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3 years ago

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Physics

1 answer:

9966 [12]3 years ago

7 0

Answer: de?

Explanation:

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Define pressure. write it's Si unit.<br>

tekilochka [14]

Hi :)

Pressure is the force applied perpendicular to the surface of an object per unit area

The SI unit of pressure is N/m^2

Hope this helps!

8 0

3 years ago

Read 2 more answers

A car is travelling at a velocity of 20m/s. After 30sec it covers a distance of 1200 m. Calculate the acceleration of the car an

Umnica [9.8K]

Answer:

Acceleration: $a = 1,3333 \frac{m}{s^{2} }$

Final velocity: $v = 60 \frac{m}{s}$

Explanation:

To calculate the acceleration, you start from the formula:

$s = v_i t+\frac{1}{2}at^{2}$

Thus:

$a = \frac{ 2(s - v_it)}{t^{2}}$

Now that you have the accelration, you can use the this formula to calculate the final speed:

$a = \frac{v_f - v_i}{\Delta t}$

Thus:

$v_f = a \Delta t + v_i$

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3 years ago

Alex swims at an average speed of 45 m/min. How far does he swim in 1 min 24 secs?

ohaa [14]

Answer:

SOLUTION: Alex swim at an average speed of 45 meters per seconds how far does he swim in 1 minutes and 24 seconds. 1 minute and 24 seconds is 84 seconds. If he swims 45 meters every second and he swims for 84 seconds, that means he swims: 45 * 84 = 3780 meters in 1 minute and 24 seconds.

Explanation:

You multiply 45 by 84 and that is equal to 3,780.

3 0

3 years ago

Can anyone help me with 11 and 12 please

dexar [7]

The 1st one is basically B because it will stay in motion with the same speed and in the same direction unless acted on by an unbalanced force and the 2cd one is A because most of is transformed into thermos energy. hope this helps!

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4 years ago

An airplane is trying to fly at a speed of 300 miles per hour straight North, but a 70 miles per hour wind is blowing toward the

OlgaM077 [116]

Answer:

V = 308.06 miles/hour

θ = 13.13° west of north.

Explanation:

Airplane speed = V₁ = 300 miles/hour

Wind speed = V₂ = 70 miles/hour

Resultant speed of the plane = V = ?

As airplane is trying to fly straight North and wind is blowing toward the west. So the angle between airplane velocity and wind velocity is 90°.

By Pythagoras Theorem

V = $\sqrt{V_{1}^{2}+V_{2}^{2} }$

V = $\sqrt{300^{2}+70^{2} }$

V = 308.06 miles/hour

θ = tan⁻¹(70/300)

θ = 13.13° west of north.

3 0

4 years ago