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GuDViN [60]
4 years ago
8

When the brakes of a certain car are applied, a deceleration of 6.0 m/s is produced. How much time will it take to bring the car

to a halt from an initial speed of 110 km/hr?
Physics
1 answer:
nexus9112 [7]4 years ago
8 0
Use the formula:

V=V_o+at\\
\\
15.27=30.55-6t\\
\\
6t=30.55-15.27\\
\\
6t=15.28\\
\\
t=\frac{15.28}{6}=2.54 \ s

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inessss [21]

Hello there, the answer to your question is

B

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C

I hope I helped :)

7 0
3 years ago
Leon sees a poster that shows a lake in front of a snow-capped mountain. The mountain appears upside down in the lake. Which bes
arsen [322]

Answer: The correct answer is "The surface of the lake is smooth".

Explanation:

The light gets reflected from the smooth surface at the same angle as it hits that surface. If the light gets reflected in all direction from the rough surface when it hits the surface. Then, there will be diffuse reflection.

In the given problem, Leon sees a poster that shows a lake in front of a snow-capped mountain. The mountain appears upside down in the lake. Here, the water acts like a mirror. The light rays incident on the surface of the water from the mountain then the reflected rays get reflected back from the smooth surface of the lake. Here, the angle of incidence is equal to the angle of the reflection.

One can see the image of the object on the surface of the lake.

Therefore, the correct option is (A).

4 0
3 years ago
Read 2 more answers
Three faces of a cube of side length 2 cm each have a uniform electric field of magnitude 500 N/C pointing directly inward. The
Maurinko [17]

Answer:

Q=-8.85*10^{-12}*0.36 C =-3.186*10^{-12} C

(negative charge)

Explanation:

Hi!

To solve this problem we use Gauss Law for electric fields, which relates the flux of electric field E through a closed surface S with the charge Q enclosed by that surface:

\int_{S} \vec{E}\cdot \vec{n} \;dA = \frac{Q}{\epsilon_0}

\vec{n} = \text{outwards surface normal}\\\epsilon_0 = 8.85*10^{-12}\frac{C^2}{Nm^2}

In this problem S is a cube of side length 2cm. The integral is easy because the electric field is uniform in each face, and normal to the face. The total integral is the sum of the integrals in each of the six faces.

\int_{S} \vec{E}\cdot \vec{n} \;dA = \frac{Q}{\epsilon_0} = 3(-500\frac{N}{C} (2cm)^2) + 3(200\frac{N}{C} (2cm)^2)

(-1500*4*10^{-4}\frac{Nm^2}{C} + 600*4*10^{-4}\frac{Nm^2}{C} )=-0.36\frac{Nm^2}{C}

Q=-8.85*10^{-12}*0.36 C =-3.186*10^{-12} C

3 0
3 years ago
What type of relationship is shown in the graph
fenix001 [56]

Answer:

A linear, positive relationship

Explanation:

The graph is a line, so it is linear and the slope is positive, so it is positive...

6 0
3 years ago
A brick is 32cm long and 10cm wide. It weighs 16N and is lying on the ground. Find the pressure exerted by the brick on the grou
Vaselesa [24]

Answer:

Below

Explanation:

First, we need to convert the dimension from cm to m before plugging it into the equation:

     32 / 100 = 0.32 m

     10 / 100 = 0.1 m

You can use this equation to find the pressure exerted on the ground

     Pressure = Force / Area

Plugging our values in.....

     Pressure = 16 Newtons / (0.1)(0.32)

                     = 16 Newtons / 0.032

                    = 500 N/m^2

Hope this helps! Best of luck <3

4 0
3 years ago
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