PHYSICS HIGH SCHOOL

A circuit component with a high resistance will have a low electric current. a. True
b. False

Answers

Answer 1
Answer: You haven't said what 'high' resistance or 'low' current means, so there's way not enough info to nail the statement as true or false. The most precise answer is "certainly could be but not necessarily". Anyway, the current in the circuit depends on BOTH the resistance AND the voltage. So without knowing the voltage too, you can't say anything about the current.

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How is the horizontal component of velocity for a projectile affected by the vertical component?

Answers

It isn't. The horizontal and vertical velocities are separate. You separate that velocity into the horizontal component which is constant, disregarding air resistance, and vertical velocity which is changed by the acceleration due to gravity. Make calculations separately because they do not influence each other.

You're taking your first dive in ALVIN (Fig 10.13) to witness a hot spot on the ocean floor. As you descend and arrive on site, what are your first impressions?

Answers

Answer:

Explanation:

The experience is magnanimous and wonderful when witnessing the hotspot site. It was a great feeling! I could witness the red hot lava oozing out to the ocean floor from the subsurface like water from a hot-spring, and immediately, a cooling effect occurs. At that current time, the gas was coming up in the form of gas bubbles. I believed there was a mini-volcano located inside the ocean! The scene was fascinating, just like inserting a red-hot metallic-iron ball into the cool water, thereby creating a fizzing of gas and the ball's immediate cooling. It was a remarkable experience of witnessing an underwater volcano with the erupting lava and its immediate cooling to form a solid material.

Karen shouts across a canyon and hears an echo 7.5 s later. how wide is the canyon? the speed of sound is 343 m/s. answer in units of m.

Answers

After Karen shouts, the sound wave of her voice travels across the canyon, it hits the walls, and then it comes back to Karen in a total time of t=7.5 s. If we call L the distance between Karen and the other side of the canyon (so, L is the width of the canyon), it means that the sound wave covers a distance of S=2L in this time.
Since the wave moves by uniform motion, we can use the usual relationship between space, time and velocity:
v= (S)/(t)= (2L)/(t)
where v=343 m/s is the speed of sound. Using this number, we can find L from the previous equation:
L= (vt)/(2)= ((343 m/s)(7.5 s))/(2)=1286 m
So, the canyon is 1286 meters wide.

All of the following are long-term risks associated with exposure to secondhand smoke EXCEPT:a. increased risk of respiratory illness
b. increased risk of lung cancer
c. change in senses
d. increased risk of cardiovascular disease

In what year were cigarette packages made to include 6 warning labels that mentioned the surgeon general

Answers

All of the following are long-term risks associated with exposure to secondhand smoke EXCEPT:

A. increased risk of respiratory illness

B. increased risk of lung cancer

C. change in senses

D. increased risk of cardiovascular disease

This is the Correct Answer.
The answer is D.
Cardiovascular diseases are a result of a sedentary lifestyle and a poor diet. Secondhand smoke is not a risk factor for CV diseases. The other choice except letter D are long term risks associated with exposure to secondhand smoke. A person should stay away from people who are smokers so as not to obtain these possible complications within the body. Air filters in cigarettes are not present in the air which make chemical exposures at a higher level for people who are secondhand smokers compared to smokers themselves.

The image shows a ray diagram in a telescope. what lenses are used in the telescope

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Answer:

In a simple telescope two lenses are used, objective lens and eyepiece lens. A parallel beam of light is focused by the objective lens of a telescope and then light passes through an eyepiece forming a magnified image. Above diagram shows the ray diagram of an astronomical telescope.

Gravitational potential energy is a form of potential energyA.) caused by gravity alone.
B.) caused by gravity and that depends on an object's position and mass.
C.) caused by gravity and that depends on an object's mass, but not its position.
D.) caused by gravity and that depends on an object's position, but not its mass.

Answers

B. The mass and height dictates the force gravity will pull on it
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