PHYSICS HIGH SCHOOL

Which of the following is not a type of pulley systemA fixed
B movable
C combination
D advantageous

Answers

Answer 1
Answer: D advantageousA pulley is a wheel on an axle or shaft that is designed to support movement and change of ... The drive element of a pulley system can be a rope, cable, belt, or chain that runs over the pulley.

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When a wire is made smaller, the resistance increases. Which happens to the electric current?

Answers

Any time the resistance in a circuit increases, for any reason, the
current in the circuit decreases, unless the voltage is increased
to compensate for the greater resistance.

Which of the following is a result of reduced levels of red blood cells and elevated levels of white blood cells in the body?

Answers

There are no following but less red blood cells would make you tired because you can carry as much oxygen and more white blood cells could cause infection if the start attacking you. It could also give you bone marrow cancer if there are too many white blood cells.

Can a vector be shorter than one of its components

Answers

It can never be shorter than a component - magnitude of avector is the square root of the sum of the components squared, and a square function never produces a negative number. However, it can be the same size as its component, if that component is the only one

2 QUESTIONS HELP PLZ...:/Which of the following is not part of the structure of a comet?

A. Coma
B. Head
C. Dust tail
D. Nucleus

How far can light travel in one year?

A. 300,000 km
B. 30 million km
C. 10 trillion km
D. 100 billion km

THANKS IF ANYONE CAN HELP =)

Answers

The first one is: head
Second one is: 10 trillion km

Which of the following terms describes the motion of particles during the transmission of wave energy?

Answers

The motion of particles during the transmission of wave energy is periodic. A periodic wave is a continuous oscillating motion that connects with simple harmonic motion. It is usual that periodic wave particles also experiences simple harmonic motion. Additionally, the particles on the surface of the water travel in circular motions forming a wave across the surface.

Which statement BEST describes why warm ocean currents are usually surface currents? A) Warm water is less dense than cold water.
B) Ocean tides bring warm water to the surface.
C) Warm water contains more salt than cold water.
D) Ocean water loses heat to the air at the surface.

Answers

I think it is B because it seems like the most valid choice.

Answer:

The answer is A because the less dense the water is the more closer to the surface it will be and when heated by the sun, it increases the temperature of surface currents.

Explanation:

I took the test, hope this helped!
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A 25-gram paper cup falls from rest off the edgeof a tabletop 0.90 meter above the floor. If thecup has 0.20 joule of kinetic energy when it hitsthe floor, what is the total amount of energyconverted into internal (thermal) energy duringthe cup’s fall?(1) 0.02 J (3) 2.2 J(2) 0.22 J (4) 220 J
PLEASE HELP ME What does a moving charge experience when it is near a magnetic field? static friction gravity a stationary charge a force
Examine the false statement. Scientists can directly observe the half-life of all radioactive elements. What option rewords the statement so that it is true? Select all that apply. Scientists can calculate the rate of nuclear decay for all radioactive elements using half-life. Scientists can calculate the half-life of all radioactive elements using the rate of nuclear decay. Scientists cannot directly observe or calculate the rate of nuclear decay for all radioactive elements. Scientists can directly observe the rate of nuclear decay for all radioactive elements.