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4 years ago

Calculate the acceleration of a train travelling from rest to 24 m/s in 12 seconds.

Physics

1 answer:

AfilCa [17]4 years ago

3 0

Answer:

2 m/s²

Explanation:

Acceleration is equal to velocity divided by the time taken.

24 / 12

= 2

The units for the acceleration is m/s².

The acceleration of the train traveling from rest to 24 m/s in 12 seconds is 2 m/s².

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Why do scientist describe the properties of elemts under "Standard Conditions"?

skad [1K]

The standard states of elements are the forms that they adopt at a temperature of 25°C and pressure of 1 atmosphere. These forms of the elements are the reactants in the formation equations of multi-element substances. The heat of formation (∆Hf°) of an element in its standard state is zero

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3 years ago

The following items are connected in a circuit. in which one would you find a voltage gain?

timurjin [86]

Answer:

Explanation:

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3 years ago

Janet wants to find the spring constant of a given spring, so she hangs the spring vertically and attaches a 0.46 kg mass to the

Ilia_Sergeevich [38]

<u>Answer:</u> The value of spring constant is 121.9 N/m

<u>Explanation:</u>

Force is defined as the mass multiplied by the acceleration of the object.

$F=m\times g$

where,

F = force exerted on the object = ?

m = mass of the object = 0.46 kg

g = acceleration due to gravity = $9.81m/s^2$

Putting values in above equation, we get:

$F=0.46kg\times 9.81m/s^2=4.51N$

To calculate the spring constant, we use the equation:

$F=k\times x$

where,

F = force exerted on the spring = 4.51 N

k = spring constant = ?

x = length of the spring = 3.7 cm = 0.037 m (Conversion factor: 1 m = 100 cm)

Putting values in above equation, we get:

$4.51N=k\times 0.037m\\\\k=\frac{4.51N}{0.037m}=121.9N/m$

Hence, the value of spring constant is 121.9 N/m

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3 years ago

Explain the method to measure the external diameter of a sphere

Anton [14]

Answer:

The sphere is that the circular objects in the two-dimensional space (1) circle

(2) disk. Two-dimensional space is a set of points and the distance of that point, The two points of Sphere that length and center.

The sphere can be constructed as the name of surface form circle about any diameter. The circle is the special type of the revolution replacing the circle,

the sphere is the distance r is the radius of the ball and the circle is the center of the mathematical ball, as the center and the radius of the sphere is to respectively.

The ball and sphere have not to be maintained mathematical references as solid references. A sphere of any radius is centered at the number of zero.

Explanation: Hope this helps and good luck :)

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3 years ago

An opaque box encloses a region of space. We can't tell what is inside the box but we can see that on all faces of the box there

Simora [160]

Answer:

The charge must be negative

Explanation:

Hi!

The direction of the electric field of a charge depends on the sign of the charge, when it is positive, the electric field points outwards the charge but when it is negative, it points towards the charge. (As you can seen on teh attached image)

So, if on the faces of the box, the non-zero elecric field points inwards, it must mean that the total charge inside the box must be negative

3 0

3 years ago