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3 years ago

How does the mass of an electron compare to the mass of a proton?

Physics

1 answer:

harina [27]3 years ago

6 0

Answer:

The mass of an electron is only about 1/2000 the mass of a proton.

Explanation:

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If the potential energy of the system is zero, the force on the object is zero. When air resistance is taken into account, a bal

timama [110]

Answer:

Explanation:

Considering it to be True or False Statements

(a)True ,

when Potential Energy of the system is zero then force on the object is zero

$F=-\frac{\mathrm{d} U}{\mathrm{d} x}$

$F=0$

(b)True

When ball is thrown upward it faces air resistance of greater magnitude because of the high speed of ball. while on returning the speed of ball gradually increase therefore it take more time to reach same spot

(c)True

Change in gravitational Potential Energy of two balls will be different as gravitational Potential Energy depends on the distance of object from datum.

Also Potential Energy can also be negative as it depends on reference

(d)False

if Force on object is zero then Potential Energy is constant not zero

$F=0$

i.e. $\frac{\mathrm{d} U}{\mathrm{d} x}=0$

$U=constant$

3 0

4 years ago

A marble and a basketball are rolling toward you at the same velocity. If the same amount of force is used to stop both objects,

Ira Lisetskai [31]

Answer:

The amount of time needed to stop the marble is much less than the amount of time needed to stop the basketball.

Explanation:

To explain this question we can use the equation:

Change in momentum = Force x Time

Where momentum = mass x Velocity

In the case of the basketball, it has a much larger mass than the marble, meaning it has much more momentum than the marble. This means that with the same amount of force, it will need much more time to stop.

Likewise, the marble has less mass than the basketball meaning it will have less momentum. This means that with the same amount of force, it will require less time to stop.

Logically this also makes sense if we think about it in a real life scenario. If we try to stop a marble with our finger, we can stop it much faster then if we try to stop a basketball with our finger because of the difference in mass between the two objects, therefore the marble will require much less time to be stopped than the basketball.

Hope this helped!

6 0

3 years ago

An ice skater is spinning at 6.00 rev/s with his moment of inertia being 0.400 kg/m2. Calculate his new moment of inertia if he

labwork [276]

Answer:

New moment of inertia will be $I=1.92kgm^2$

Explanation:

It is given initially angular velocity $\omega =6rev/sec=6\times 2\pi =37.68rad/sec$

Moment of inertia $I=0.4kgm^2$

Angular momentum is equal to $L=I\omega =37.68\times 0.4=15.072kgm^2/sec$

Now angular velocity is decreases to $\omega =1.25rev/sec=1.25\times 2\times 3.14=7.85rad/sec$

As we know that angular momentum is conserved

So $15.072=I\times 7.85$

$I=1.92kgm^2$

So new moment of inertia will be $I=1.92kgm^2$

4 0

3 years ago

Let's say you have two tuning forks which are supposed to produce the same frequency, 512 Hz. One is of good quality, but the ot

solong [7]

Answer:

= 2 beats per seconds

Explanation:

From |f -f'| = modulus of the difference between the frequency given.

f = 510Hz and f' = 512Hz

Difference between the frequency will give us the number of beat per seconds.

i.e 2 beats per seconds

These also shows how to get the period of the tuning forks.

7 0

3 years ago

A homing pigeon starts from rest and accelerates uniformly at +4.00 m/s squared for 10.0 seconds. What is its velocity after the

zavuch27 [327]

' +4 m/s² ' means that the pigeon's speed is 4 m/s greater every second.

Starting from zero speed, after 10 seconds, its speed is

(10 x 4m/s) = 40 m/s.

We can't say anything about its velocity, because we have
no information regarding the direction of its flight.

5 0

4 years ago