1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
IgorLugansk [536]
3 years ago
13

List out the methods that you can use to separate solid-solid mixtures

Physics
1 answer:
kompoz [17]3 years ago
5 0

Handpicking and winowing

You might be interested in
Freight car A with a gross weight of 200,000 lbs is moving along the horizontal track in a switching yard at 4 mi/hr. Freight ca
zhenek [66]

Answer: a) 4.7 mi/hr.  b) 86,500 lbs. mi²/Hr²

Explanation:

As in any collision, under the assumption that no external forces exist during the very small collision time, momentum must be conserved.

If the collision is fully inelastic, both masses continue coupled each other as a single mass, with a single speed.

So, we can write the following:

p₁ = p₂ ⇒m₁.v₁ + m₂.v₂ = (m₁ + m₂). vf

Replacing by the values, and solving for vf, we get:

vf = (200,000 lbs. 4 mi/hr + 100,000 lbs. 6 mi/hr) / 300,000 lbs = 4.7 mi/hr

If the track is horizontal, this means that thre is no change in gravitational potential energy, so any loss of energy must be kinetic energy.

Before the collision, the total kinetic energy of the system was the following:

K₁ = 1/2 (m₁.v₁² + m₂.v₂²) = 3,400,000 lbs. mi² / hr²

After the collision, total kinetic energy is as follows:

K₂ = 1/2 ((m₁ + m₂) vf²) = 3,313,500 lbs. mi²/hr²

So we have an Energy loss, equal to the difference between initial kinetic energy and final kinetic energy, as follows:

DE = K₁ - K₂ = 86,500 lbs. mi² / hr²

This loss is due to the impact, and is represented by the work done by friction forces (internal) during the impact.

8 0
3 years ago
1. If a car travels 400m in 20 seconds how fast is it going?
Marrrta [24]

Answer:

1) 20 m/s

2) 5 m/s

3) 2 m/s

4) 395,000m/9000s

5) 16 km/0.25h

Explanation:

i dunno

5 0
3 years ago
A ball having a mass of 200 g is released from rest at a height of 400 mm above a very large fixed metal surface. If the ball re
AysviL [449]

Answer:

0.9

Explanation:

h = 400 mm, h' = 325 mm

Let the coefficient of restitution be e.

h' = e^2 x h

325 = e^2 x 400

e^2 = 0.8125

e = 0.9

5 0
3 years ago
Which is an example of a physical change
mote1985 [20]
Water boiling is an example of a physical change. The rest are chemical changes.  
Hope that helps!!
6 0
3 years ago
If the frequency of a given wave increases,what happens to the wavelength?
Greeley [361]
It shortens so that the tips reach faster
8 0
3 years ago
Read 2 more answers
Other questions:
  • The process in which acids and bases react so that the properties of both are lost to form water and a salt is called __________
    6·1 answer
  • Two microwave signals of nearly equal wavelengths can generate a beat frequency if both are directed onto the same microwave det
    9·2 answers
  • A magnet is
    5·1 answer
  • Modern commercial airliners are largely made of aluminum, a light and strong metal. But the fact that aluminum is cheap enough t
    5·1 answer
  • The speed of a cruise ship is 50,000 m/hr. How fast is it moving in m/s?
    15·1 answer
  • Anyone know how to do this
    7·1 answer
  • Given that the initial rate constant is 0.0191 s-1 at an initial temperature of 24°C, what would the rate constant be at a tempe
    15·1 answer
  • If mechanical energy is conserved in a system the energy at any point in time can be in the form of
    11·1 answer
  • Decide if each description below is an example of a change caused by energy. From the drop-down menu, choose "IS" if it is an ex
    7·1 answer
  • You want to build a snowman, so you accelerate a 2kg snowball across your yard at a rate of 0.5m/s2. Calculate the amount of for
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!