the blank is responsible for determining the frequency of vibration of the air column in the tube within a wind instrument.

A 1020 kg boat is traveling at 110 km/h when its engine is shut off. The magnitude of the frictional force k between boat and wa

nordsb [41]

Answer: 94 seconds

Explanation:

An exact solution will require calculus, since the acceleration is not constant. 

M*dV/dt = -fk = -75V dV/V = -(75/M)dt  

Since you have separated variables to opposite sides, the differential equation is easily integrated.   

Therefore,

V2/V1 = -ln2 = (-75/M)T where T is the time interval.  

Then we have that,

T= (M/75)*ln2 = (1020/75)*0.693 = 94 seconds

4 0

3 years ago

A solid spherical ball and a hollow spherical ball made out of the same material are released from rest at the top of a ramp. Th

ziro4ka [17]

Answer:

1 ) Distribution of mass within the ball

2 ) Height of the ramp

Explanation:

Acceleration of a rolling body down an inclined plane is given by the following formula

a = g sinθ / ( 1 + k² / R² )

k is radius of gyration , R is radius of the spherical object ,

when acceleration is more , velocity will also be more .

for objects in which masses are lying in the periphery like in hollow sphere , the value of k²/R² will be high so denominator of the expression will be high so acceleration will be less , hence velocity on reaching the bottom will be less.

On mass of the ball , velocity will not depend .

If height is increased , ball will have acceleration for greater time so velocity will be high.

On radius it will not depend because , radius r and k increases proportionately.

7 0

4 years ago

HELP!!!! PLEASE (and there will be more)

Alexus [3.1K]

Answer:

i wanna say tranverse if not surface

Explanation:

6 0

3 years ago

Read 2 more answers

I need help with question 8 and 9

Wewaii [24]

8) The height of the shelf is 2.04 m

9) The gravitational potential energy is 100 J

Explanation:

8)

The gravitational potential energy of an object is given by:

$PE=mgh$

where

m is the mass of the object

g is the acceleration of gravity

h is the heigth of the object, relative to the ground

For the object in this problem, we have

m = 10 kg

$g=9.8 m/s^2$

And we know that

PE = 200 J

Therefore we can re-arrange the formula to solve for h, the heigth of the object:

$h=\frac{PE}{mg}=\frac{200}{(10)(9.8)}=2.04 m$

9)

As before, the gravitational potential energy of the object is given by:

$PE=mgh$

where in this case, we have:

m = 10 kg is the mass of the object

h = 2.04 m is the height of the object from the ground

While in this case, the acceleration of gravity on this planet is

$g=4.9 m/s^2$

Substituting,

$PE=(10)(4.9)(2.04)=100 J$

Learn more about potential energy:

brainly.com/question/1198647

brainly.com/question/10770261

#LearnwithBrainly

7 0

4 years ago

How is a scientific law different than a scientific theory ?

OLga [1]

Answer: scientific law is the description of an observed phenomenon. It doesn't explain why the phenomenon exists or what causes it. The explanation of a phenomenon is called a scientific theory

hope this helps

plz mark brainleist

3 0

4 years ago