Digital ACT Practice Questions

Light travels through a core of index n_core = 1.50 surrounded by cladding of index n_clad: - Cladding A (n = 1.45): Critical angle = 75.2° - Cladding B (n = 1....

Choose the best option for the underlined portion: The lead researcher, who the university appointed to head the marine archaeology team, delivered the keynote ...

Choose the best option for the underlined portion: The expedition faced an insurmountable barrier at high elevation, sudden blizzard conditions halted all ascen...

Choose the best option for the underlined portion: Having analyzed the geological sediment layers under electron microscopes, the presence of volcanic ash was c...

Choose the best option for the underlined portion: The municipal archivist preserved the historical artifacts from ancient past centuries in specialized climate...

Choose the best option for the underlined portion: The experimental solar cell demonstrated an unprecedented 32% energy conversion efficiency in laboratory test...

Choose the best option for the underlined portion: The three biologists discovery altered conventional models of deep-sea hydrothermal symbiosis....

What is the determinant of the 2x2 matrix \(\begin{pmatrix} 5 & -3 \\ 4 & 2 \end{pmatrix}\)?...

If \(\cos \theta = -\frac{5}{13}\) and \(\pi < \theta < \frac{3\pi}{2}\), what is the value of \(\tan \theta\)?...

In \(\triangle PQR\), the measure of \(\angle P = 45^\circ\), the measure of \(\angle Q = 30^\circ\), and side \(p = 10\sqrt{2}\). What is the length of side \(...

What is the complex quotient \(\frac{4 + 2i}{1 - i}\), where \(i = \sqrt{-1}\)?...

The third term of a geometric sequence is 18 and the sixth term is 486. What is the first term of this sequence?...

A research committee of 4 scientists is to be formed from a department containing 6 chemists and 5 physicists. If the committee must consist of exactly 2 chemis...

An ellipse is defined by the Cartesian equation \(\frac{x^2}{25} + \frac{y^2}{16} = 1\). What is the distance between its two foci?...

The primary purpose of the passage is to explain: Passage Excerpt (Natural Science): Deep within the abyssal benthic zone, hydrothermal vent communities flouris...

According to the passage, the trophosome in Riftia tubeworms functions primarily as: Passage Excerpt (Natural Science): Deep within the abyssal benthic zone, hy...

As it is used in the final sentence of the passage, the word 'affinity' most nearly means: Passage Excerpt (Natural Science): Deep within the abyssal benthic zo...

The passage suggests that without their unique hemoglobin adaptations, Riftia tubeworms would likely experience: Passage Excerpt (Natural Science): Deep within ...

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...