Answer:
7.8x10-12N
Explanation:
We know that
Magnetic force = F = qVB
And
Also Kinetic energy K.E is
E = (1/2)mV²
So making v subject
V = √(2E / m)
And
E = KE = 2MeV
= 2 × 106 eV
= 2 × 106 × 1.6 × 10–19 J
= 3.2 × 10–13 J
And then
V= √2x3.2E-13/1.6E-27
1.9E7m/s
Given that
mass of proton = 1.6 × 10–27 kg,
Magnetic field strength B = 2.5 T.
So F= qBv sinစ
=
So F = 1.6 × 10–19 × 2.5 × 1.9 x10^7 x sin 90°
= 7.8 x 10^-12N
The strength of the gravitational force between two objects depends on two<span> factors, mass and distance. the </span>force<span> of </span>gravity<span> the masses exert on each other. If one of the masses is doubled, the </span>force<span> of </span>gravity between<span> the </span>objects<span> is doubled. thats what i got..</span>
Answer:
The force on he object can cause an object to move or speed up. It can also make it stop or change direction.
Explanation:
Answer:
The police car is moving at 41.24 m/s.
Explanation:
To find the speed of the police car we need to use the Doppler equation:
Where:
v: is the speed of the sound = 343 m/s
: is the speed of the receiver = 12 m/s
: is the speed of the source =?
f: is the observed frequency = 959 Hz
f₀: is the emitted frequency = 1038 Hz
Both terms are positive in the fraction because the velocity of the sound is in the opposite direction to both velocities of the police car and the other car.
By solving the above equation for
we have:
Therefore, the police car is moving at 41.24 m/s.
I hope it helps you!
Answer:

Explanation:
The electrostatic force between two electrons is given by:

where
is the Coulomb's constant
is the electron charge
r is the distance between the two electrons
In this problem, we know F=4.0 N, so we can re-arrange the equation to calculate r:
