Answer: 288.4 pc
Explanation:
The apparent magnitude and absolute magnitude of star are related as:
m = M +5 log d - 5
where, m is the apparent magnitude from the Earth and M is the absolute magnitude (The magnitude of star if it is at 10 pc distance away from Earth) of the star. Then, d is the actual distance of star in parsecs (pc).
m = 6.5
M = - 0.8
d = ?
⇒ 6.5 = -0.8 + 5 log d - 5
⇒ 12.3 = 5 log d
⇒ 2.46 = log d
⇒ d = anti-log (2.46) = 288.4 pc
Hence, the star is 288.4 pc away from Earth.
Answer:
V_infinty=98.772 m/s
Explanation:
complete question is:
The following problem assume an inviscid, incompressible flow. Also, standard sea level density and pressure are 1.23kg/m3(0.002377slug/ft3) and 1.01imes105N/m2(2116lb/ft2), respectively. A Pitot tube on an airplane flying at standard sea level reads 1.07imes105N/m2. What is the velocity of the airplane?
<u>solution:</u>
<u>given:</u>
<em>p_o=1.07*10^5 N/m^2</em>
<em>ρ_infinity=1.23 kg/m^2</em>
<em>p_infinity=1.01*10^5 N/m^2</em>
p_o=p_infinity+(1/2)*(ρ_infinity)*V_infinty^2
V_infinty^2=9756.097
V_infinty=98.772 m/s
Answer:
A
Explanation:
The others are only when the poles are the same as in south pole and south pole however north pole and south pole do connect cause they are oppisites
Answer:
Approximately .
Explanation:
The formula for the kinetic energy of an object is:
,
where
- is the mass of that object, and
- is the speed of that object.
Important: Joule () is the standard unit for energy. The formula for requires two inputs: mass and speed. The standard unit of mass is while the standard unit for speed is . If both inputs are in standard units, then the output (kinetic energy) will also be in the standard unit (that is: joules,
Convert the unit of the arrow's mass to standard unit:
.
Initial of this arrow:
.
That's the same as the energy output of this bow. Hence, the efficiency of energy transfer will be:
.
Answer: B, increase the rate at which he turns the crank
Explanation: i got it right