Digital ACT Practice Questions

The mass loss observed in Beaker 4 occurred because: Experiment Context (Osmotic Mass Change in Dialysis Bags): Dialysis tubing bags permeable to water but impe...

If a bag filled with 15% sucrose were placed into Beaker 2 (5% sucrose), what would happen to its mass after 60 minutes? Experiment Context (Osmotic Mass Change...

Based on Table 15, the threshold frequency (f_0) required to eject photoelectrons from potassium lies between: Experiment Context (Photoelectric Work Function o...

According to Einstein's photoelectric equation (KE_max = h*f - Phi), increasing the frequency of incident light above the threshold causes: Experiment Context (...

If the intensity (brightness) of the red light is increased tenfold, what effect will this have on electron emission? Experiment Context (Photoelectric Work Fun...

Based on Table 16, as distance from the earthquake epicenter increases, the time lag between P-wave and S-wave arrivals (S-P delay): Experiment Context (Seismog...

If a new seismic station records an S-P arrival time difference of 4.5 minutes, its distance from the earthquake epicenter is: Experiment Context (Seismogram Tr...

Which fundamental property of seismic waves prevents S-waves from traveling through the Earth's liquid outer core? Experiment Context (Seismogram Travel-Time Cu...

Based on Table 17, how many milliliters of 0.10 M NaOH were required to neutralize the first acidic proton of oxalic acid? Experiment Context (Dual Equivalence ...

The second equivalence point occurs at exactly 40.0 mL of NaOH. This indicates that complete neutralization of a diprotic acid requires: Experiment Context (Dua...

At 30.0 mL of added NaOH, the solution acts as an effective chemical buffer because: Experiment Context (Dual Equivalence Points of Oxalic Acid): A 20.0 mL samp...

Based on Table 18, under ambient CO2 (400 ppm), increasing leaf temperature from 25°C to 35°C causes photosynthetic rate to: Experiment Context (Photosynthetic ...

The decline in photosynthesis at 35°C under ambient 400 ppm CO2 is primarily caused by: Experiment Context (Photosynthetic Rate under Carbon Dioxide Enrichment)...

Why does elevated CO2 (800 and 1,200 ppm) eliminate the high-temperature photosynthetic decline at 35°C? Experiment Context (Photosynthetic Rate under Carbon Di...

Based on Table 19, increasing the bob mass from 50 g to 200 g at a constant length of 0.25 m causes the period to: Experiment Context (Period of a Simple Pendul...

According to the formula T = 2*pi * sqrt(L/g), quadrupling the string length from 0.25 m to 1.00 m causes the period to: Experiment Context (Period of a Simple ...

If a 1.00 m pendulum with a 100 g bob were taken to the Moon (where gravitational acceleration is 1/6 of Earth's), its period would be: Experiment Context (Peri...

Based on Table 20, which mineral sample is most definitively identified as calcite (CaCO3)? Experiment Context (Physical Identification of Geological Minerals):...

Which of the four tested mineral specimens is capable of scratching all of the other three? Experiment Context (Physical Identification of Geological Minerals):...

The reddish-brown streak produced by Mineral Y (hematite, Fe2O3) when dragged across an unglazed porcelain streak plate represents: Experiment Context (Physical...

Based on Table 21, what mass of Iodine-131 will remain after 40 days of radioactive decay? Experiment Context (Radioactive Decay of Iodine-131): A radiochemist ...

During beta-minus decay, an Iodine-131 nucleus (Z=53) emits an electron (beta particle) and an antineutrino, transforming into: Experiment Context (Radioactive ...

If the initial sample temperature is heated from 20°C to 1,000°C in an induction furnace, the half-life of Iodine-131 will: Experiment Context (Radioactive Deca...

Based on Table 22, which environmental condition produced the greatest reduction in foliar transpiration rate compared to baseline? Experiment Context (Foliar T...