3 years ago

How did settlers changed the great plains?

1 answer:

6 0

They farmed it and got rid of most of the buffalo. They also caused the locust plague from turning up the eggs in the dirt when it was first plowed.

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What impulse occurs when an average force of 7.0 N is exerted on a cart for 2.5 s ?

makkiz [27]

Answer: $1.7\times 10$

Explanation:

Given

Force $F=7 N$

time interval $t=2.5 s$

Impulse is given by $=Force \times time\ interval\ for\ applied\ force$

$Impulse=7\times 2.5=17.5$

For two significant Figure

$Impulse=1.7\times 10$

7 0

3 years ago

It takes 6 sec for a stone to fall the the bottom of a mineshaft. calculate the

Stels [109]

Ok so this is simple projectile motion problem.

if we have an object falling in free fall it is subject to gravity of -9.80m/s^2

so it says it takes 6 sec to fall and we know initial velocity was zero so we know that h=vt+1/2gt^2 so we get h=0+1/2*9.80*6^2 = 176.4m

so solving for final speed we get KE=PE = 1/2mv^2=mgh = 1/2v^2=gh so
v=sqrt(2*g*h) = sqrt(2*9.8*176.4m) = 58.8m/s final speed when it hits the ground

hope this helps you! Thanks!!

8 0

3 years ago

Magnectic striping is evidence of ?

wolverine [178]

Answer: Magnetizim

Explanation: Magnetic Atoms collide creating magnetizim

5 0

3 years ago

A scooter is accelerated from rest at the rate of 8m/s

algol13

Explanation:

time=Distance/speed

t=32/8

t=4 seconds

8 0

3 years ago

this refers to the process of manufacturing that introduced powered machinery to the production of goods

Sidana [21]

This had to do with gain power and trade inequality business

5 0

3 years ago