Answer:
Explanation:
Increases. The force of gravity is distance dependent. Therefore, a smaller 'r' value will result in a larger force. Net force is proportional to the acceleration, so the planet will increase its speed.
Answer:
a) x = 8.8 cm * cos (9.52 rad/s * t)
b) x = 8.45 cm
Explanation:
This is a Simple Harmonic Motion, and most Simple Harmonic Motion equations start from the equilibrium point. In this question however, we are starting from the max displacement the equations, and thus, it ought to be different.
From the question, we are given that
A = 8.8 cm = 0.088 m
t = 0.66 s
Now, we need to find the angular speed w, such that
w = 2π/T
w = (2 * 3.142) / 0.66
w = 6.284 / 0.66
w = 9.52 rad/s
The displacement equation of Simple Harmonic Motion is usually given as
x = A*sin(w*t)
But then, the equation starts from the equilibrium point at 0 sec, i.e x = 0 m
When you have to start from the max displacement, then the equation would be
x = A*cos(w*t).
So when t = 0 the cos(0) = 1, and then x = A which is max displacement.
Thus, the equation is
x = 8.8 cm * cos (9.52 rad/s * t)
At t = 1.7 s,
x = 8.8 cos (9.52 * 1.7)
x = 8.8 cos (16.184)
x = -8.45 cm
Answer:
question given →What is Volt?
answer →The volt (symbol: V) is the derived unit for electric potential, electric potential difference (voltage), and electromotive force. It is named after the Italian physicist Alessandro Volta.
important meaning:
volt→a unit for measuring electrical force.
वोल्ट→ विद्युत शक्ति को मापने की इकाई|
hope it helps please mark me as brainliest
Let us first calculate the average speed of David,
Av speed = Distance traveled/ Time taken
We have, distance = 70 miles
Time = 
hours = 1.75 hours
Av speed = 
= 40 miles/hour
Another 120 miles will be traveled in time, t = 120/40 = 3 hours
Answer:
874.2 KJ
Explanation:
Ethyl alcohol boiling point = 78oC, freezing point = -114oC heat of vaporization = 879 kJ/kg heat of fusion = 109kJ/Kg specific heat capacity (c) of ethyl alcohol = 2,43KJ/Kg.k
calculating each heat drawn singly
Quantity loss due vaporization = m × Lv where m is mass in kg and Lv is the heat of vaporization
Quantity of heat loss due to fusion = m × Lf ( heat of fusion)
Quantity of heat loss due to cooling from 78oc to -114 = m × c × ΔT 9 (change in Temperature)
Quantity of heat removed due to vaporization = 0.601 ×879 = 528.279 KJ
Quantity of heat lost due to cooling from 78oc to -114oc = mcΔT= 0.601 × 2.43 × ( 78 - (-114)) = 0.601 ×2.43 × 192 = 280.4 kJ
Quantity of heat lost due to fusion during freezing = 0.601 × 109 = 65.509 KJ
Total heat removed = sum of the each quantity of heat removed from the gaseous ethyl alcohol = 528.279 + 280.4 + 65.509 = 874.2 KJ
