Answer:
the answers the correct one is a 4
Explanation:
The centripetal acceleration is by
a = v² / R
angular and linear velocities are related
v = w R
let's substitute
a = w² R
for initial condition
a₀ = w₀² R
suppose the initial angular velocity is wo, suppose the angular velocity doubles
a = (2w₀)² R
a = 4 (w₀² R)
a = 4 a₀
when reviewing the answers the correct one is a
If the 30 N on the rope were pulled straight up, it would offset the force of gravity ( m g = 10 kg * 9.8 N/kg = 98 N) , leaving a net force up from the ground on the sled of 98-30 = 68 N. Since the rope is pulled at the angle of 25o, only part of the force is in the upward direction, (30N)(sin(25) = (30)(.423) = 12.7. So the net force becomes 98 N down offset by 12.7 up or 98-12.7 = 85.3 N. Ah, there it is: C.
Industrial revolution is the reason of human population increase in 1700's and 1800's.
<h3><u>Explanation:</u></h3>
Industrial revolution is the event that took in the 18th and early 19th century in Europe and then to other parts of the world. In this revolution, there was huge implementation of machines and artificial objects in the daily lives which hugely contributed to the development of quality of product, greatly decreased the production time and costing, etc.
This led to increase in luxury in the lives of people and there was widespread change in the mode of living of the people all over the world.
Answer:
forest rual area
Explanation:
because thats where i live
Answer:
Option B
Explanation:
Magnification of Microscope is
Mo= Magnification of objective lens and
Me= magnification of the eyepiece.
Both magnifications( of objective and eyepiece) are inversely proportional to the focal length.
Magnification,
when the focal length is less magnification will be high and when the magnification is the low focal length of the microscope will be more.
Thus. Magnification will increase by decreasing the focal length.
The correct answer is Option B
