KHDUDCM
What is the prefix for one thousand?
kilo
Density is mass divided by what?
volume
Pressure in a fluid increases with what?
depth (or density of fluid)
The upward force that keeps objects afloat is called what?
Buoyant force
The standard unit for temperature is _______ and the standard unit for heat is ______
celsius (or kelvin) AND joule
How many grams are in a hectogram?
100
Which is denser: water or oil?
water
What is the unit of pressure in the SI system?
pascal
An object floats if its density is __ than the fluid density.
less
What additional factors must be known to calculate the amount of heat from a change in temperature?
mass of substance and specific heat capacity of substance
What does the prefix “milli-” represent?
1/1000
An object has a mass of 200 g and a volume of 50 cm³. What is its density?
4 g/cm3
A fluid exerts a pressure of 300 Pa. If the area is 2 m², what is the force?
600 N
A metal cube has a volume of 45 cm3. What volume of water does it displace?
45 cm3
200 g of water is heated by 10 °C. How much heat energy is required for this temperature change? (c water = 4.2 J/g°C
8400 J
Convert 53.2 kilometres into metres.
53,200 metres
If an object has a density greater than 1 g/cm³, will it float or sink in water?
sink
How does depth, density, and gravity combine to calculate fluid pressure? (Write the formula)
P = ⍴gh
A fully submerged metal cube displaces 500 ml of pure water. What is the buoyant force acting on the cube? Take g = 10N/kg
5 N
If 200 J of heat is added to an object with mass 2 kg and specific heat 100 J/kg°C, what is the temperature change?
1 deg C
How many millimeters are in one decametre?
10,000
A cube of metal has a volume of 100 cm³ and a density of 8 g/cm³. What is its mass?
800 g
A diver descends to a depth of 30 m in seawater (density = 1025 kg/m³). Calculate the total pressure acting on the diver, including atmospheric pressure (1.01 × 10⁵ Pa). Take g=10 m/s2.
409,500 pascals
A tennis ball weighing 10 N is exactly half submerged when floating on pure water. What is the buoyant force acting on the ball?
10 N
A 200 g sample of hot water at 80 °C is mixed with 300 g of cold water at 20 °C in an insulated container. Assuming no heat is lost to the surroundings, what is the final temperature of the mixture?
44 deg C