Answer:
Explanation:
The equation for this is
where f is the frequency, v is the velocity, and lambda is the wavelength. Filling in:
and
which means that
the wavelength is 1.37 m, rounded to the correct number of significant digits.
<span>14 m/s
Assuming that all of the energy stored in the spring is transferred to dart, we have 2 equations to take into consideration.
1. How much energy is stored in the spring?
2. How fast will the dart travel with that amount of energy.
As for the energy stored, that's a simple matter of multiplication. So:
20 N * 0.05 m = 1 Nm = 1 J
For the second part, the energy of a moving object is expressed as
KE = 0.5 mv^2
where
KE = Kinetic energy
m = mass
v = velocity
Since we now know the energy (in Joules) and mass of the dart, we can substitute the known values and solve for v. So
KE = 0.5 mv^2
1 J = 0.5 0.010 kg * v^2
1 kg*m^2/s^2 = 0.005 kg * v^2
200 m^2/s^2 = v^2
14.14213562 m/s = v
So the dart will have a velocity of 14 m/s after rounding to 2 significant figures.</span>
The force of gravitational attraction between the two masses is 1.53×10⁻⁸N.
Newton's law of gravitation gives an expression to determine the magnitude of the attractive force between two masses m₁ and m₂ placed at a distance <em>r</em> apart from each other.
The force <em>F</em> is given by,
Substitute 6.67×10⁻¹¹Nm²kg⁻²² for <em>G, </em>the universal gravitational constant, 5 kg for both m₁ and m₂ and 0.33 m for r.
The gravitational force of attraction between the two balls is found to be 1.53×10⁻⁸N.
Answer:
Velocity is commonly now known as the rate of change from where an object left it starting position
Hope it helped!!
Explanation: