半衰期的問題

Radium 233Ra has a half-life of about 3.8 days. (a) Given 1 88 gram, how much will still be present after 1 day? (b) After 1 year?

想問要怎麼判斷這種類型的題目？

試題1 部分答對 得分 0.25/配分1.00 P標示試題 Figure (left) below shows a LC circuit, the top view of the electric and magnetic field inside the capacitor is shown on the right Figure at some time t. Which of the following statements are corrects for the directions of the electric and magnetic fields inside the inductor (top view) and the current at this moment in the circuit? (0) DE A. The magnitude of the current I is increasing at this moment OB. E-field is pointing into page OC. The magnitude of the current I is decreasing at this moment ✓ D. B-field is pointing out of page ✓ E. E-field is counter-clock-wise X OF. The current I is clock-wise OG. E-field is clock-wise ✓H. The current I is counter-clock-wise

大一普物 不知道怎麼計算 求解🙏

30. Review. A 7.80-9 bullet moving at 575 m/s strikes the hand of a superhero, causing the hand to move 5.50 cm in the direction of the bullet's velocity before stopping. (a) Use work and energy considerations to find the average force that stops the bullet. (b) Assuming the force is constant, de- termine how much time elapses between the moment the bullet strikes the hand and the moment it stops moving.

不知道這題要怎麼計算..求解了謝謝

EXAMPLE 2.8 w Calculate the attractive force between a pair of Ba2+ and S2- ions that just touch each other. Assume the ionic radius of the Ba2+ ion to be 0.143 nm and that of the S2-ion to be 0.174 nm.

請問P->Q的輸出結果為什麼是如此呢？

TIe ♡ To Be 旋轉 亞視 反自 顯示 連結書幾 檔案影像 音訊 填寫 附件註解和視並簽名 Truth Table PO PAQPVQ PAQ PVQ PQPQ FF F F F T T FT F T T F F ↑ Atut TIF F T T F F T TIT T T F T T

請問有沒有大神會翻成程式碼？ 我看不懂 Sieve algorithm

1.1 What Is an Algorithm? 33 for p 2 to n do A[p] - P for p < 2 to [n] do //see note before pseudocode if A[p]+0 llp hasn't been eliminated on previous passes jr p * P while j < n do A[j]0 //mark element as eliminated j<j+ p I/copy the remaining elements of A to array L of the primes if( 0 for p + 2 to n do if A[p] = 0 L[i] + A[p] iki +1 return L

真的超不懂 有沒有厲害的人可以解答 不好意思 感謝

Xo=0 X 3-8 Solving Problems involving Projectile Motion Example 3-10: Level horizontal range. (a) Derive a formula for the y = 0 again here horizontal range R of a projectile in yo = 0 (where x =R) terms of its initial speed v, and angle ©. The horizontal range is defined as the horizontal distance the projectile travels before returning to its original height (which is typically the ground); that is, y(final) = yo. (b) Suppose one of Napoleon's cannons had a muzzle speed, vo, of 60.0 m/s. At what angle should it have been aimed (ignore air resistance) to strike a target 320 m away? R 60° 30° 35 en )

怎麼求？

55. In a 400-m drag race, two cars start at the same time, and each maintains a constant acceleration. The winner's acceleration is 10 4.25 m/s2, and the winner reaches the finish line 248 ms before the loser does. By what distance is the loser behind when the winner reaches the finish line?

2-14的C謝謝！

b. 78 d. 214 P2-12. Change the following decimal numbers into binary using the alternative method discussed in Example 2.18, showing your work: a. 358 c. 4 1364 = O b. 12 3/32 d. 12 57128 P2-13. In a positional number system with base b, the largest integer number that can be represented using k digits is ble – 1. Find the largest number in each of the following systems with six digits. a. Binary c. Hexadecimal b. Decimal d. Octal P2-14. Without converting, find the minimum number of digits needed in the destination alodine system for each of the following cases: a. Five-digit decimal number converted to binary. 19 din b. Four-digit decimal converted to octal. c. Seven-digit decimal converted to hexadecimal.

請問這題強數學歸納法我這樣寫可以嗎？ 請問n=k成立後面要寫Fk=... 嗎? 因為這是強數學歸納法。

1-2 數學歸法 例28 The Fibonacci numbers F, have the initial values Fo= 0, F1 = 1, and the recursion F, F-1 + Fn-2 if n 2. Prove by induction that 72 1-5 F. = 1 ((1+v5 ) 5 ifn>0. (92.93 暨大資 12 2 2 假設v= a=1+05.18-1-5 首先觀察 e' = 3+、5 = a +11 2 2 2 ( (1-√5 1 3-75 R2 如珍E 1 1 fo" R")gn>0