Exams & Certification

In the figure, block 1 has mass m1 = 450 g, block 2 has mass m2 = 560 g, and the pulley is on a frictionless horizontal axle with a radius R = 5.4 cm. When released from rest, block 2 falls 73 cm in 5.2 seconds without the cord slipping on the pulley. (a) […]

A review of Kappo Masa, a popular restaurant in New York City, notes, “The markup that New York restaurants customarily add to retail wine and sake prices is about 150 percent. The average markup at Kappo Masa is 200 percent to 300 percent.” Even 150 percent is a much larger markup than the markups restaurants

The perpendicular bisector of side AB of ∆ABC intersects the extension of side AC at D. Find the measure of ∠ABC if m∠CBD = 16° and m∠ACB = 118°. The Correct Answer and Explanation is: To find the measure of angle ∠ABC, let’s analyze the given information step by step: Given: Step-by-step

Need kopo ng answer? What I Know Unscramble each of the letters below to reveal the cycle being described. Write your answer in your activity notebook: DESCRIPTION SCRAMBLED ANSWER LETTERS There are natural BIOGEOCHEMICAL occurrences that happen in our ecosystem which are responsible in the cycling of materials available to living organisms for their maintenance

Find the area of a regular decagon with radius 12 cm.A = _ The Correct Answer and Explanation is: Answer:The area AAA of a regular decagon (10-sided polygon) with a radius (distance from center to a vertex) of 12 cm is approximately: A=10×12×r2×sin⁡(360∘10)=10×12×122×sin⁡(36∘)=5×144×sin⁡(36∘)≈720×0.5878≈423.22 cm2A = 10 \times \frac{1}{2} \times r^2 \times \sin\left(\frac{360^\circ}{10}\right) = 10 \times \frac{1}{2}

The area of a regular decagon is 50 cm2. What is the area of a larger regular decagon with sides four times the sides of the smaller decagon? Correct Answer:The period number of an element tells us the number of electron shells (energy levels) that an atom of the element possesses. Textbook-Style ExplanationThe periodic table

What can the period number of an element tell us about that element? The Correct Answer and Explanation is: Correct Answer:The period number of an element tells us the number of electron shells (energy levels) that an atom of the element possesses. Textbook-Style ExplanationThe periodic table is arranged in rows called periods and columns called

Observation of burning match or splint – What caused the change in the burning match or splint? NaCl(aq) + HCl(aq) → NaCl(aq) + H2O(l) → NaCl(aq) + H2O(l) → NaCl(aq) + O2(g) → Type of reaction: Combustion Hydrogen Peroxide Reactants Appearance of Reactants Evidence of a Chemical Reaction H2O2(aq) H2O(l) + O2(g) Type of chemical

Observation of burning match or splint: It immediately went out. What caused the change in the burning match or splint? Lack of oxygen from the CO2 gas formation, displacing air: NaCO2 + 2 HCl(aq) → CO2 + H2O + NaCl(aq). Type of reaction: Decomposition. Hydrogen Peroxide Reactants: 1. Appearance of Reactants: Clear; colorless liquid. Evidence

A blue whale can weigh up to 400,000 pounds. A standard school bus has a gross weight of 25,000 pounds. How many school buses are equivalent to the weight of a blue whale? The Correct Answer and Explanation is: Correct Answer:To find how many school buses equal the weight of a blue whale, divide the