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2 years ago

What’s the answer?? middle question

Physics

1 answer:

juin [17]2 years ago

6 0

The new volume = 3 x 52.6 that’s because as the pressure decreases by 1/3 the volume increases x3

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Find the magnitude of vector A = i - 2j + 3k O V14 10 O4

koban [17]

Answer:

The magnitude of the given vector is $\sqrt{14}$

Explanation:

For any given vector $\overrightarrow{r}=x\widehat{i}+y\widehat{j}+z\widehat{k}$

The magnitude is given by

$|r|=\sqrt{x^2+y^2+z^2}$

comparing with the given vector $\overrightarrow{A}=1\widehat{i}-2\widehat{j}+3\widehat{k}$

we get

x = 1, y = -2, z = 3

Thus the magnitude of vector A is

$|r|=\sqrt{1^2+(-2)^2+3^2}\\\\\therefore |r|=\sqrt{14}$

7 0

3 years ago

The formula d = t² + 5 t expresses a car's distance (in feet) from a stop sign, d, in terms of the number of seconds t since it

Lubov Fominskaja [6]

Answer:

The car's average speed is 16 feet per second.

Explanation:

The expression for the average speed is as follows;

$A.S=\frac{\textrm{Total distance}}{\textrm{total time}}$

Given expression of distance:

$d=t^{2}+5t$

Put t= 4 s.

$d(4)=(4)^{2}+5(4)$

d(4)= 36 ft

Put t= 7 s in the given expression.

$d(7)=(7)^{2}+5(7)$

d(7)= 84 ft

Calculate the car's average speed over the interval of time from t = 4 seconds to t = 7 seconds.

$A.S=\frac{d(7)-d(4)}{7-4}$

$A.S=\frac{84-36}{7-4}$

A.S= 16 feet per second

Therefore, the car's average speed is 16 feet per second.

3 0

2 years ago

1. On which date does the Antarctic Circle have 24 hours of daylight? A. June 21

sattari [20]

The date in which the Antarctic Circle has 24 hours of daylight on December 21st every year. When energy is transferred to air the particles of air become more excited and move around faster.

5 0

3 years ago

Read 2 more answers

How does the mass of an object affect its acceleration?

solong [7]

Answer:

as the mass of an object is increased, the acceleration of the object is decreased & vice-versa.

Explanation:

hope this helps!

3 0

2 years ago

Count Rumford concluded that heat energy is produced by

topjm [15]

Heat can be produced by the work done in tearing apart particles of brass

5 0

3 years ago