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kondaur [170]
3 years ago
7

Which statement is accurate with regard to migration to metropolitan areas from 1995 to 2000?.

Physics
1 answer:
Nataliya [291]3 years ago
3 0
The statement that is accurate with regard to migration to metropolitan areas from 1995 - 2000 was that at least 40% of all ethnic groups changed places.
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Dan is gliding on his skateboard at 2.00 m/s . He suddenly jumps backward off the skateboard, kicking the skateboard forward at
miss Akunina [59]

Answer:

The velocity of Dan is 1.13 m/s.

Explanation:

Given that,

Initial velocity of skateboard and Dan = 2.00 m/s

Velocity of skateboard = 7.00 m/s

Mass of Dan m= 40.0 kg

Mass of skateboard M= 7.00 Kg

Suppose How fast is Dan going as his feet hit the ground?

We need to calculate the initial velocity of Dan

Using conservation of momentum

(m+M)v_{i}=mv_{f}+Mv_{f}

Put the value into the formula

(40.0+7.00)\times2.00=40.0\times v_{i}+7.00\times7.00

v_{i}=\dfrac{(40.0+7.00)\times2.00-7.00\times7.00}{40.0}

v_{i}=1.13\ m/s

Hence, The velocity of Dan is 1.13 m/s.

4 0
3 years ago
The goals of psychology are the same as the goals of science, except that in psychology, the focus is on __________ and ________
Zepler [3.9K]
C. Behavior. . . cognitive processes
3 0
3 years ago
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A heater has resistance of 10 ohms. It operates at 120 volts. a. What is the current through the heater?​
Natali5045456 [20]

Answer:

  I = 12 A

Explanation:

For this exercise we use the relationship that voltage is proportional to the product of current and resistance

           V = I R

            I = V / R

             

let's calculate

            I = 120/10

            I = 12 A

4 0
2 years ago
This image shows flashlight beams reflecting off a mirror from
marysya [2.9K]

Hey I'm working on this test right now, did you ever get the answers?

7 0
3 years ago
Review. One electron collides elastically with a second electron initially at rest. After the collision, the radii of their traj
DochEvi [55]

The energy of the incident electron in keV is 5.51× 10—²² keV.

Capacity or ability to do work is termed energy. Energy exists in various forms. It can be in the form of mechanical, potential, thermal, kinetic, and many other forms. Joules is the SI of the energy. The potential energy of a system is defined as the energy stored due to its position. While kinetic energy is defined as the energy

stored due to its position.

Radius1 of the trajectory = 1.00 cm

Radius2 of the trajectory = 2.4 0 cm

The magnitude of the uniform magnetic field = 0.0440 T

A Uniform magnetic field is perpendicular to the trajectories.

The velocity of the incident electron is,

v =  \frac{eBR}{m}

The energy of the incident electron is,

K =  \frac{1}{2} mv ^{2}

K =  \frac{1}{2} \frac{(eBR)}{m}^{2}

The energy in keV is,

1-kilo electron volt = 1000 electron volts

1 keV = 1000 eV

1 \: eV =  \frac{1}{1000} \:  keV

= \frac{ K}{1000}

=  \frac{eB ^{2} R ^{2} }{2000m}

= 5.51 \times 10 ^{ - 22}  \: keV

Therefore, the energy of the incident electron in keV is 5.51× 10—²² keV.

To know more about electrons, refer to the below link:

brainly.com/question/1255220

#SPJ4

6 0
1 year ago
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