paul499111 paul499111

23-10-2020
Physics

contestada

Calculate the dot product of D and E, where D=7i - 3j + 2k and E=4i + 5j - 3k.

please show working

Respuesta :

23-10-2020

Answer:

Since i dot i = 1 and j dot j = 1 and k dot k = 1 and the other terms are zero

(7 i - 3 j + 2 k) dot (4 i + 5 j - 3 k) = 28 - 15 -6 = 7

Answer Link

Otras preguntas

Use the organized list which shows the possible outcomes of flipping a fair coin three times, where H is heads and T is tails. Sample Space HHH HHT HTH HTT THH

Find the volume of right square Pyramid altitude is 15cm and diagonal is 10cm.

Q4. The following potential differences were measured in a circuit: E is at the same potential as ground and -25 volts wrt D D is -15 volts wrt C C is -10 volts

why two +Eleven + nine

Ilan manages a trauma team in an emergency department. There has been some conflict between the x-ray tech and the nurses when it comes to emergency situations.

Melissa started to run on treadmill after setting his timer for 73 minutes the display says that she has finished 69% of a run how many minutes have gone by rou

Question 6 Find constants a and b such that A² = aA + bl for A = 4 3 1

the wind is blowing hard in past tense

How to naturally work hard?

6. The electronic configuration of some elements is given below. With the help of such electronic configurations, answer the following questions: A = 1s², 2s²,