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Marizza181 [45]
3 years ago
14

The gauge pressure in a car tyre is 300 kPa at 20°C. After moving at high speed, the tyre has

Physics
2 answers:
Makovka662 [10]3 years ago
7 0

Answer:

49.3°C

Explanation:

Since the tire was inflated with air after been gauged. It means the volume of air in the tire stays the same.

At constant volume, Charles law applies.

Charles law states pressure is proportional to temperature.

Hence P1/T1=P2/T2

The formula uses Kelvin for temperature and to convert temperature from degree Celsius to Kelvin we add 273k

T2 = P2 ×T1/P1. =330 × 293/300= 322.3K

322.3-273= 49.3°C

Leno4ka [110]3 years ago
4 0

Answer:

229kPa

Explanation:

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the gravitational force acts on all objects in proportion to their mass. neglecting air resistance, why don’t heavy objects fall
Goryan [66]

Answer:

Because in correspondence to the same distance from a mass, the gravitational acceleration is the same for all the bodies. It doesn't depend on the mass of the objects.

8 0
2 years ago
A barbell is 1.5 m long. Three weights, each of mass 20 kg, are hung on the left and two weights of the same mass, on the right.
VMariaS [17]

Answer:

b. -11.6 cm

Explanation:

We have given parameters:

Length, l = 1.5 m = 150 cm

Mass of weight, m_1 = 20 kg

Width, x = 4 cm

Distance d = 4 cm

Mass of bar, m_{bar} = 5 kg

We are asked to find the center of mass from the mid-point, X_{CM} = ?

Since 3 weights are on the left and 2 weights are on the right, we know:

m_{left} = 3 * 20 = 60 kg

m_{right} = 2 * 20 = 40 kg

And also we know that, M = \frac{l}{2} = 150/2 = 75 cm

For the left side, center of mass is:

x_{left} = \frac{3 * 4}{2} = 6 cm

From the midpoint, the distance to the left is:

X_{left} = -(M - 4 - x_{left}) = -(75 - 4 -6) = -65 cm

For the right side, center of mass is:

x_{right} = \frac{2 * 4}{2} = 4 cm

From the midpoint, the distance to the right will be:

X_{right} = (M - 4 - x_{right}) = (75 - 4 - 4) = 67 cm

Hence,

X_{CM} = \frac{m_{right}*x_{right} + m_{left}*x_{left} }{m_{right} + m_{left} + m_{bar}} = \frac{40 * 67 - 60 * 65}{40 + 60 + 5} = -11.62 cm

4 0
3 years ago
laser light hits two very narrow slits that are separated by 0.1mm adn is viewwed on a screen 2m downstream. Sketch on the axis
Irina-Kira [14]

Answer:

 d y / x = m λ

Explanation:

When the laser beam, which is a coherent light, hits the slits, part of each beam passes through each slit.

When this is observed on a screen that is quite far from the slits, a series of intense linear separated by dark areas. The explanation for this distribution of the light pattern is that when adding the rays that come out of the slits they travel different distances, which introduces a difference in optical path and if this difference is an integer multiple of the wavelength, a bright line

                d sin θ = m λ

Where d is the distance between the slits (0.1 mm)

Also, since the angle of the measurements is small, we can approximate the tangent

          tan θ = y / x = sin θ /sin θ

          sint θ = y / x

Substituting into the equation

          d y / x = m λ

This expression gives the location of the bright lines on the screen

5 0
3 years ago
Read 2 more answers
WA
brilliants [131]

Answer:

the answers the correct one is d

Explanation:

The speed of sound is constant so we can use the relations of uniform motion

           v = x / t

            x = v t

now let's calculate the distance for each person

t = 5s

         x₁ = 300 5

         x₁ = 1500 m

t = 6s

         x₂ = 300 6

         x₂ = 1800 m

therefore we have two possibilities

a) the two people are on the same side, therefore the distance between them is

         Δx = x₂- x₁

         Δx = 1800 - 1500

         Δx = 300 m

       

let's reduce to km

         Δx = 0.300 km

b) people are on opposite sides of the sound

         Δx = x₂ + x₁

         Δx = 1800 + 1500

         Δx = 3300 m

         Δx = 3.3 km

when checking the answers the correct one is d

3 0
3 years ago
i know this is a lot to do but i will give you the highest amount of points (100, but you get 50 from it.) and i will cash app y
victus00 [196]

Answer:

mel mel 4 ever

Explanation:

5 0
3 years ago
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