Digital ACT Practice Questions

Seawater density increases continuously from 1,024.2 kg/m^3 at the surface to 1,027.9 kg/m^3 at 2,000 m primarily because: Experiment Context (Subtropical Ocean...

Why does the surface mixed layer (0 to 100 m) maintain a nearly uniform temperature (24.5°C to 23.8°C)? Experiment Context (Subtropical Oceanic Depth Profiles):...

Based on Table 31, the relationship between capillary tube internal diameter and the equilibrium rise height of water is: Experiment Context (Capillary Rise of ...

Capillary rise occurs in glass tubes because: Experiment Context (Capillary Rise of Water in Glass Tubes): Physics students immersed clean vertical borosilicate...

If liquid mercury (which has cohesive forces far stronger than adhesive forces to glass) were used instead of water: Experiment Context (Capillary Rise of Water...

Comparing Experiment 1 and Experiment 2, doubling [A] while holding [B] constant causes the initial rate to: Experiment Context (Reaction Orders of Reaction 2A ...

Comparing Experiment 1 and Experiment 3, doubling [B] while holding [A] constant causes the rate to: Experiment Context (Reaction Orders of Reaction 2A + B -> C...

What is the overall rate law for this reaction? Experiment Context (Reaction Orders of Reaction 2A + B -> C): Chemists studied the initial rate of formation of ...

Based on Table 33, under anaerobic conditions, yeast produced substantially greater quantities of: Experiment Context (Metabolic Byproducts of Saccharomyces cer...

Why did the anaerobic culture consume nearly four times more glucose (48.6 g vs 12.4 g) than the aerobic culture? Experiment Context (Metabolic Byproducts of Sa...

Under anaerobic conditions, the biological function of converting pyruvate into ethanol and CO2 is to: Experiment Context (Metabolic Byproducts of Saccharomyces...

Based on Table 34, doubling the slit separation d at a constant screen distance (from 0.10 mm to 0.20 mm) causes the fringe spacing y to: Experiment Context (In...

If the red laser (632.8 nm) were replaced with a violet laser (405.0 nm) at d = 0.20 mm and L = 2.0 m, the fringe spacing would: Experiment Context (Interferenc...

The bright fringes in the interference pattern are produced by: Experiment Context (Interference Fringe Spacing of Laser Light): Students directed a 632.8 nm he...

Based on Table 35, the ratio r^3 / T^2 across all four moons is: Experiment Context (Orbital Dynamics of the Galilean Moons): Astronomers compiled semi-major ax...

If a fifth satellite orbits Jupiter with an orbital period T = 14.3 days, its predicted semi-major axis r would be: Experiment Context (Orbital Dynamics of the ...

The value of the constant ratio r^3 / T^2 in a planetary system depends primarily on the: Experiment Context (Orbital Dynamics of the Galilean Moons): Astronome...

Based on Table 36, adding 2 drops of HCl caused the pH of pure water to drop by 3.15 units, whereas the phosphate buffer pH dropped by only: Experiment Context ...

The phosphate buffer resists changes in pH upon the addition of HCl primarily because: Experiment Context (Acid-Base Buffering Capacity of Phosphate Buffer): Bi...

Between 25 drops and 60 drops of HCl, the phosphate buffer experienced a rapid drop in pH from 6.95 to 4.20 because: Experiment Context (Acid-Base Buffering Cap...

Based on Table 37, increasing organic matter from 0% to 8% causes available water capacity (AWC) to: Experiment Context (Soil Water Retention vs Humus Content):...

Organic matter improves water retention in sandy soils primarily because: Experiment Context (Soil Water Retention vs Humus Content): Soil scientists amended sa...

A farmer seeking to protect drought-sensitive crops while maintaining adequate drainage would benefit from amending sandy soil with organic matter because: Expe...

Based on Table 38, the gas evolved at the cathode is produced at twice the volume of the gas at the anode. The cathode gas is: Experiment Context (Stoichiometry...