PHYSICS HIGH SCHOOL

A jet plane lands at a speed of 100 m/s and can accelerate at a maximum rate of -5.00 m/s^2 as it comes to a rest.(a from the instant the plane touches the runaway, what is the minimum time needed before it can come to a rest?
(b Can this plane land on a runaway that is only 0.800 km long?
shown work pls will reward alot of points

Answers

Answer 1

Answer:

Answer:

a) t = 20 s, b) x = 1000 m, As the runway is only 800 m long, the plane cannot land at this distance

Explanation:

This is a kinematics exercise

a) in minimum time to stop,

v = vo + at

v = 0

t = -v0 / a

we calculate

t = -100 / (5.00)

t = 20 s

b) Let's find the length you need to stop

v² = vo² + 2 a x

x = -v0 ^ 2 / 2a

x = - 100² / 2 (-5.00)

x = 1000 m

As the runway is only 800 m long, the plane cannot land at this distance.

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If the wavelength of a photon in vacuum is the same as the de broglie wavelength of an electron, then the

Answers

Answer:

Explanation:

The photons travel faster faster through space because photons always travel through space faster than electrons, in fact when an electron gets hitted by a photon this boost its speed

Which of the following is a scalar quantity?

Answers

Answer:

C. 100 ft/min

Explanation:

A scalar quantity has no direction.

A scalar with direction is called a vector.

Answer:

C. 100ft/min

Explanation:

A scalar quantity is a quantity that has a magnitude but no direction, a vector quantity is a quantity that has both a magnitude and a direction. The other three answers are vectors quantities while C. is a scalar.

On a velocity time graph like this one, the slope tells you the ______ of the object.

Answers

Answer:

On a velocity time graph like this one, the slope tells you the acceleration of object.

Explanation:

On a velocity time graph, velocity is on y-axis while time on x-axis.
Slope on graph shows the change in velocity with time which is equal to the acceleration of object.

Acceleration

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hope this helps :)

What is the percent by mass of 5.0 g of iron (II) sulfate dissolved in 75.0 grams of water?

Answers

Considering the definition of percentage by mass, the percent by mass of 5.0 g of iron (II) sulfate dissolved in 75.0 grams of water is 6.25 %.

The percentage by mass expresses the concentration and indicates the amount of mass of solute present in 100 grams of solution.

In other words, the percentage by mass of a component of the solution is defined as the ratio of the mass of the solute to the mass of the solution, expressed as a percentage.

The percentage by mass is calculated as the mass of the solute divided by the mass of the solution, the result of which is multiplied by 100 to give a percentage. This is:

$percent by mass= (mass of solute)/(mass of solution)x100$

In this case, you know:

mass of solute= 5 g
mass of water= 75 g
mass of solution= mass of solute + mass of water= 5 + 75 g= 80 g

Replacing:

$percent by mass= (5 g)/(80 g)x100$

Solving:

percent by mass= 6.25 %

Finally, the percent by mass of 5.0 g of iron (II) sulfate dissolved in 75.0 grams of water is 6.25 %.

Learn more:

Hello!

What the percent by mass of 5.0 g of iron (II) sulfate dissolved in 75.0 g of water?

We have the following data:

m1 (solute mass - iron II sulfate) = 5.0 g

m2 (solvent mass - water) = 75.0 g

m (solution mass) = m1 + m2 = 5.0 + 75.0 = 80.0 g

%m/m (percent mass by mass) = ?

We apply the data to the formula

$\%\:m/m = (m_1)/(m)*100$

$\%\:m/m = (5)/(80)*100$

$\%\:m/m = 0.0625*100$

$\boxed{\boxed{\%\:m/m = 6.25}}\Longleftarrow(solute\:in\:percent)\:\:\:\:\:\:\bf\blue{\checkmark}$

Answer:

The percent by mass of solute and mass solution of Iron II Sulfate is 6.25%

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Which of these is considered a satellite galaxy of the Milky Way Galaxy?a. Virgo
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Answers

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Answers

Answer:

Explanation:

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