Resolve the following two forces into horizontal and vertical components.

Answers

Answer 1

Answer:
All components of both forces have zero magnitudes.

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One cubic foot (1 ft3 ) of seawater weighs about 64 pounds. Suppose you pour one cubic foot of seawater into a light plastic bag, tie the bag closed with no air bubbles inside, and lower it into the ocean via a light attached string. When the bag of seawater is completely submerged, how much force do you have to exert on the sting to hold it up: a. 0 lbs b. 32 lbs c. 64 lbs d. 128 lbs e. You have to push it down because it tends to come up. Please circle your answer and explain your reasoning.

DEFINE UNIFORM AND NON UNIFORM VELOCITY

Answers

Explanation:

Uniform velocity is when an object goes an equal amount of space in an equal amount of time whereas non uniform velocity is when the object covers an unequal amount of distance in an equal amount of time.

How many neutrons does element X have if its atomic number is 38 and its mass number is 71?

Answers

Answer:

The element has 33 neutrons

Explanation:

1. Find the mass number:

Mass number = number of protons + number of neutrons

Mass number = 71

2. Find the atomic number:

Atomic number = number of protons

Atomic number = 38

3. Find the number of neutrons:

Number of neutrons = Mass number - Atomic number

Number of neutrons = 71 - 38

Number of neutrons = 33

The nucleus of an atom has some protons and some neutrons in it.
The "mass number" is the total number of all particles in the nucleus.
The "atomic number" is the number of protons in the nucleus.

Element X has 71 particles in the nucleus, and 38 of them are protons.
So (71-38) = 33 of them are neutrons.

Which is an example of velocity?A. A pickup driving 30 km in 20 minutes
B. A car slowing down on a sharp curve
C. An airplane traveling 450 km/h
D. An 18 wheeler driving west at 50 km/h
PLZ help

Answers

D because it includes both acceleration and direction.

A
Velocity is the rate of motion, speed or action

Draw a diagram to show how two resistors R1 and R2 are connected in parallel.

Answers

See attached
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What acceleration would engineers at Boeing calculate for the 737-900 during a typical take-off, given the plane's 78,200-kg mass and its maximum engine force of 121,000 N? A) 1.55 m/s² B) 0.98 m/s² C) 2.45 m/s² D) 0.62 m/s²

Answers

Answer:

Approximately $1.55\; {\rm m\cdot s^(-2)}$ , assuming that the runway is level, and that air resistance is negligible at the start of take-off.

Explanation:

The acceleration of this aircraft can be found in the following steps:

Find the net force on this aircraft.
Divide net force by mass to find acceleration.

Assume that when the plane just started the take-off, the air resistance (drag) on this aircraft is negligible. Forces on this aircraft during takeoff would include:

Weight of the aircraft (downward),
Normal force from the ground (upward), and
Thrust (forward.)

Under the assumption that the plane is on a level runway, forces in the vertical direction would be balanced. The only unbalanced force would be thrust, which is in the horizontal direction. Hence, the net force on this aircraft would be equal to thrust.

If the engine force is at the maximum value, the thrust and the net force on the aircraft would be $121,\!000\; {\rm N}$ . Divide the net force on this aircraft by mass to find acceleration:

$\begin{aligned} a &= \frac{F_{\text{net}}}{m} \n &= \frac{121000\; {\rm N}}{78200\; {\rm kg}} \n &\approx 1.55\; {\rm m\cdot s^(-2)}\end{aligned}$ .

In other words, the acceleration of this aircraft would be no greater than approximately $1.55\; {\rm m\cdot s^(-2)}$ under the assumptions.

Final answer:

The acceleration of the Boeing 737-900 during take-off, calculated using Newton's second law of motion (Force = Mass x Acceleration), is approximately 1.55 m/s².

Explanation:

The acceleration of the Boeing 737-900 during take-off can be calculated using Newton's second law of motion, which states that Acceleration = Force/Mass. In this case, the force is the maximum engine force, and the mass is the mass of the airplane. So, acceleration (a) = Force (F) / Mass (m) = 121,000 N / 78,200 kg = 1.548 m/s². Therefore, the closest answer to this calculation would be A) 1.55 m/s².

Learn more about Acceleration here:

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Which of the following is not a reason fluorescent lamps are advantageous over incandescent lamps? A. Fluorescent lamps are more efficient than incandescent lamps.
B. Fluorescent lamps operate at a higher temperature than incandescent lamps.
C. Fluorescent lamps dissipate more energy as light instead of heat than incandescent lamps.
D. Fluorescent lamps produce light with less glare than incandescent lamps.

Answers

Answer;

B. Fluorescent lamps operate at a higher temperature than incandescent lamps.

Explanation;

-A fluorescent lamp, is a type of electric light (lamp) that uses ultraviolet emitted by mercury vapor to excite a phosphor, which emits visible light.

-A fluorescent lamp produces less heat, thus, it is much more efficient. A fluorescent bulb can produce between 50 and 100 lumens per watt. This makes fluorescent bulbs four to six times more efficient than incandescent bulbs.

-Fluorescent lamps operate best around room temperature. At much lower or higher temperatures, efficacy decreases.

The right answer for the question that is being asked and shown above is that: "C. Fluorescent lamps dissipate more energy as light instead of heat than incandescent lamps." This is not a reason fluorescent lamps are advantageous over incandescent lamps.

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