PHYSICS HIGH SCHOOL

17. Alyssa just bought a new set of string lights for her bedroom. She decided to use the lights to outline her mirror. The lights are on a series circuit. If Alyssa were to buy more lights so that they can go all around her bedroom, what will happen to following quantities?:a. The resistance of the entire circuit will (increase/decrease).
b. The current through each bulb will (increase/decrease).
c. The voltage available to each bulb will (increase/decrease).

Answers

Answer 1

Answer:

a. The resistance will increase

b. The current will decrease

c. The voltage through each bulb will

Explanation:

a. For a series of resistors, the equivalent resistance is given by

$R=R_1+R_2+...+R_n$

so, we see that adding more resistors in series, will increase the total resistance.

b. In a series circuit, the current through each bulb is the same for each bulb, and it is equal to the current flowing in the circuit, which is given by Ohm's law

$I=(V)/(R)$

where V is the voltage supplied by the battery and R the total resistance of the circuit. Since the voltage provided by the battery, V, does not change, while the total resistance R increases, the current I will increase.

c. The voltage through each bulb is given by

$V=R_i I$

where R_i is the resistance of the individual resistor and I is the current. Since the value of R_i does not change, while I (the current) has decreased, the voltage available to each bulb, V, will decrease.

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If Sarah melts 10g of tin. What mass of melted tin would she have at the end of the experiment?
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A bowling ball with a mass of 4.5 kg travels at a velocity of 37 m/s for 2.5 s until it stopped at the end of the lane by the ball return. What additional info is required to determine the weight of the bowling ball?

Answers

None. We already have more than we need ... provided only that the lane is on Earth.

Weight = (mass) (gravity).

On Earth, 'gravity' = 9.8 m/s^2.

Weight of the ball =

(4.5 kg) (9.8 m/s^2).= 44.1 newtons.

(roughly 9.9 pounds)

Question 1.1. Using correct biomechanics helps maximize sport performance. True
False

Question 2.2. The "Fosbury Flop" is named because his idea didn't work.
True
False

Question 3.3. Using correct biomechanics will actually decrease your chances of injury.
True
False

Answers

Question 1.1.True Question 2.2.False
Question 3.3.True
Hope this helps you!!! =')

How many times more intense is an earthquake that measures 7.5 on the Richter scale than one that measures 6.7? (Recall that the Richter scale defines magnitude of an earthquake with the equation M=log i/s , where i is the intensity of the earthquake being measured, and S is the intensity of a standard earthquake

Answers

.5 - 6.7 = 0.8
10^0.8 ≅ 6.309573445
The 7.5 earthquake is approximately 6.3 times as intense as the 6.7 earthquake

How to figure it using your equation:
M = log(i/s)
10^M = i/s
i = s·10^M
ratio of the intensities of the two earthquakes = (s·10^7.5)/(s·10^6.7)
= 10^(7.5-6.7)
= 10^0.8
≅ 6.3:1

Answer:

6.31 times ( approx )

Explanation:

Given formula to find the magnitude of an earthquake is,

$M=log((I)/(S))$

Where,

I = intensity of the earthquakebeing measured,

S = theintensity of a standard earthquake,

By the above formula,

$10^(M)=(I)/(S)$

$\implies I = S* 10^(M)$

Since, S is constant,

If M = 7.5,

Then intensity of the earthquake,

$I_1=S* 10^(7.5)$

If M = 6.7,

Then intensity of the earthquake,

$I_2=S* 10^(6.7)$

$(I_1)/(I_2)=(S* 10^(7.5))/(S* 10^(6.7))=10^(7.5-6.7)=10^(0.8)\approx 6.31$

$\implies I_1=6.31I_2$

Hence, the earthquake that measures 7.5 on the Richter scale is 6.3 times more intense than the earthquake that measures 6.7.

Hi.1. Define Position
2. Explain Distance
3. Differentiate between distance and position.

Note : All these questions are under Physics.

Answers

Answer:

1-Simple harmonic motion, in physics, repetitive movement back and forth through an equilibrium, or central, position, so that the maximum displacement on one side of this position is equal to the maximum displacement on the other side. The time interval of each complete vibration is the same

2-Distance is a numerical measurement of how far apart objects or points are. In physics or everyday usage, distance may refer to a physical length or an estimation based on other criteria (e.g. "two counties over"). The distance from a point A to a point B is sometimes denoted as

3-Position is the location of the object (whether it's a person, a ball, or a particle) at a given moment in time. Displacement is the difference in the object's position from one time to another. Distance is the total amount the object has traveled in a certain period of time.

Explanation:

hope it help

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:

brainly.com/question/2303856

#SPJ11

What is the main function of a telescope?It brings scientists closer to distant objects.

It magnifies light received from distant objects.

It measures the temperature of distant objects.

It measures the wavelengths of incoming light rays

Answers

Explanation :

Telescope is an instrument which is used to magnify distant objects bright, consistent and large.

The function of an ideal telescope must be :

Magnification
Resolution
Power of gathering of light

There are many types of Telescope like:

X ray telescope
Optical telescope
Ultraviolet telescope etc

Hence, the correct option is (b) " It magnifies light received from distant objects ".

It magnifies light received from distant objects.

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