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3 years ago

Using your knowledge of momentum explain why cars are designed to have crumple zones?

1 answer:

4 0

Answer: I think cars are designed to have crumble zone because lets say you're going 60-70 mph and you hit a brick wall that cant move, it would be a very hard jolt causing the beings inside to get thrown forward, but if it has a crumble zone it would slow the the jolt from is slowing down in the hit.

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Name two elements that have similar properties. How can you tell using the periodic table?

tangare [24]

Helium and nitrogen because they are both from the noble gas group.

7 0

4 years ago

A force acting on a moving ball causes its motion to change. This force stays constant.

sashaice [31]

Answer:

you stop the ball or bring it to a different direction

Explanation:

i don't know if this helps. i didn't take physics yet. but i hope this helps.

8 0

3 years ago

6 A simple ideal Rankine cycle with water as the working fluid operates between the pressure limits of 4 MPa in the boiler and 2

makvit [3.9K]

To solve this problem we will start by differentiating the values in each of the states of matter. Subsequently through the thermodynamic tables we will look for the values related to the entropy, enthalpy and respective specific volumes. Through the relationship of Power defined as the product between mass and enthalpy and mass, specific volume and pressure, we will find the energetic values in the two states investigated. We will start defining the states

State 1

$T_1 = 700\°C$

$P_1 = 4 Mpa$

From steam table

$h_1 =3906.41 KJ/Kg$

$s_1 = 7.62 KJ/Kg.K$

Now

$s_1 = s_2 = 7.62 KJ/Kg.K$ <em>As 1-2 is isentropic</em>

State 2

$P_2 = 20 Kpa$

$s_2 = 7.62 KJ/Kg \cdot K$

From steam table

$h_2 = 2513.33 KJ/Kg$

PART A) The power produced by turbine is the product between the mass and the enthalpy difference, then

$Power = m \times (h_1-h_2)$

$P = (50)(3906.41 - 2513.33)$

$P = 69654kW$

b) Pump Work

State 3

$P_3 = 20 Kpa$

$\upsilon= 0.001 m^3/kg$

The Work done by the pump is

$W= m\upsilon \Delta P$

$W = (50)(0.001)(4000-20)$

$W = 199kJ$

5 0

3 years ago

1. Which of the following is the BEST synonym for synthetic?

Stolb23 [73]

Answer:

Artificial is the BEST synonym for synthetic

3 0

3 years ago

What are the seasonal changes in the weasel in florida and the weasel in wyoming

AlekseyPX

Winter weasels, also called ermines or short-tailed weasels, have coats that turn from light brown to white in the winter. The color change begins at their stomachs and works its way outward, occurring in both spring and fall. Other species, like the long-tailed weasel, may turn at least partially white as well.

The length of daylight, not temperature, prompts the color change. As a result, weasels in winter may be stark white against a brown landscape before snow starts to fall. During warmer winters, this makes them easy prey for larger predators such as foxes, martens, and badgers.

7 0

3 years ago