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Lelu [443]
2 years ago
15

Solve K = 1/2 mv^2 for m

Mathematics
1 answer:
Dahasolnce [82]2 years ago
4 0

Answer:m=2k/v^2

Step-by-step explanation:

The first thing you should do is divide 1/2 on both sides. Now you have 2k=mv^2. Then divide v^2 from each side and you get a final answer of (2k/v^2)=m

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A passenger train and a freight train leave San Jose at 3PM, traveling in the same direction. The passenger train is going three
Liono4ka [1.6K]

Let's say that the speed of the freight train is x and the one of the passenger train is 3x.

x MPH means every hour the freight train covers x miles., which means in 3h it will have covered 3 times as much: 3x mi.

Following the same logic, 3x MPH means every hour the passenger train covers 3x miles, meaning after 3h it will have covered 3 times as much as well: 9x mi.

Now, having expressed those distances and speeds algebraically, we find the difference between the two distances covered after 3h, knowing it will be equal to 240:

9x-3x=6x\\6x=240\\x=240/6\\x=40

Knowing this, we can surely affirm that the freight train is travelling at 40MPH and the passenger train is travelling three times as fast, 120MPH.

5 0
3 years ago
a bank is offering a simple interest of 3.2% on a saving account , if i deposit $15000, how much will the interest be in 6years?
kotykmax [81]

Answer:

$2,880

Step-by-step explanation:

interest = (principal * rate * time)/100

= (15000 * 3.2 * 6)/ 100

= 2880

8 0
3 years ago
8 people eat at Charlie Brown's for Thanksgiving. How many different seating
never [62]

Answer: 40,320

Step-by-step explanation: Let's say that there is person A,B,C,D,E,F,G,H. and 8 chairs. For the first chair, 8 different people could potentially sit in it, making 8 different possibilities. No matter who sits there, the logic follows the next table. However, since one person is sitting in the first chair, there are 7 different possibilities about who would be sitting in the second chair. If you multiply the two together, there are 56 different possibilities just for the first and second chair. For the third chair, there are 6 different possibilities about whom could sit. Multiply 56*6 and you get 336 possibilities. Keep multiplying out and you get a grand total of 40,320 different arrangements!

4 0
3 years ago
Read 2 more answers
The triangles shown are congruent by the SSS congruence theorem.
denis23 [38]
1. Let's check the problem backwards. So let's map A"B"C" to ABC

2. We first need to reflect  A"B"C" to A"B"C' with A"B"" as the axis of rotation.

3. Then we shift a few units up (translation) A"B"C' to A'B'C

4. Finally we rotate A'B'C around C to map the triangle onto ABC

going backwards we get the answer: b

<span>b.rotation, then translation, then reflection</span>

3 0
2 years ago
Read 2 more answers
Oliver and Marie open bank accounts at the same
Katena32 [7]

Answer:

A. 10 weeks

Step-by-step explanation:

Oliver  Marie

Starting 300  200

week 1 310  220

week 2 320  240

week 3 330  260

week 4 340  280

week 5 350  300

week 6 360  320

week 7 370  340

week 8 380  360

week 9 390  380

week 10 400  400

3 0
2 years ago
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