its gamma rays and x-rays they are the only two out of my knowledge.
The correct answer is C) Kinetic energy, gravitational potential energy, internal energy.
When the ball is at the top of the hill, it has gravitational potential energy because of its position. As it rolls down the hill, this potential energy is converted into kinetic energy, which is the energy of motion.
When the ball hits the wall at the bottom of the hill and stops, some of the kinetic energy is transformed into internal energy, which is the energy associated with the motion of particles within the ball.
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The gravitational force acting on a 70.0 kg object on Earth is calculated using the formula w=mg and is equal to 686 N.
The gravitational force acting on a 70.0 kg object standing on the earth's surface can be calculated using the formula for weight (which is essentially the gravitational force on the object): w = mg, where m is the mass of the object and g is the acceleration due to gravity. On Earth, g is approximately 9.8 m/s².
Therefore, the gravitational force (weight) acting on this object can be calculated as follows: w = mg = (70.0 kg)(9.8 m/s²) = 686 N. Thus, the gravitational force on this 70.0 kg object standing on the earth's surface is 686 Newtons. It's important to understand that this force will vary if the object is moved to a location where g is different, like on the moon.
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Answer:
28.9 m/s
4.52 s
Explanation:
Given in the y direction:
s = 25 m
u = U sin 50°
v = 0 m/s
a = -9.8 m/s²
Find: U
v² = u² + 2as
0² = (U sin 50°)² + 2 (-9.8) (25)
U = 28.9 m/s
Given in the y direction:
s = 0 m
u = 28.9 sin 50° = 22.1 m/s
a = -9.8 m/s²
Find: t
s = ut + ½ at²
0 = (22.1) t + ½ (-9.8) t²
t = 4.52 s
Answer: the correct answer is option d.
Explanation:
Validity is concerned with the extent to which differences in scores reflect true differences in the characteristic.
Answer:
d. concerned with the extent to which differences in scores reflect true differences in the characteristic.
Explanation:
Validity is the level of accuracy of a measurement under research or test. A measurement is said to be valid if its result is closely related to real world values. Validity in research shows how sound one's research is. In data it means getting a true representation of the data a researcher is claiming to measure. To measure validity, the measurement must have internal consistency and good test-retest reliability.
Types of validity.
Validity can be content, construct, face and criterion.
An IUPAC name for a covalent compound is ethane. For covalent compounds, IUPAC names are based on the composition and structure of the molecules. Covalent compounds typically consist of nonmetals or a combination of nonmetals and metalloids.
Ethane (C₂H₆) is a covalent compound that consists of two carbon atoms bonded to each other with single bonds, and each carbon atom is also bonded to three hydrogen atoms.
Other examples of IUPAC names for covalent compounds include:
Methane (CH₄)
Propane (C₃H₈)
Ethene (C₂H₄)
Nitrogen dioxide (NO₂)
These names are derived based on the IUPAC rules for naming covalent compounds, which consider the number and types of atoms present in the molecule.
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