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aleksklad [387]

3 years ago

10

Extrusive Igneous rock has ___________ grain size. I need help on this one

1 answer:

MrRissso [65]3 years ago

8 0

Explanation:

Extrusive rocks may have a few grains that are large enough to see, but most of them will be too small to see individual minerals. ... The individual mineral grains are almost too small to see. Some extrusive rocks cool so quickly that they do not form any grains. Instead, they form a natural glass.

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Explain some similarities and differences between:<br> Magnetism and gravity.

svlad2 [7]

Answer:

Gravity always attracts. Magnetism either attracts or repel. Gravity reacts to mass or space. Magnetism reacts to motion

4 0

3 years ago

Read 2 more answers

How to change the amount of charge to increase the current strength 2 times

olya-2409 [2.1K]

Answer:

Explanation:

well if its an electromagnetic current you would increase the battery voltage basically by using two batteries

5 0

3 years ago

A flywheel of J = 50 kg-m2 initially standing still is subjected to a constant torque. If the angular velocity reaches 20 Hz in

Karolina [17]

Answer:

$\tau = 1256.5\ N.m$

Explanation:

given,

J = 50 kg-m²

frequency, f = 20 Hz

time ,t = 5 s

we know,

angular velocity = 2 π f

ω = 2 π x 20

ω = 125.66 rad/s

now, angular acceleration calculation

$\alpha = \dfrac{\omega_f-\omega_i}{t}$

$\alpha = \dfrac{125.66-0}{5}$

α = 25.13 rad/s²

Torque given to the flywheel.

$\tau = I \alpha$

$\tau = 50\times 25.13$

$\tau = 1256.5\ N.m$

Torque of the given flywheel is equal to $\tau = 1256.5\ N.m$

7 0

4 years ago

Two friends, Barbara and Neil, are out rollerblading. With respect to the ground, Barbara is skating due south at a speed of 3.3

ozzi

Answer:

Answer is invalid make more sense next time please look it up somewhere else or ask somone smart. THere i gave you advice now i get points

Explanation:

8 0

4 years ago

Martin rides his motorcycle at 20 m/s. suddenly he sees a row of stones

Novay_Z [31]

Answer: Yes

Explanation:

Given

Martin initial speed is $u=20\ m/s$

Stones is at 170 m ahead

Deceleration $a=2\ m/s^2$

Using the equation of motion $v^2-u^2=2as$

Insert the values

$0-20^2=2\times (-2)s\\s=\dfrac{400}{4}\\\\s=100\ m$

So, it took 100 m to stop completely. Hence martin will be able to stop in time.

6 0

3 years ago