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4 years ago

Predict the speed of a car after 10.0 s when the car’s speed follows

Physics

1 answer:

andreev551 [17]4 years ago

7 0

Answer:

48 m/s

Explanation:

The time is 10 seconds

The speed of the car after 10 seconds when the relationship is 4.8 m/s^2 × time can be calculated as follows

= 4.8 × 10

= 48

Hence the speed is 48 m/s

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Where is the deepest part of the ocean

Mariana [72]

Answer:

Trenches are the deepest part of the oceans, narrow and long depressions on the sea floor. One good example is the Mariana Trench, the deepest part of the ocean

Explanation:

5 0

3 years ago

You blow across the open mouth of an empty test tube and producethe fundamental standing wave of the air column inside the testt

sertanlavr [38]

Answer:

(a). The frequency of this standing wave is 0.782 kHz.

(b). The frequency of the fundamental standing wave in the air is 1.563 kHz.

Explanation:

Given that,

Length of tube = 11.0 cm

(a). We need to calculate the frequency of this standing wave

Using formula of fundamental frequency

$f_{1}=\dfrac{v}{4l}$

Put the value into the formula

$f_{1}=\dfrac{344}{4\times0.11}$

$f_{1}=781.81\ Hz$

$f_{1}=0.782\ kHz$

(b). If the test tube is half filled with water

When the tube is half filled the effective length of the tube is halved

We need to calculate the frequency

Using formula of fundamental frequency of the fundamental standing wave in the air

$f_{1}=\dfrac{v}{4(\dfrac{L}{2})}$

Put the value into the formula

$f_{1}=\dfrac{344}{4\times\dfrac{0.11}{2}}$

$f_{1}=1563.63\ Hz$

$f_{1}=1.563\ kHz$

Hence, (a). The frequency of this standing wave is 0.782 kHz.

(b). The frequency of the fundamental standing wave in the air is 1.563 kHz.

6 0

4 years ago

The steps below describe how you hear. number the steps in the correct order. the first one is done for you

NNADVOKAT [17]

Hope this helps! : )

6 0

3 years ago

The two hot-air balloons in the drawing are 48.2 and 61.0 m above the ground. A person in the left balloon observes that the rig

Lynna [10]

Answer:

x = 54.15 meters between the balloons horizontally.

Explanation:

Hence, vertical distance between balloons is 12.8 meters.

y= 61-48.2 = 12.2 m

A right-angle triangle is formed with,

angle θ = 13.3 degrees

opposite (y) = 12.8

adjacent (x) = ?

$tan\theta = \dfrac{y}{x}$

Now by putting the values in the above equation.

$tan13^{\circ}=\dfrac{12.8}{x}$

$x=\dfrac{12.8}{tan13^{\circ}}$

x = 54.15 meters between the balloons horizontally.

8 0

3 years ago

Classify Cd2+ Mn2+ Kr Zr as Paramagnetic or diamagnetic

jeka57 [31]

We classify the elements as follows:

Cd2+ = Diamagnetic
Mn2+ = Paramagnetic
Kr = Diamagnetic
Zr = Paramagnetic

Diamagnetic when all electrons are paired which means that in an orbital an electron spins clockwise and another spins anticlockwise while paramagnetic is the opposite.

5 0

3 years ago