Topic 1 = Physical vs. Chemical properties
What is the definition of mass?
the amount of "stuff" or matter that an object contains
What is the difference between a chemical process and a physical process in chemistry?
a chemical process involves the breaking and forming of chemical bonds, leading to the creation of new substances with different properties, while a physical process involves changes in the state or form of a substance without altering its chemical composition.
Are there different types of black holes?
Yes, astronomers have identified three main types of black holes: stellar, supermassive, and intermediate-mass black holes
What is Renewable Energy?
Renewable energy is energy from sources that naturally replenish themselves, like sunlight, wind, water, and the Earth's heat, ensuring a sustainable and endless supply.
How does energy move from one place or object to another, and what are some examples of this movement in everyday life?
Energy moves between objects and locations through various means like moving objects, sound, light, or electrical currents, and these transfers are common in everyday life.
What tools are used to measure it?
rulers, tape measures, calipers, micrometers, and laser distance measurement devices.
When does the breaking of chemical bonds release energy?
Breaking chemical bonds requires energy, not releases it, and energy is released when new chemical bonds are formed
Can momentum be hidden to human eyes like how kinetic energy can be hidden as heat
Yes, momentum can be "hidden" to human eyes, similar to how kinetic energy can be hidden as heat or other forms, particularly in systems involving waves or microscopic motions.
What kind of renewable energy technologies are available in MA?
In Massachusetts, renewable energy technologies include solar, wind, biomass, hydropower, and geothermal energy, with the state also having programs to promote their use and installation.
whats an example of a good emitter/radiator of heat?
A good example of a good emitter/radiator of heat is a black, matte surface because it absorbs and emits thermal radiation more efficiently than other colors or surfaces.
What units are used to measure it?
meter (m) for length, kilogram (kg) for mass, second (s) for time, ampere (A) for electric current, kelvin (K) for temperature, mole (mol) for amount of substance, and candela (cd) for luminous intensity
Why is mass conserved in chemical reactions?
Mass is conserved in chemical reactions because atoms are neither created nor destroyed, but rather rearranged during the reaction
Can you go fast enough to get enough mass to become a black hole?
No, simply traveling at high speeds or increasing the mass of an object will not make it a black hole
What are the Benefits of Renewable Energy Systems?
Renewable energy systems offer numerous benefits, including environmental protection, economic advantages, and energy independence, making them a crucial part of a sustainable future.
in a freezer, how can thermal energy be transferred through the insulating material at a slow rate?
In a freezer, thermal energy transfer through insulation is slowed by using materials with low thermal conductivity, like foam or air, which have poor heat conduction properties, and by creating air gaps or vacuums to further reduce heat transfer.
What is the definition of volume?
Volume, in simple terms, is the amount of three-dimensional space an object or substance occupies
What is matter in the universe made of?
The universe is composed of ordinary matter (atoms, stars, planets), dark matter, and dark energy
How can a material at a certain temperature have all of its molecules at the same energy?
It's not possible for all molecules within a material at a certain temperature to have the exact same energy
Why isn't everyone using Renewable Energy technologies?
While renewable energy offers many benefits, its widespread adoption is hindered by factors like high initial costs, intermittency of some sources, and concerns about grid stability and infrastructure limitations, making fossil fuels still a dominant energy source.
how does radiation work
Radiation therapy uses high-energy particles or waves (like X-rays or gamma rays) to damage or destroy cancer cells by targeting their DNA, preventing them from growing and dividing.
What tools are used to measure it?
tape measures, rulers, calipers, micrometers, laser levels, protractors, squares, angle finders, and pressure gauges
How is matter in the universe organized?
On a large scale, matter in the universe is organized into a "cosmic web" of interconnected structures, primarily consisting of galaxies, galaxy groups, clusters, and superclusters, all linked by filaments of gas and dark matter, with vast, empty regions called voids in between.
What patterns occur in energy transfer and transformation?
Energy transfer and transformation follow patterns of conservation and transformation, where energy moves from one place or form to another, often with some energy being converted to heat.
Can I use wind or solar for my home or business?
Yes, you can use both solar and wind power for your home or business, and they offer different advantages and considerations. Solar panels are more practical for residential areas and are cheaper, while wind turbines are better suited for rural, windy locations and can generate power 24/7.
how does heat get radiated from the heater to the cans??
Heat from a heater to cans is transferred primarily through radiation, where the heater emits infrared electromagnetic waves that travel through the air and are absorbed by the cans, causing them to warm up.