Properties of Matter
List two ways to find the volume of an object in a lab when you are trying to find the density.
Displacement using a graduated cylinder and water and measuring with a ruler and using a formula
Explain what an acceleration of 21 m/s/s means.
The speed increases 21 m/s every second.
An astronaut has a mass of 75 kg on the earth. The acceleration due to gravity on the moon is 1.63 m/s/s.
a) What is her mass on the moon?
b) What is her weight on the moon?
a) 75 kg
b) 122 N
How much work is done:
a) when a 500 N boy carries a 0.85 N ball 38 m?
b) if a car stops in 30 m by applying 600 N of force?
c) when you push a 20,000N car with 250 N of force and it doesn't move?
a) 0 J
b) 18,000J
c) 0 J
a) List 3 characteristics of the universe in the first second after The Big Bang.
b) Explain what Hubble's Law tells us about the universe.
a) very hot, very dense, violent, speck of pure energy, expanding rapidly
b) The Universe is expanding and galaxies further away are moving away faster.
a) Explain what happens to the amount of matter in a log when it is burned.
b) Two clay balls are of equal size, shape and weight. One is flattened. What happens to the mass, weight and area?
a) The amount of matter doesn't change but some of the matter is transformed into something else - other matter like soot and ash, and energy like heat and light.
b)The mass and weight are the same but the area of the flattened one has been changed.
Write the equation of the line for a Position depends on Time graph for a toy car with a y-intercept of 65 m and a slope of -9 m/s.
position=-9m/s*time+65m
a) If a 0.55 kg ball is dropped with negligible resistance from 6.3 meters with 34 J of PE, how much KE will it have at the bottom of the cliff?
b) What is the amount of work done by friction if PE at the top of a ramp is 8.0 J and the KE at the bottom of the ramp is 3.5 J?
a) 34 J
b) 4.5 J
a) What is happening on the main sequence of the H-R diagram?
b) What could a Main Sequence star become next?
c) What determines which star it becomes next?
a)Hydrogen is fusing (burning) to make Helium and producing energy.
b) Red Giant or Red Supergiant
c) mass
a) Describe how to find the mass of a liquid in a lab when you are trying to find its density.
b) Calculate the density of a 80 gram stone with a volme of 4 cm cubed.
a) Put a container on the scale and zero the scale. Pour the liquid in and read the mass. (Subtraction method is correct also.)
b) 20 g/cm cubed
If the equation of a line is Position=16m/s*time+4m where will the car be after 6 seconds?
100 m
A 0.4000 kg toy truck rolls down a 3.000 meter ramp from a height of 0.8000 meters. Calculate the potential energy of the truck at the top of the ramp.
11.76 J
A. List the following low mass stars in order:
a) Red Giant b) Protostar c) White Dwarf d) Main Sequence e) Nebula
B. What 2 things can high mass red supergiant stars become next?
C. What do high mass stars fuse (make)?
A. e) Nebula, b) Protostar, d) Main Sequence, a) Red Giant, c) White Dwarf
B. Neutron Star and Black Hole
C. All elements heavier than Iron
Gold has a density of 19.3 g/cm^3 and nickel has a density of 7.81 g/cm^3. The two metals have the same mass. Which has a larger volume and why?
Nickel because it has a lower density, there has to be more volume to have the same mass.
The equation of a line is Position=-2m/s*time+40m a) Where did the car start?
b) What direction did the car go in?
c) What was the speed of the car?
a) at 40 m
b) negative (or left)
c) 2 m/s
Calculate the kinetic energy of a 16 kg rock rolling with a velocity of 12 m/s.
1152 J
a) List 3 major characteristics of a Black Hole and
b) explain what happens to something as it is sucked into them..
a) powered by gravity, strong but can only pull in things close to their horizon, they can't be seen directly
b) an object sucked into a black hole will be stretched because gravity closest to the hole is stronger (spaghetification),and have a HUGE weight and HUGE acceleration because of the large gravity
You are given 2 objects with the same mass. When they are lowered into water one object sank and the other object floated. Explain why using density and volume.
The object that floated is less dense than water and has a greater volume than the object that sank. The object that sank is more dense than water and has a smaller volume than the object that floated.
a) If you travel 22 m/s for 12 sec how far did you go?
b) If you travel 544 m in 68 sec what was your average speed?
c) If you run 60 m at 3 m/s how much time did it take?
a) 264 m
b) 8 m/s
c) 20 sec
A 5000 N piano is lifted by a crane with a chain with a force of 6500N.
a) Calculate the piano's mass.
b) Calculate the unbalanced force on the piano.
c) Calculate the piano’s acceleration.
a) 510 kg
b) 1500 N
c) 2.94 m/s/s
What is the velocity of a 36 kg dog running with 648 J of kinetic energy?
6 m/s
Place the following events in the correct order: a) water present in the Nebula when earth formed filled our oceans b) dust particles stuck together because of opposite charges c) the Earth's layers formed because of the different densities of the molten layers d) gravity caused smaller rocks to hit each other, melt and stick together
b) dust particles stuck together because of opposite charges
d) Gravity caused smaller rocks to hit each other, melt and stick together
c) the Earth's layers formed because of the different densities of the molten layers
a) water present in the Nebula when earth formed filled our oceans