Answer:
Yellow dwarfs are small, main sequence stars. The Sun is a yellow dwarf. A red dwarf is a small, cool, very faint, main sequence star whose surface temperature is under about 4,000 K. Red dwarfs are the most common type of star. Proxima Centauri is a red dwarf.
Explanation:
Answer:
The tension in the rope is 49.66 N.
Explanation:
Given that,
Mass of bucket m= 23.0 kg
Diameter = 0.300 m
Mass of rope M= 13.0 kg
Height = 10.5 m
Suppose we need to find the tension in the rope while the bucket is falling.
We need to calculate the acceleration
Using balance equation
..(I)
We need to calculate the tension in the rope
Using formula of tension
....(II)
Put the value of T in the equation (I)
Put the value into the formula
Now, put the value of a in equation (II)
Hence, The tension in the rope is 49.66 N.
Insulators are materials that inhibit the flow of electrical current. The opposite of conductors, which allow electric particles to flow freely, insulators are implemented in household items and electrical circuits as protection. Thermal insulation is similar, but it constricts the flow of heat rather than electricity.
The normal reaction of the boy of mass 70 kg is 826 N.
Let us understand about normal reaction.
The force exerted by a surface on an object in contact with it which prevents the object from passing through the surface is called Normal reaction.
To calculate the normal reaction, we use the formula below.
Formula:
N = mg+m(v-u)/t.......... Equation 1
Where:
N = Normal reaction
m = Mass of the person
g = Acceleration due to gravity
v = Final Velocity
u = Initial velocity
t = Time
From the question,
Given:
m = 70 kg
v = 4 m/s
u = 0 m/s
t = 2 s
g = 9.8 m/s²
Substitute these values into equation 1
N = (70×9.8)+70(4-0)/2
N = 686+140
N = 826 N
Hence, the normal reaction of the boy is 826 N.
Learn more about normal reaction here: brainly.com/question/28788588
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Answer:
the missile approaches the second ship at 0.750c. Describe how the ships are moving with respect to one another.
Explanation: