Answer:
F = 2.26 × 10⁻³ N
Explanation:
given,
length of rod = 11 cm
charge = 19 nC
linear charge density = 3.9 x 10⁻⁷ C/m
electric force at 2 cm away.
F = E q
integrating from 0.02 to 0.02 + L
F = 2.26 × 10⁻³ N
Wave speed = frequency * wavelength
Wave speed = 4 * 25
Wave speed = 100 m/s
Energy or heat can be calculated in terms of the mass, temperature, and specific heat of a substance. This is given by the equation:
U = mCpΔT = mCp(Tf-Ti)
where:
m = mass
Cp = specific heat
ΔT = temperature difference
For this problem, you need to get the specific heat of granite which can be found in reliable chemistry/engineering books or websites. According to Engineering Toolbox website, the Cp of granite is 790 J/(kg-°C).
U = 17 kg (790 J/(kg-°C)) (21-45) = - 322,320 Joules
*Note: the sign is negative because energy was released
Answer:
313.6N
Explanation:
Given parameters;
Mass of the body = 50kg
Coefficient of friction = 0.64
Acceleration due to gravity = 9.81m/s²
Unknown:
Minimum force needed to move the body = ?
Solution:
To move this body, the minimum force must overcome the frictional force. So, the value of force that equals to that of the frictional force will set the body in motion.
Frictional force = Umg
U is the coefficient of friction
m is the mass
g is the acceleration due to gravity
Now insert the parameters and solve;
Frictional force = 0.64 x 50 x 9.8 = 313.6N
Answer:
c. Closing the valve stops the flow of water, but opening a switch stops the flow of charges.
Explanation:
I just took the test on edge. Hope this helps and sorry if I'm late :)