The technique which is the most useful for measuring the distance to a galaxy located 10 million light-years away is Cepheids
A Cepheid variable is a particular kind of star that pulses radially, varying in diameter and temperature while causing changes in brightness with a clearly discernible steady time and amplitude.
A light-year is defined as the total amount of distance covered by light in a year. It is usually a unit to measure very large distances which usually concerns the Outerspace
A galaxy is a system made up of stars, stellar debris, interstellar gas, dust, and other matter that is gravitationally bound. The name "galaxy" is derived from the Greek word "galaxies," which is an allusion to the Milky Way and literally means "milky."
Learn more about Cepheids here
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Answer:
a) = 3.94 m
b) = 3.15 m
Explanation:
Given
Mass of the block, m = 242 g
Force constant, k = 1.62 kN/m
Compression of the spring, x = 10 cm
Angle of inclination = 60°
a) if we equate the energy at the bottom of the ramp to the energy at a distance d up the ramp, we have
1/2kx² = mgh where, h = dsinΦ
1/2kx² = mgdsinΦ
1/2 * 1.62*10^3 * 0.1² = 0.242 * 9.8 * dsin 60
1/2 * 16.2 = 2.3716 * d sin 60
d sin 60 = 8.1 / 2.3716
0.866 d = 3.415
d = 3.415 / 0.866
d = 3.94 m
b) net force on the block = mgd sin 60 + µ mgd cos 60
8.1 = d[mg sin 60 + µ mg cos 60]
8.1 = d [0.242 * 9.8 * 0.866 + 0.44 * 0.242 * 9.8 * 0.5]
8.1 = d (2.05 + 0.52)
8.1 = 2.57 d
d = 8.1 / 2.57
d = 3.15 m
the answer is B. hope i helped
70kg
1 earth gravity
80 M of height
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54917.2 Joules of energy
Mrs. Stark has 54,917.2 Joules of energy.
Answer:
The bigger the atom the lesser the ability of the atom to hold on to its valence electrons.
Explanation:
Atomic radius can be looked at as the distance between the nucleus and the outermost energy level. As an atom gets bigger, the outer shell gets further and further from the positive nucleus. this means that electrons that are in the outer energy level become less held (attracted) by the nucleus because of distance and shielding of the attractive forces by the electrons in the lower energy levels. This means that as an atom becomes bigger, its ability to hold on to its outer electrons lessens.
