可算名詞or不可算名詞クイズ vs HARAKU

英語の「数え方」をマスター！可算・不可算名詞クイズアプリ 「appleは数えられるけど、informationは数えられない…」「muchとmany、どっちを使えばいいの？」 そんな英語学習の悩みを解決する、画期的なクイズアプリ「可算名詞or不可算名詞」が登場！ アプリの魅力 2つのチャレンジで徹底攻略: 名詞分類チャレンジ: 出てくる英単語が「可算名詞」か「不可算名詞」か、それとも「どちらにもなる」かを瞬時に判断！単語の自動読み上げで発音も同時に習得できます。 量表現使い分けチャレンジ: "much" "many" "little" "few" など、紛らわしい量表現を適切な文脈で選ぶ実践的な問題に挑戦！ ユニット学習で着実にステップアップ: 各チャレンジは複数のユニットに分かれており、10問ずつの小テスト形式で集中して学習できます。ユニットごとのスコアとクリア状況（チェックマーク）で、あなたの成長を実感！ 充実のフィードバック: 間違えても大丈夫！正解・不正解が分かりやすく表示され、詳細な解説と例文でしっかり理解を深められます。タップで解説の表示・非表示を切り替えられるので、効率的に復習できます。 心地よい学習体験: クイズ中はリラックスできるBGMが流れ、集中力を高めます。効果音で正解・不正解がすぐにわかり、学習が楽しく続きます。 シンプルで使いやすいデザイン: 直感的な操作で、誰でもすぐに学習を始められます。 こんな方におすすめ！ 可算名詞と不可算名詞の区別に自信がない方 much / many / little / few などの使い分けに迷う方 英語の基礎をしっかり固めたい方 楽しく、効率的に英語を学習したい方 今すぐ「可算名詞or不可算名詞」アプリをダウンロードして、あなたの英語力を次のレベルへ引き上げましょう！

HARAKU is an interactive educational app that visualizes the physics of waves in real time. Designed for students, teachers and anyone curious about science, it lets you control how waves behave just by moving sliders, so you can intuitively connect the equations with what you see. Developer: Fuji Bit Inc. HARAKU is the waves edition of the "-raku" physics simulation series. It helps you understand the wave concepts taught in middle school, high school and university physics as moving pictures, not just formulas. 12 simulations in 3 categories: - Wave basics - Superposition: Combine two sine waves and watch them reinforce or cancel. Change the amplitude, frequency and phase of each wave independently to see the principle of superposition. - Reflection: See the moment a traveling wave reflects at a boundary. Switch between a fixed end (phase inverts) and a free end (phase is kept), with the incident, reflected and total waves shown in three layers. - Standing waves: Watch standing waves on a string fixed at both ends while changing the harmonic. Check the positions of nodes and antinodes and the effect of tension and damping. - Fourier synthesis: See how square, triangle and sawtooth waves are made of sine waves (harmonics). The more terms you add, the closer the sum gets to the target waveform. - Sound waves - Beats: Overlap two waves with slightly different frequencies and feel the beats. The envelope clearly shows how the amplitude changes. - Doppler effect: Drag the source and see the wavefronts bunch up in front and spread out behind. Go past Mach 1 to create a shock wave. - Air column resonance (new): Switch between closed and open pipes and change the length, air temperature and resonance number to see the resonant frequency and wavelength. The motion of air particles (a longitudinal wave) is shown next to a graph that draws the displacement as a transverse wave, so you can find the nodes and antinodes. - Waves in a plane & light - 2D ripples: Tap the screen to place sources; a numerical solution of the wave equation draws the interference pattern in real time. - Interference: See the lines of reinforcement and cancellation made by two point sources. The fringe spacing changes with the source separation, frequency and speed. - Diffraction: See waves spread through a slit according to Huygens' principle. The ratio of slit width to wavelength changes how strongly they diffract. - Refraction: Visualize Snell's law, including how waves bend at a boundary and total internal reflection at large angles. - Thin-film interference (new): See why soap films and oil slicks shine in color by changing the film thickness, refractive index, angle and what lies below (air or glass). The phase shift on reflection, the color seen under white light, a color-vs-thickness strip and a reflectance-vs-wavelength graph are shown together. Features: - Clean, easy-to-read design (dark and light themes) - Home screen organized by category - Intuitive parameter sliders: touch, try and understand - An explanation sheet with formulas for every simulation - On iPad in landscape, the canvas and control panel are shown side by side - 16 languages (Japanese, English, Chinese Simplified/Traditional, Korean, Spanish, Portuguese (Brazil), German, French, Hindi, Indonesian, Russian, Italian, Turkish, Thai, Vietnamese), following your device language - No sign-in: start exploring right away Price: - Free - In-app purchases: none - Subscriptions: none - Ads: a banner ad by Pangle at the bottom of the screen