PHYSICS HIGH SCHOOL

Which types of electromagnetic waves have higher frequencies than the waves that make up ultraviolet light? Check all that apply. -radio waves
-infrared light
-microwaves
-gamma rays
-visible light
-X-rays

Answers

Answer 1
Answer: On this list, 'gamma-'s and 'X-'s are the ones.
Answer 2
Answer:

its gamma rays and x-rays they are the only two out of my knowledge.

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You mix two clear solutions , instantly your see a bright yellow precipitate form. What type of reaction did your just observe
In what way does varying the length of the string change the vibration
How could you increase the gravitational potential energy of an object without changing its mass and gravity?A. Make the object largerB. Raise the object farther off the groundC. Lower the object towards the groundD. Allow the object to roll on the ground​
Your boss asks you to compare two sound waves and determine which has a higher frequency. Wave A has a period o 4/100 second and Wave B has a period of 1/7 second. What would you tell your boss? A. Wave A has the higher frequency. It's frequency is 4 Hz B. Wave A has the higher frequency. It's frequency is 25 Hz C. Wave B has the higher frequency. It's frequency is 42 Hz D. Wave B has the higher frequency. It's frequency is 7 Hz
What is the total displacement of a bee that flies 2 meters east, 5 meters north, and 3 meters east? explain how you did it

A ball is at rest at the top of a hill. It rolls down the hill. At the bottom of the hill the ball hits a wall and stops. Which energy changes occur? A) Gravitational potential energy, internal energy, kinetic energy B) Gravitational potential energy, kinetic energy, internal energy C) Kinetic energy, gravitational potential energy, internal energy D) Kinetic energy, internal energy, gravitational potential energy

Answers

Final answer:

The correct answer is C) Kinetic energy, gravitational potential energy, internal energy.

Explanation:

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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A measurement that has both magnitude and direction

Answers

A measurementthat both magnitude and direction is a vector quantity. An example of this is amoving car. The car exerts force due to its thrust and weight that runs in it. Thiswill give us the magnitude of the car. The resulting motion of the car in termsof displacement, velocity and acceleration that determines its direction makesit a vector quantity. On the other hand, a measurement that has only magnitude isa scalar quantity. The energy exerted by the engine of the car is a scalarquantity.

What is the gravitational force acting on a 70.0 kg object standing on the earth's surface ?

Answers

g( gravitational acceleration)=-9.81 m/s^2
m(mass) = 70.0 kg

According to Newton's second law of motion:

"F=ma"

Force is equal mass per acceleration therefore

W=mg
This is because weigth is the force of gravity acting in a body and "a" is replaced by "g" because "g"
is gravitational acceleration

Therefore:

W= mg
W= (70.0 kg) (-9.81m/s^2)
W= -686.7 N

* The "N" means newton which is (kg* m/s^2)

Final answer:

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.

Explanation:

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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A circus performer is shot out of a cannon at a 50° angle. He reaches a height of 25m. What was the initial velocity?a. How long will he fly before he hits the safety net set at ground level with a hole underneath it. (The circus wanted it to look like he was going to hit the ground and then he bounces, for the thrill effect)

Answers

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

Validity is __________.a. concerned with the relationships of random error with systematic error. b. equal to the true score plus the systematic error. c. equal to the true score plus systematic error minus random error. d. concerned with the extent to which differences in scores reflect true differences in the characteristic. e. concerned with the extent to which differences in scores reflect instability in the measurements.

Answers

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.

Which is an IUPAC name for a covalent compound

Answers

In naming covalent compound (binary) based in IUPAC naming, we have 4 rules to be followed:

1. The first element of the formula will use the normal name of the given element. for example: CO2 ( Carbon Dioxide), Carbon is the element name of the first element of the formula.

2. The second element is named as if they are treated like an anion but put in mind that these are no ions in a covalent compound but we put -ide on the second element as if it is an anion.

3. Prefixes are used to indicate the number of atom of the elements in the compound. for example: mono- 1 atom, di- 2atoms, tri- 3 atoms and etc

4. Prefix "mono"is never used in naming the first element. For example: Carbon dioxide, there should be no monocarbon dioxide.

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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Which of these follows from Newton's laws about the energy of a moving object? A)The total mechanical energy of an object is always constant. B)The kinetic energy of an object remains the same if friction is absent. C)The mechanical energy remains the same if there are only conservative forces acting. D)The total of all forms of energy is always constant.