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3 years ago

An object is dropped from rest. Calculate its velocity after 2.5 seconds

Physics

1 answer:

olga2289 [7]3 years ago

6 0

Velocity = 9.8 x 2.5 = .... m/s

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Two trains are traveling side-by-side along parallel, straight tracks at the same speed. In a time t, train A doubles its speed.

sergij07 [2.7K]

Answer:

derdddrdickdd

Explanation:

3 0

3 years ago

Select all of the statements that are true.

Strike441 [17]

I think its all four of them could be wrong but try all four !!!!!!

7 0

3 years ago

Light of wavelength 436.1 nm falls on two slits spaced 0.31 mm apart. What is the required distance from the slits to the screen

kakasveta [241]

Answer:

The correct answer is "4.26 m".

Explanation:

Given:

Wavelength,

$\lambda = 436.1 \ nm$

or,

$=436.1\times 10^{-9} \ m$

Distance,

$d = 0.31 \ mm$

or,

$=0.31\times 10^{-3} \ m$

Distance between the 1st and 2nd dark fringes,

$(y_2-y_1) = 6\times 10^{-3} \ m$

As we know,

⇒ $\frac{d}{L} (y_2-y_1) = \lambda$

or,

⇒ $L=\frac{d(y_2-y_1)}{\lambda}$

By substituting the values, we get

$=\frac{0.31\times 6\times 10^{-6}}{436.1\times 10^{-9}}$

$=\frac{0.31\times 6\times 10^3}{436.1}$

$=\frac{1860}{436.1}$

$=4.26 \ m$

3 0

3 years ago

The total charge that an automobile battery can supply without being recharged is given in terms of Ampere-hours. A typical 12-V

anyanavicka [17]

Answer:

7 hours

Explanation:

The total charge contained in the battery is

$Q = 49 A \cdot h$

And this is a charge, since it is a current multiplied by a time:

$Q=It$

The current drawn by each headlight (which is the charge consumed per second) is

$I=3.5 A$

Since we have two headlight, the total current drawn is

$I=3.5 \cdot 2 = 7 A$

Therefore, the total charge consumed by the two headlights each hour is

$q = I \cdot h = 7 A \cdot h$

So, the time before the battery is dead is

$t=\frac{Q}{q}=\frac{49 Ah}{7Ah}=7 h$

5 0

3 years ago

A positive or negative outcome of a decision or action can be called a

Mandarinka [93]

The answer to this would be :
<span>consequence
</span>hope that this helps you!
Source: I had done a research about this. =)

7 0

3 years ago