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Vesnalui [34]
3 years ago
9

What state has the longest coast

Physics
1 answer:
adelina 88 [10]3 years ago
5 0
Coastline Of Alaska
Alaska has 33,904 miles of coastline, the longest in the United States.
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A 7.0 kg bowling ball has a moment of inertia of 2.8x10-2 kg m2, and a radius of 0.10 m. If it rolls down the lane at an angular
slega [8]

Hi there!

Angular momentum is equivalent to:

\large\boxed{L = I\omega}

L = angular momentum (kgm²/s)

I = moment of inertia (kgm²)

ω = angular velocity (rad/sec)

Plug in the given values for moment of inertia and angular speed:

L = (0.028)(40) = \boxed{1.12 kgm^2/s}

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2 years ago
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3 years ago
the record for a ski jump is 180 m set in 1989. Assume the jumper comes off the end of the ski jump horizontally and falls 90 m
Mashutka [201]
Let's write the equations of motion on both x- (horizontal) and y- (vertical) axis. On the x-axis, it's a uniform motion with constant velocity vx. On the y-axis, it is a uniformly accelerated motion with initial height h=90 m and acceleration of g=9.81 m/s^2 pointing down (so with a negative sign):
S_x(t)=v_x t
S_y(t)=h- \frac{1}{2} gt^2

First, let's find the time at which the jumper reaches the ground. This happens when Sy(t)=0:
0=h- \frac{1}{2} g t^2
and so 
t= \sqrt{ \frac{2h}{g} }= \sqrt{ \frac{2\cdot 90m}{9.81 m/s^2} }=4.28 s

Then, we can find the horizontal speed. In fact, we know that at the time t=4.28 s, when the jumper reached the ground, he covered exactly 180 m, so Sx=180 m. Using this into the law of motion in x, we find
v_x= \frac{S_x}{t} = \frac{180 m}{4.28 s} =42 m/s

8 0
3 years ago
How far will a bus travel if it averages a speed of 65 km/h for 7 hours?
otez555 [7]

Answer:

the bus travles 65x7=455 km

Explanation:

hope this helps you

7 0
3 years ago
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What is the potential difference, va - vb, between points a and b?
Alex Ar [27]
The potential at point a - the potential at point b
3 0
3 years ago
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