Two cars with two different masses are sent down a ramp. The distance each car travels is measured. What is the independent and dependent variable of this experiment?
Independent: mass of cars
Dependent: distance traveled
100
Mike rides a bike at 2 m/s. If his displacement is 10m, how long did he ride? Include units
5 s
t=change in displacement/velocity
t= (10m)/(2m/s)
100
What is the property of an object that resists changes in motion?
Inertia.
100
What is an element. Give an example.
A substance made of one type of atom.
example: carbon
100
What particles are in the nucleus of the atom and what are their charges?
protons and neutrons
protons are positive and neutrons are neutral
200
What are the metric units for mass, length and volume?
Grams, Meters, Liters
200
Jim is paddling 2m/s in a 1m/s current. How long will it take him to travel 30m?
What is 10 seconds
t= (30m)/ (3m/s)
200
A car has a mass of 1000kg. If a net force of 2000N is exerted on the car, what is the acceleration?
2 m/s2
a= (2000N)/(1000kg)
200
Convert 200 degrees Celsius to Fahrenheit.
392 degrees F
200
How are isotopes of an element the same? How are they different?
They are same element so they have the same proton number. They have different atomic mass and different number of neutrons.
300
1 Km = HOW MANY METERS?
1 Km = 1000 m
300
This is the rate at which your velocity changes.
What is acceleration.
300
A ball falls off a cliff and splashes into river 5 s later. What is the final velocity of the ball?
49 m/s
Vf= gt
vf = (9.8 m/s) (5s)
300
What do we call when molecules have the lowest energy they can have? This is the same as 0 What?
Absolute zero which equals 0 Kelvin
300
How many protons, neutrons, and electrons does an atom of Carbon have? What is its mass?
6 protons, 6 electrons, 6 neutrons. It has a mass of 12.
400
An airplane flies 450 m in 3 sec. What is its speed? Include units.
150 m/s
400
A boat moves a 1m/s and then increases its velocity to 4m/s in 3 seconds. Calculate acceleration. Include units
1 m/s2 (1 meter per second squared)
a = (4m/s-1m/s)/3s
400
A ball falls off a cliff. After 5 seconds it has a final velocity of 49m/s. What is the ball's average velocity?
24.5 m/s
Vavg= (0 m/s + 49 m/s)/ 2
400
This is the property that indicates how much heat is needed to raise the temperature of 1 kg of a material by 1 degree Celsius.
Specific heat
400
This is the time it takes for half of the atoms in a sample of a radioactive element sample to decay.
Half life
500
How far will a dog travel if it runs 1 minute at a speed of 5 m/s?
300 m
d=vt
d=(5m/s)(60s)
500
If you know acceleration and change in velocity, how do you solve for time?
time = change in velocity/acceleration
time = (Vf-Vi) / a
500
How much does a 2.5 kg bag of flour weigh on the moon? Moon g=1.6 N/kg
4 Newtons
Fw= mg
500
How much heat is needed to raise the temp of a 250 liter hot tub from 20 to 40 degrees C. Specific heat (Cp) of water is 4184 J/kg degrees C.
20,920,000J
500
Give an example of an element and a compound.
An element is one type of atom for example: carbon
A compound contains elements combined in specific ratios for example: carbon dioxide