Show:
Properties of Matter
Motion
Newton's Laws and Forces
Energy and Earth
Universe
100
List two ways to find the volume of an object.
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
What happens to an astronauts a) mass and b) weight as she travels from the earth to the moon?
a) The mass is the same but b) the weight will decrease because the moon has less gravity.
100
How much work is done when a 500 N boy carries a 0.85 N ball across a field for 38 m?
0 J
100
Explain what the Big Bang Theory says the universe was like in the first second.
very hot, very dense, violent, speck of pure energy, expanding rapidly
200
Explain what happens to the amount of matter in a log when it is burned.
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.
200
Write an equation of the line for a Position depends on Time graph 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.
a) velocity is constant or 0 m/s b) forces are balanced c) acc=0 m/s/s
200
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?
34 J
300
Describe how to find the mass of a liquid in a lab when you are trying to find its density.
Put a container on the scale and zero the scale. Pour the liquid in and read the mass. (Subtraction method is correct also.)
300
If the equation of a line is Position=16m/s*time+4m where will the car be after 6 seconds?
100 m
300
Describe Newton's Second Law with a) velocity b) forces c) acceleration.
a) velocity is changing b) forces are not balanced c) acc is not 0 m/s/s
300
What is happening on the main sequence of the H-R diagram?
Hydrogen is fusing (burning) to make Helium and producing energy.
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
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?
4.5 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
The equation of a line is Position=6m/s*time-22m Describe the motion of the car including information about the starting position, direction and speed.
The car started at 22 m on the negative side and traveled in the positive direction at a speed of 6 m/s.
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
a) What determines what a main sequence star will become next? b) List 2 possibilities.
a) The mass of the star on the main sequence. b) Super Giants or Giants