Answer: the radius of the satellite's orbit is r = 8.78×10⁷m
Explanation:
given the time period, T= 3days
converting the time in days to seconds is given as;
time, T=(3*24*60*60) sec
T=259200 sec
from the force relation;
mv²/r = Gm×M/r²
v²=G×M/r ---------------(1)
and
V=2pi×r/T
V²=4×pi²×r²/T²
====>
from equation (1)
, we have
4×pi²×r²/T²=G×M/r
this becomes; 4×pi²×r³/T² = G×M
r³ = G×M×T²/(4pi²)
r³ = 6.67×10⁻¹¹×(5.97×10²⁴)×(259200)²/(4pi²)
==> r=8.78×10⁷m
radius of the orbit, r=8.78×10⁷ m
Answer:
Explanation:
given,
moles of air compressed, n = 1.70 mol
initial temperature, T₁ = 390 K
Power supply by the compressor, P = 7.5 kW
Heat removed = 1.3 kW
Angular frequency of the compressor, f = 110 rpm = 110/60 = 1.833 rps.
Time of compression = time of the hay revolution
=
=
=
=0.273 s
Using first law of thermodynamics
U = Q - W
now,
Power supplied 
= 7.5 kW
heat removed 
= 1.3 kW
now,
we know,
C_v for air = 5 cal/° mol
= 5 x 4.186 J/mol°C = 20.93 J/mol°C
now,
the temperature change per compression stroke is equal to 47.57°C.
Answer:
34 kg is the answer to the question
The S.I unit of velocity is m/s and since it's velocity it needs to be in a particular direction, therefore most appropriate answer is :
B. She is running west at 2.4 m/s
Answer: The correct answer is (a).
Explanation:
The potential energy is due to the position of the object.
The kinetic energy is due to the motion of the object.
In the case of a basketball sitting on a shelf, the basketball posses the potential energy due to some height.
In the case of a dog running across a field, a dog has kinetic energy due to its motion.
In a case of a bowling ball rolling down a lane, there is kinetic energy due to the motion of the bowling ball.
In the case of a teenager riding their bike, there is kinetic energy due to the motion of the bike.
Therefore, the correct answer is (a).
