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Ede4ka [16]
3 years ago
10

While in the air (neglecting air resistance) the

Physics
1 answer:
Shalnov [3]3 years ago
7 0

Anwser

For general projectile motion with no air resistance, the horizontal component of a projectile's velocity ... D. first decreases and then increases ... E. The speed of the object is constant but its velocity is not constant. C ... Neglecting air resistance, when the package hits the ground

Explanation:

You might be interested in
How does the conservation of energy effect our lives?
kupik [55]

Answer:

The Good with the Bad

What do eating a large delicious meal, taking out a loan to buy a car, and staying up all night to finish a paper have in common? They're all things that produce a good result or make us happy, but also have some negative consequences (gaining weight, going into debt, and being tired respectively). Everything in life has negative and positive consequences. Energy conservation is no different. In this lesson, we will learn more about the intended and unintended consequences of energy conservation.

Intended Consequences of Energy Conservation

In light of air pollution, the overuse of fossil fuels, and other issues efforts to conserve energy have been ramped up in the last few decades. Energy conservation can refer to reducing the amount of energy used or finding alternatives to traditional energy sources. There are several ways to conserve energy.

Recycling

Recycling involves making new products out of already existing material. This method of energy conservation works by taking already formed material and processing it into something new. It takes much more energy to create material from scratch than to make it from recycled material. For example, it takes 30% less energy to make recycled glass than to make brand new glass.

Reducing Energy Use in Homes

We can conserve energy in our homes by unplugging and turning off lights and appliances when they are not in use. Obviously, there are some exceptions. Please don't go unplugging your refrigerator! However, many appliances like coffee makers and cell phone chargers can be unplugged when you're not using them. Homeowners can also better insulate their homes to reduce heat usage. Energy can also be conserved by buying appliances that are designed to be energy efficient. Both of these strategies save consumers money on their electric bills, so it's a win-win situation. Using less power overall reduces the pollution from power plants. When we use less energy in our homes, the power plants need to burn less fossil fuels. Burning less fossil fuels reduces pollution and helps conserve natural resources.

Save the Animals

As mentioned above, when consumers use less energy, less fossil fuels need to be burned. When the demand for fossil fuels is reduced, there is less drilling for oil and extraction of resources from nature. Less extraction from the environment results in less damage to habitats and ecosystems. When there are less fossil fuels used, there is also a reduction in oil spills in the oceans and in toxic waste produced from power plants. All of these factors benefit animals and the environment because they are disturbed less.

In this section we will discuss three specific energy conservation efforts and their unintended consequences.

Wind Power

Wind Power involves the use of large turbines (blades) that turn wind into useful energy. Wind turbines can take up large areas of land. While that land can often be shared due to the largest part of the turbines being in the air, flying birds and bats can be killed by spinning turbines. It seems pretty logical to place wind turbines near oceans since shore areas are often windy. However, the turbines can disrupt the habitats due to the space they take up and the danger they pose to flying animals. Another issue is that wind turbines can be annoying to the people who live near them. Some people have reported issues with sound and vibration from the turbines.

8 0
3 years ago
What is the relationship between potential and kinetic energy?
PilotLPTM [1.2K]
Potential energy is stored an object , where as kinetic energy is energy in a object during movement . Potential energy is what kinetic energy transfers into 
6 0
4 years ago
Read 2 more answers
An incompressible fluid is flowing through a horizontal pipe with a constriction. The velocity of the fluid in the wide section
lapo4ka [179]

The Bermoulli's  equation allows us to find the pressure in the narrow part of the pipe through which water circulates is:

             P = 500 Pa

Bernoulli's equation is the work-energy relationship for fluids that are liquids and gases.

           P_1 + \frac{1}{2} \rho v_1^2 + \rho g y_1 = P2 +  \frac{1}{2} \rho v_2^2 + \rho g y_2

Where the subscripts 1 and 2 represent points of interest, P is the pressure, ρ the density of the fluid, v the velocity and y the height.

They indicate that the pipe is horizontal, that the pressure in the wide part P₁ = 200 kPa and the velocity is v₁ = 5 m / s and in the narrow part v₂=8.00 m/s, see attached.

Since the pipe is horizontal y₁ = y₂

           P₁ + ½ ρ v₁² = P₂ + ½ ρ v₂²

           P₂ = P₁ + ½ ρ (v₁² - v₂²)

Let's calculate

          P₂ = 200 10² + ½ ρ (5² - 8²)

          P₂ = 2 10⁴ - 19.5 ρ

For a specific calculation the value of the density of the fluid is needed, suppose that the fluid is water ρ = 1000 kg / m³

           P₂ = 2 10² - 19.5 1000

           P₂ = 500 Pa

In conclusion using the Bermoulli equation we can find the pressure in the narrow part of the pipe through which water circulates is:  

             P = 500 Pa

Learn more here: brainly.com/question/9506577

3 0
3 years ago
A mass spectrometer is being used to monitor air pollutants. it is difficult, however, to separate molecules with nearly equal m
Fynjy0 [20]

Answer:

The answer is 1250 mm

Explanation:

The path that particles move in the spectrometer is semicircular. Each of the particles has a displacement of twice the radius (2r) from the entrance to where the film is hit. According to the exercise, if the separation between the two molecules is 0.25 mm, then the difference in the radius of the molecules is equal to 0.125 mm. The ratio of mass/radius is equal for molecules, and therefore is equal to:

m = q * B * r / v

m/r = constant

(m/r)CO = (m/r)N = (28.0106 u/r) = (28.0134 u/(r + 0.000125 m))

Clearing and solving r:

r = 1.25 m = 1250 mm

4 0
3 years ago
Two point charges of +2.0 μC and -6.0 μC are located on the x-axis at x = -1.0 cm and x = +2.0 cm respectively. Where should a t
lyudmila [28]

Answer:

  x = -3 cm

Explanation:

The electrical potential is the sum of the potentials of each charge

       V = k ∑ q_{i} / r_{i}

let's apply this to our case where the potential is V = 0 for x = 0

         0 = k (q₁ / (x₁-0) + q₂ / (x₂-0) + q₃ / (x₃-0))

in our case

q₁ = + 2.0 10⁻⁶ C

q₂ = - 6.0 10⁻⁶ C

q₃ = + 3.0 10⁻⁶ C

x₁ = -1.0 cm = 1.0 10⁻² m

x₂ = +2.0 cm = 2.0 10⁻² m

we substitute in the equation

          0 = k (2 10⁻⁶ / 1 10⁻² - 6 10⁻⁶ / 2 10⁻² + ​​3 10⁻⁶ / x)

          3 10⁻⁶ / x = 2 10⁻⁴ - 3 10⁻⁴

          3 10⁻⁶ / x = -1 10⁻⁴

           x = - 3 10⁻² m

           x = -3 cm

7 0
3 years ago
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