In a closed system, glider A with a mass of 0.40 kg and a speed of 2.00 m/s collides with glider B at rest with a mass of 1.20 kg. The two interlock and move off. What speed are they moving at?

Answers

Answer 1

Answer:

The speed are they moving at will be 0.5 m/sec.Law of conservation of momentum is applied.

What is the law of conservation of momentum?

According to the law of conservation of momentum, the momentum of the body before the collision is always equal to the momentum of the body after the collision.

The given data in the problem is;

(m₁) is the mass of 1st gilder= 0.40 kg

(u₁) is the initial velocity = 2 m/s

(m₂) is the mass of 2nd gilder = 1.20 kg

(u₂) is the initial velocity of 2nd gilder = 0 m/s

(v) is the velocity after collision =.?

According to the law of conservation of momentum;

Momentum before collision =Momentum after collision

$\rm m_1u_1 + m_2u_2 = v(m_1 + m_2)\n\n(0.40* 0.25) + (1.2 * 0) = v * (0.40+1.20) \n\n 125 + 0 = v * (1250) * 125 \n\n \rm v= (0.8)/(1.6) \n\n \rm v= 0.5 \ m/sec$

Hence, the speed are they moving at will be 0.5 m/sec

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Answer 2

Answer: Conservation of momentum.
m1*u1 + m2*u2 =m1*v1 + m2*v2
here u2=0 body at rest, v1=v2=v both interlock and move together
0..4*2+1.2*0 = 0.4*v+1.2*v
v= 0.8/1.6 = 0.5 m/sec

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Which of the following is a disadvantage of friction?Air resistance of a parachute slows down the descent of a skydiver.
Friction reduces the efficiency of engines and other machines by converting parts of their kinetic energy into heat.
Friction makes it possible for you to grasp items with your hand.
Friction enables you to walk.

Answers

Explanation:

The disadvantage of friction is that it reduces the efficiency of engines and other machines by converting parts of their kinetic energy into heat.

Friction between moving parts in engines and machines causes resistance, leading to energy loss through heat generation. This energy loss affects the overall efficiency of the system and can lead to increased wear and tear on the components. Engineers often design systems to minimize frictional losses through the use of lubricants, materials with low friction coefficients, or implementing other techniques to reduce friction.

The other statements mention advantages of friction:

- Air resistance of a parachute slows down the descent of a skydiver, which is beneficial for a controlled landing.

- Friction enables you to grasp items with your hand, providing the necessary grip and control.

- Friction also enables you to walk by creating the necessary traction between your feet and the ground, allowing forward motion.

What runs along the top of the troposphere

Answers

Jet stream runs along the top of the troposphere as a high-speed, narrow air current flowing from west to east.

The "jet stream" is the narrow, high-speed tropospheric air current that flows west to east. The jet stream is a major atmospheric phenomena that occurs between 9 and 16 kilometres above the Earth's surface. Cold polar air and warmer equatorial air cause it. The jet stream's meandering route can affect weather patterns, storm movement, and large-scale weather. The jet stream's behaviour affects travel schedules and fuel efficiency, thus meteorologists use it to anticipate weather.

"Jet stream." The jet stream is a narrow, high-speed air movement that sweeps along the troposphere's top 9–16 kilometres (30,000–50,000 feet) above Earth. It shapes weather patterns and influences weather systems worldwide as it moves west to east. The jet stream affects temperature, precipitation, and atmospheric conditions, thus meteorologists study it to predict weather changes.

To know more about troposphere

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Complete quesion:- "What runs along the top of the troposphere and is a high-speed, narrow air current flowing from west to east?"

it will be the stratosphere with the ozone layer

Ok I'm doing physics gragh an I don't know how to find the impulse on a graph

Answers

OK instead of telling us what you don't know, it would actually be much more helpful if we could talk about what you DO know.

What is it a graph of ?

-- Impulse is (force applied) x (time the force persists).
Is there force or time anywhere on the graph ?
Is there acceleration anywhere on the graph, and do you know the mass ?
With acceleration and mass, you could calculate the force.

-- Impulse is also the change in momentum.
Is there momentum anywhere on the graph ?
Is there speed anywhere on the graph, and do you know the mass ?
With speed and mass, you can calculate the momentum.

We can use what you know to solve the problem. But we cannot use
what you don't know to solve the problem.

I just had the coolest idea: What if you took a picture of the Physics gragh
that you're doing, and post it here along with your question ? ! Then we
would have the same information that you have, and we could show you
how to use it.

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Answers

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Answers

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Answer:

Explanation:

ITS RIGHT

. A nonnative species of animal is introduced into a healthy ecosystem. In it's new environment, this species has no predators, although it preys on several native animals in the ecosystem. Make a prediction about the biodiversity and health of this ecosystem in the future.a.) Biodiversity and ecosystem health will both increase in the future.
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i believe the answer is B!

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