「x＝aにおける」という部分が理解できません。 あと、f´(a)が傾きになるということもよく分かりません。

xの値がαからa+hまで変わるときのf(x) の平均変化率 →ayh-a:h f(a+h)-f(a) +1) Sh A において,んを0に限りなく近づけるとき, 平均変化率が,ある決まった 値に限りなく近づくならば,その極限値を, 関数 y=f(x)のx=aにお ける微分係数または, 変化率 といい, f'(a) で表す。 微分係数 リジットの f'(a)=lim 2+3) h→0 fath) f(ar) 平均変化率の極限 h (傾き)

【問題英語ですみません】27番なんですけど、答えは147Jになるんです、でも私が計算しても全くその答えにならないんです… 説明お願いします🙇‍♂️🙇‍♂️

D) potential energy c) clectromagnctic encrgy 9 gravitational potential eneTgy Numerical Response 27.A girl hifts her 30-kg knapsack a yertical distancc of 0.50 m. Then she carrics it 10 m across the park to the Watcr fountain. What is (hc valuc of thc work done by (hc girl? Ye 1

英語ですみません🙇‍♂️この問題からcとdってどうやって求めたらいいんですか？説明お願いします🙇‍♂️ c) 3.81x10^3 d) 43.6%

Science 10AP 2020 Use the following information to answer the next question. 18. A student exerts a force of 130 N on a wagon that has a mass of 20.0 kg to moveitata constant speed up a hil. The wagon travels 43.0 m along the slope before arriving at the top of the hill. The net vertical gain in height of the wagon is 15.0 m, as shown in the diagram below. 45.0 m 15.0 m SN 150 N= Force Y 196 N (20.0 kg) a. What is the work input by the student? b. What is the change in energy in gravitational energy of the wagon? c. What is the useful work done by the studen(? d. What js the efficiency of this energy transfer?

解き方がわかりません… 最後のカッコは答えです。［W］［E］ は方角のことを示してます。 方位が入るとどう計算していいのかわからないです、説明お願いします🙇‍♂️ 問題英語です。加速度の問題です

10. Hoping to avoid a speeding ticket* Misha hits the brakes and in 10s, decreases her car's Velocity from 120kmh [W] to 100kmh.[W] on the Whitemud Freeway. What is the car's acceleration? 72.00 <*//) Matt is traveling with Charlotte and the Eskimoes at a speed of 30m/s heading East. They suddenly come across the Rider's Nation and quickly change course heading back West at 60 m/s in 1.5s. Find the acceleration of the Charlotte, Brynn and the Eskimoes. 69,人6 /// Ben is traveling on plane at 500km/h. It accelerates at a rate of Skm/h per second for one minute to avoid hitting a duck. What is the final speed of the plane? (9Y7の7

答えは2 なんですが、1ではダメな理由を教えて下さい

記 oi 結ん WW YY21Aシ4スル Clothes and fashion have become an important criterion by ( ⑪ what ② which ⑳ whose ea 用 4。 。 間、 | NRNW 5 RES時2

この問題の解説お願いします🙇‍♀️ 苦手なのでわかりません😭 訳はわかります

(1 Mark) Arrange the following glassware from LOWEST to HIGHEST accuracy: Graduated Cylinder, Volurmetric Flask, Erlenmeyer Flask. (1 Mark) You weigh a crucible before and after your burn magnesium metal. Your initial weight is 20.05g 0.0lg. Your fmal weight after it is burned is 22.05gよ 0.01g. What is the weight of the burned sarmmnple? (Hinal - Initial) (2 Marks) You measure the mass of a solhd Na (sodium) metal to be 10.0 g 0.lg and measure its volume to be 10 cm9ょ1 cm9.What is the density of the sodium mmetal? (density = imass / volumme)

これの1番わかる方教えてください！

Am astronaut has anded on Planet N-40 and conducts an experiment to 5pgma determine the cceleration due to gravity on that planet. She uses a Simple pendulum that is 0.640 m long and measures that 10 complete OScilations 26.0 s. What is the acceleration of gravity on Planet N-402* O *smez O ieemss O sz24mss 〇 2s9mss 〇 9.81 m/s2 lfa wave on a rope reflects when itreaches the end of the rope. Explain what happens to the sign of the reflected wave when (a) the end is fixed and (b) the end is loose and is allowed to move up(down.* po Your answer