PHYSICS HIGH SCHOOL

Help please thanks in advance x Red and violet are at opposite ends of the spectrum of visible light.
Describe two things they have in common and two ways in which they differ. X

Answers

Answer 1
Answer: Difference: red has a higher wavelength than violet

Difference: the waves at the violet end of the spectrum are more damaging to you (e.g. Gamma rays are more harmful than radio waves).

Related Questions

As current flows through a series circuit, it is diminished by the work it performs in the resistance(s). TRUE or FALSE
What component of Star Wars is possible based on our current understanding of physics?
Please help me! In a collision, Kara Less who was traveling at 11 m/s while texting in her 1300 kg car, is struck by another vehicle and finds herself and her phone suddenly moving 2.5 m/s in the opposite direction. What impulse does she experience? SHOW WORKAnswer Choices A. -12,000 B. -14,000 C. -16,000 D. -18,000
How much heat energy (in megajoules) is needed to convert 7 kilograms of ice at –9°C to water at 0°C?A. 2.48 MJ B. 2.13 MJ C. 3.26 MJ D. 3.09 MJ
Is potential difference is same in parallel series

Which astronomer spent 20 years plotting the positions of the planets

Answers

Answer

Tycho Brahe

Explanation

Tycho Brahe who was born on 1546. He was an astronomer.Tycho Brahe spent 20 years in plotting the positions of the planets and he was among those astronomers who helped in giving the  heliocentric model of the universe..
That was Tycho Brahe, and I thought it was actually more years than that.

The mass of a stroller and the child it carries is 23.7 kg. A man pushes the stroller with a force of 142 N at an angle of 38.0° to the vertical. The stroller experiences a friction force of 24.0 N due to the brake accidentally being on. What is the stroller's acceleration forward?A. 5.99 m/s2
B. 3.90 m/s2
C. 2.68 m/s2
D. 4.98 m/s2

Answers

the horizontal resultant force applied is 142*Cos(38) which is 135.62N

24N of opposing force
therefore the total force acting on the stroller is 135.62-24=111.62N

applying the formula f=ma
where f is force
m= mass
a= acceleration
plugging the values we get the stroller's acceleration forward as 3.90 m/s^2

A skier pushes her ski poles against the ground. She begins to move across the snow. Earth does not seem to move. Identify the action and reac-tion forces in this example, and explain why the skier moves but Earth does not seem to.

Answers

Answer:

The earth has a larger mass and therefore more inertia.

Explanation:

What is the product of an object's mass and velocity?

Answers


That product is the object's momentum. 
It has a direction ... the same direction as the velocity.

What does the doppler effect tell astronomers about the universe

Answers

The doppler effect has red and blue shifts. A red shift means something is moving farther away, and a blue shift means it is moving closer. The universe has a red shift, and since a red shift means that it is moving farther away, this tells astronomers that the universe is still expanding.

1. Read each description below. Choose the force diagram (free-body diagram) that best represents the description. The forces are acting on the object in red type. You may neglect the effects of air resistance. A. Mindy's Christmas tree ornament hangs motionless on a tree.
B. Corey's Christmas tree ornament is falling to the floor.
C. A ball thrown by Ginger is moving upward through the air.
D. A ball dropped by Melissa is falling downward toward the floor.
E. Matt's book is motionless on a table.
F. A ball that was thrown upward by Yvonne is at the top of its path.

For each statement, please choose a diagram representing the force on the object. (Diagrams are in the attachment)

Answers

A. Mindy's Christmas tree ornament hangs motionless on a tree. --- Diagram C
B. Corey's Christmas tree ornament is falling to the floor. --- Diagram A
C. A ball thrown by Ginger is moving upward through the air. --- Diagram B
D. A ball dropped by Melissa is falling downward toward the floor. --- Diagram A
E. Matt's book is motionless on a table. --- Diagram C
F. A ball that was thrown upward by Yvonne is at the top of its path --- Diagram A.

Final answer:

Free-body diagrams are tools to visualize external forces on an object, drawn as a point. Each scenario given (hanging ornament, falling ornament, moving and dropped balls, book on a table, and ball at top of its path) will have a unique diagram with forces like gravity, tension, and normal force labeled as vectors, and x/y components shown if necessary.

Explanation:

In physics, a free-body diagram is a graphical representation used to visualize the forces acting on an object. To correctly create a free-body diagram, follow these steps:

  • Draw the object as a point, especially when considering it as a particle.
  • Label all the external forces acting on the object with vector arrows.
  • Resolve each force into its x and y components if necessary for analysis.
  • Create separate diagrams for each object if multiple objects are involved.

Each scenario provided in the question will have a different free-body diagram:

  1. Mindy's Christmas tree ornament: It's stationary, with two forces in balance: gravitational force (weight) pulling down and the tension in the string pulling up.
  2. Corey's Christmas tree ornament: Only one force, gravitational force, is acting on it as it falls.
  3. Ginger's ball moving upward: Two forces here - gravitational force pulling down and the initial upward force while it moves up.
  4. Melissa's dropped ball: Similar to B, only gravitational force acts on it.
  5. Matt's book on a table: Gravitational force pulls it down while the normal force from the table supports it from below.
  6. Yvonne's ball at the top of its path: Though motionless at this instant, the only force acting on it is gravity.

Note, while drawing a free-body diagram, do not include net forces or internal forces.
Other Questions
12. Which of the following can be calculated if the length of the effort arm and the length of the resistance arm are given? (Points : 3)the mechanical advantage of a lever can be calculated.the mechanical advantage of a wheel and axle can be calculated.the mechanical advantage of a pulley can be calculated.the mechanical advantage of a wedge can be calculated.
Find the perimeter of the rectangle if each block represents one foot(show your calculation)
How does a parachute change the terminal velocity of a skydiver?A. It will increase her terminal velocity.B. It will decrease her terminal velocity.C. It will reduce her terminal velocity to zero.D. It will change the direction of her terminal velocity.
The nucleus of some isotopes will spontaneously undergo nuclear decay. These isotopes are said to be radioactive. what causes the nucleus of an isotope to be radioactive? Question 17 options: A. the net charge of the atom B. the attraction of protons to electrons C. an unstable ratio of protons and neutrons exposure to toxic chemicals D. too many electrons in its orbitals