pitt freshman single-game passing record in the Pitt win at Acrisure Stadium.
The 44th annual KDKA-TV Turkey Fund will help our neighbors in need have a nice meal for Thanksgiving.
