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katrin2010 [14]
3 years ago
13

What happens to kinetic energy of a snowball as it rolls across the lawn and gains mass

Physics
2 answers:
leva [86]3 years ago
7 0
If you are not considering friction, the energy must be the same, therefore, kinetic energy will be constant.
Naya [18.7K]3 years ago
3 0

If an object whose mass is growing keeps the same, unchanged
kinetic energy, then its motion must slow down, because

        Kinetic Energy = (1/2) (mass) (speed)² .
  
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When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV1.4=C
Alex_Xolod [135]

Answer:

26.466cm³/min

Explanation:

Given:

Volume 'V'= 320cm³

P= 95kPa

dP/dt = -11 kPa/minute

pressure P and volume V are related by the equation

PV^{1.4}=C

we need to find dV/dt, so we will differentiate the above equation

V^{1.4} \frac{dP}{dt} + P\frac{d[V^{1.4} ]}{dt}  = \frac{d[C]}{dt}

\frac{dP}{dt} V^{1.4} + P(1.4)V^{0.4} \frac{dV}{dt} =0

lets solve for dV/dt, we will have

\frac{dV}{dt} =\frac{-\frac{dP}{dt} V^{1.4} }{P(1.4)V^{0.4} } \\\frac{dV}{dt} =- \frac{-\frac{dP}{dt} V}{P(1.4)}

\frac{dV}{dt} = -\frac{(-11 ) 320}{95(1.4)}  (plugged in all the values at the instant)

\frac{dV}{dt} = 26.466

Therefore, the volume increasing at the rate of 26.466cm³/min at this instant

6 0
3 years ago
Read 2 more answers
a car of mass 1,000 kilograms is moving initially at the speed of 22 meters/second. when the brakes are applied, it takes the ca
Evgen [1.6K]

It i believe it would be 7.3 × 10∧3.

correct me if im wrong

5 0
3 years ago
What comes into your mind when you hear the words momentum
zloy xaker [14]

Answer:

In my mind when I hear the word momentum it comes that it is the product of mass and velocity.

4 0
2 years ago
A bar on a hinge starts from rest and rotates with an angular acceleration α = 15+4t, where α is in rad/s2 and t is in seconds.
Arisa [49]

Answer:

230.53°

Explanation:

α = angle in rad / t^2

t =2mins = 2 × 60 = 120sec.

α = angle in rad / 2^2

α = angle in rad / 16

15+4(2) = angle in rad /4

23 = angle/4

23× 4 = angle in radian

92 = angle in radian

But π rad = 180°

1 rad = 180 /π

Therefore

92 rad = 92 ×180/π = 5270.53°

This value is far more so we subtract from 360° continuously till we get a value less than 360°

5270.53- (360×14) =5270.53- 5040

230.53°

3 0
3 years ago
HEY CAN ANYONE ANSA DIS!!!
Marizza181 [45]

Answer:

C. 5.35 × 10^-5

Explanation:

5.35 × 0.00001 = 0.0000535

Hope this helped!

8 0
3 years ago
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