Answer:
Explanation:
Allison can measure the mass of the rock by using a scale. An electronic beam balance will be able to give her the mass of the rock to a fairly accurate degree.
To go about measuring the volume of the rock, an indirect approach has to be adopted since the rock is not regular in shape. Allison would have to adopt a principle that explains that the volume a solid body displaces when immersed in a pool of liquid, is directly equal to the volume of the solid itself.
This means that if the stone is placed in a beaker of water containing an already measured volume of water, the increase in the volume of the water when the stone is immersed is equivalent to the volume of the stone.
I think the correct answer from the choices listed above is option A. <span>The equation for density is mass divided by volume. An increase in density can result from all of the following except </span><span>a decrease in mass with an increase in volume.</span>
Answer:
The combined mass of the two stars is 2.9417 solar masses.
Explanation:
The mathematical expression for Kepler's third law is;
=
Where: P is the period in days, a is the semimajor axis in AU, is the mass of the first star, is the mass of the second star and k is the Gaussian gravitational constant.
Given that;
P = 10 years = 3670 days (including two leap years)
a = 6.67 AU
k = 0.01720209895 rad
=
The sum of the masses of the two star can be determined by;
=
=
=
= 2.9417 solar masses
Thus the combined mass of the two star is 2.9417 solar masses.
Answer:
H = 8.45 m
Explanation:
Given that,
Angle of projection,
The initial velocity of the ball, u = 20 m/s
We need to find the maximum height reached by the ball. The formula for the maximum height is given by :
So, the maximum height reached by the ball is 8.45 m.