Show:
Properties of Matter
Motion
Newton's Laws and Forces
mechanical Energy
Universe
100
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
100
Explain what an acceleration of 21 m/s/s means.
The speed increases 21 m/s every second.
100
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
100
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
100
List at least 3 characteristics of the universe in the first second after The Big Bang.
very hot, very dense, violent, speck of pure energy, expanding rapidly
200
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.
200
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
200
Describe Newton's First Law with a) velocity b) forces c) acceleration Describe Newton's Second Law with d) velocity e) forces f) acceleration
a) velocity is constant or 0 m/s b) forces are balanced c) acc=0 m/s/s d) velocity is changing (increasing or decreasing) e) forces are not balanced f) acceleration is not 0m/s/s (but can be constant)
200
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
200
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
300
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 volume 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
300
If the equation of a line is Position=16m/s*time+4m where will the car be after 6 seconds?
100 m
300
a) What is the mass of a 852.6 N man? b) Calculate the man's momentum if he is running at 3.600 m/s.
a) 87 kg b) 313.2 kgm/s
300
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.
3.16 J
300
Explain what Hubble's Law tells us about the universe.
The universe is expanding and galaxies further away are moving away faster.
400
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.
400
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
400
Describe Newton's Third Law.
The forces between 2 objects are equal but in opposite directions and happen at the same time.
400
Calculate the kinetic energy of a 16 kg rock rolling with a velocity of 12 m/s.
1152 J
400
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
500
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.
500
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
500
A 5000 N piano is lifted by a crane with a chain with a force of 6500N. Calculate the piano’s acceleration.
2.94 m/s/s
500
What is the velocity of a 36 kg dog running with 648 J of kinetic energy?
6 m/s
500
Place the following events in the correct order: a) water from comets and asteroids 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 from comets and asteroids filled our oceans