· A hot, just-minted copper coin is placed in 101 g of water to cool. The water

Does the eruption from a volcano represent force

kkurt [141]

Answer:

Yes, because of the force of gas exploding the volcano from pressure is a force.

6 0

3 years ago

Which changes in an electric motor will make the motor stronger? Check all that apply. using a stronger permanent magnet using a

miv72 [106K]

Use stronger magnets
increase current
push magnets closer to coil
adding more sets of coils

4 0

3 years ago

Read 2 more answers

Blake stands in a canoe in the middle of a lake. The canoe is stationary. Blake holds an anchor mass of 15 kg, then throws it we

Inessa05 [86]

The velocity of the canoe is 1.7 m/s.

<h3>What is momentum?</h3>

Momentum in physics is the products of mass and velocity. Now we have to find momentum with the formula; p = mv

a) Initial momentum = (15)8 m/s + 135 = 255 Kgms-1

b) Since momentum is conserved, the total momentum after throwing the anchor is still 255 Kgms-1

c) The final velocity of the boat is obtained from;

255 Kgms-1 = (15Kg + 135 Kg) v

v = 255 Kgms-1/(15Kg + 135 Kg)

v = 1.7 m/s

Learn more about momentum: brainly.com/question/904448

5 0

2 years ago

Read each scenario and then answer the question. Scenario A: 120 J of work is done in 6 s. Scenario B: 160 J of work is done in

Alexeev081 [22]

The power in every scenario is the same. Power is the measurement of the energy transfer over time.

<h3>What is power?</h3>

Power is the measurement of the energy transfer over time. It can be calculated by the formula,

$P = \dfrac Wt$

Where,

$P$ - power

$W$ - work

$t$ - time

In scenario A,

$P = \dfrac {120 }6 = 20 \rm \ W$

In scenario B,

$P = \dfrac {160 }8 = 20 \rm \ W$

In scenario B,

$P = \dfrac {200 }{10} = 20 \rm \ W$

Therefore, the power in every scenario is the same.

Learn more about Power:

brainly.com/question/1618040

4 0

2 years ago

Read 2 more answers

The 2779-m Brooklyn-Battery Tunnel, connecting Brooklyn and Manhattan, is one of the world's longest underwater vehicular tunnel

Marina CMI [18]

For a cylinder that has both ends open resonant frequency is given by the following formula:
$f= \frac{nv}{2L}$
Where n is the resonance node, v is the speed of sound in air and L is the length of a cylinder.
The fundamental frequency is simply the lowest resonant frequency.
We find it by plugging in n=1:
$f_0= \frac{v}{2L}=\frac{343}{2\cdot 2779}=0.062 Hz$
To find what harmonic has to be excited so that it resonates at f>20Hz we simply plug in f=20 Hz and find our n:
$20= \frac{n343}{2\cdot 2779} =n\cdot f_0$
We can see that any resonant frequency is simply a multiple of a base frequency.
Let us find which harmonic resonates with the frequency 20 Hz:
$20=n\cdot f_0\\ n=\frac{20}{0.062}=322.58$
Since n has to be an integer, final answer would be 323.

3 0

3 years ago