Digital ACT Practice Questions

A 1.0 kg mass oscillates on a vertical spring (k = 100 N/m): - At top of swing (maximum displacement): Kinetic energy = 0 J, Potential energy = 2.0 J - At equil...

Hoffman apparatus electrolysis of acidified water (2 H2O -> 2 H2 + O2) produced gases at cathode and anode: - Cathode: Gas A volume = 40.0 mL - Anode: Gas B vol...

Meteorological data across a fast-moving cold front: - Ahead of front (Warm sector): Temp = 24°C, Pressure = 100.8 kPa, Winds from SW - Behind front (Cold secto...

An object was placed at various distances d_o in front of a concave mirror (focal length f = 20 cm): - d_o = 60 cm: Image distance d_i = 30 cm, Real, Inverted -...

Biochemists measured DNA melting temperature (Tm) for synthetic oligonucleotides: - Oligo 1 (20% GC, 80% AT): Tm = 68.2°C - Oligo 2 (40% GC, 60% AT): Tm = 76.5°...

A uniform lever balanced horizontally on a central fulcrum: - Left side: Mass m1 = 4.0 kg at distance d1 = 1.5 m (Torque = 4.0 * 1.5 = 6.0 kg*m) - Right side: M...

Precipitation of lead(II) iodide: Pb(NO3)2 + 2 KI -> PbI2(s) + 2 KNO3. - Flask 1: 0.10 mol Pb(NO3)2 + 0.10 mol KI -> 0.05 mol PbI2 formed - Flask 2: 0.10 mol Pb...

Global climate simulations modeled atmospheric cyclone rotation: - Northern Hemisphere low-pressure systems rotate COUNTERCLOCKWISE. - Southern Hemisphere low-p...

A monochromatic green laser (532 nm) illuminated two slits separated by distance d: - Slit separation d = 0.25 mm: Fringe spacing delta y = 4.2 mm - Slit separa...

Based on Table 1, which catalyst demonstrated the highest rate of H2O2 decomposition? Passage Context (Chemical Kinetics): A chemistry research team investigate...

Suppose a fifth trial were conducted under identical conditions using 0.05 g of MnO2 (half the mass used in Trial 3). The time required to collect 50 mL of O2 w...

In the experiment shown in Table 1, which variable was held constant across all four trials? Passage Context (Chemical Kinetics): A chemistry research team inve...

According to Table 2, as the temperature of any given magma composition decreases, its viscosity: Passage Context (Planetary Geology): Geologists tested the rel...

Based on Table 2, at 1000°C, how does the viscosity of rhyolitic magma compare to the viscosity of basaltic magma? Passage Context (Planetary Geology): Geologis...

A volcanologist hypothesizes that explosive volcanic eruptions are fueled by expanding volatile gases unable to easily escape high-viscosity magmas. Based on Ta...

Based on Table 1, as substrate concentration increases from 5 mM to 160 mM, the reaction velocity: Experiment Context (Enzyme Kinetics of Catalase): Researchers...

In this experiment, which of the following variables was held constant? Experiment Context (Enzyme Kinetics of Catalase): Researchers measured the initial react...

At substrate concentrations above 80 mM, the rate of increase in velocity slows primarily because: Experiment Context (Enzyme Kinetics of Catalase): Researchers...

Based on Table 2, Species Y is best classified as a: Experiment Context (Photoperiodic Induction of Flowering): Botanists exposed three varieties of plants (Spe...

Which species demonstrated flowering behavior completely independent of dark period length? Experiment Context (Photoperiodic Induction of Flowering): Botanists...

If a researcher briefly interrupts the 16-hour dark period of Species Y with a 5-minute flash of red light, Species Y will most likely: Experiment Context (Phot...

Based on Table 3, doubling the release height h from 0.20 m to 0.40 m causes the launch speed to: Experiment Context (Incline Ramp Velocity and Range): A steel ...

If a sphere were released from a height h = 1.60 m under identical conditions, the predicted horizontal range would be closest to: Experiment Context (Incline R...

The time required for the sphere to fall from the table edge to the floor depends exclusively on: Experiment Context (Incline Ramp Velocity and Range): A steel ...