Happy day after a snow day!
Complete these problems on the conservation of momentum. This is just like the lab you did on Monday. Remember to include the mass of the cart when you do your calculations. You don’t need to screenshot the page, just show me page when you are done.
On this day, 130 years ago, Edwin Hubble was born in Marshfield, Missouri. Hubble is thought to be one of the greatest astronomers of all time. From NASA.gov:
Most astronomers of Hubble’s day thought that all of the universe — the planets, the stars seen with the naked eye and with powerful telescopes, and fuzzy objects called nebulae — was contained within the Milky Way galaxy. Our galaxy, it was thought, was synonymous with the universe.
In 1923 Hubble trained the Hooker telescope on a hazy patch of sky called the Andromeda Nebula. He found that it contained stars just like the ones in our galaxy, only dimmer. One star he saw was a Cepheid variable, a type 
of star with a known, varying brightness that can be used to measure distances. From this Hubble deduced that the Andromeda Nebula was not a nearby star cluster but rather an entire other galaxy, now called the Andromeda galaxy.
In the following years, he made similar discoveries with other nebulae. By the end of the 1920s, most astronomers were convinced that our Milky Way galaxy was but one of millions in the universe. This was a shift in thought as profound as understanding the world was round and that it revolved around the sun.
Hubble then went one step further. By the end of that decade, he had discovered enough galaxies to compare to each other. He created a system for classifying galaxies into ellipticals, spirals and barred spirals — a system called the Hubble tuning fork diagram, used today in an evolved form.
But the most astonishing discovery Hubble made resulted from his study of the spectra of 46 galaxies, and in particular of the Doppler velocities of those galaxies relative to our own Milky Way galaxy. What Hubble found was that the farther apart galaxies are from each other, the faster they move away from each other. Based on this observation, Hubble concluded that the universe expands uniformly. Several scientists had also posed this theory based on Einstein’s General Relativity, but Hubble’s data, published in 1929, helped convince the scientific community.
In honor of this great physicist, you are going to do some physics! YAAYY!!! Try these
Happy Monday!!
As we are getting ready to wrap up this energy unit, try these delicious PhyiscsAviaries related to energy, work, and power. You don’t need to take screenshots, just call me over when you’re done.
Remember our equations for this unit:
Eg = mgh
Ek = 1/2 mv2
Ee = 1/2 k x2
W = ΔE = Force x Distance
Power = work / time = ΔE / time
Hello. I’m not here today. But you apparently are. Thanks for coming in!
You can work with a partner to complete the tasks in this document.
Serving up some delicious @PhysicsSoup.
Complete these scrumptious PhysicsAviaries with your partner.
You’ll be working with a partner to answer these questions. Call me over when you’re done.
With your (almost) birthday buddy try these two problems. You don’t need to screenshot it, just call me over and show me.
