PHYSICS HIGH SCHOOL

If X = 5 and Y = 3, what does Z equal?
2X + 2Z = 10Y

Answers

Answer 1

Answer:

Z equals 10, when substitute X = 5 and Y = 3 in 2X + 2Z = 10Y.

What are Arithmetic operations?

Arithmetic operations can also be specified by the subtract, divide, and multiply built-in functions.

* Multiplication operation: Multiplies values on either side of the operator

For example 4*2 = 8

/ Division operation: Divides left-hand operand by right-hand operand

For example 4/2 = 2

Given that equation as:

⇒ 2X + 2Z = 10Y

If X = 5 and Y = 3,

Substitute the values of X = 5 and Y = 3,

⇒ 2(5) + 2 (Z) = 10(3)

Apply the multiplication operation

⇒ 10 + 2Z= 30

⇒ 2Z = 20

⇒ Z = 20/2

Apply the division operation

⇒ Z = 10

Hence, Z equals 10, when Substitute X = 5 and Y = 3 in 2X + 2Z = 10Y

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Answer 2

Answer: 2(5) + 2 (z) = 10{3}
10 + 2z= 30
2z=20
z=10

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Two dogs pull on a toy. One pulls with a force of 10N, the other with a force of 15N. In what relative directions can the dogs act to give the toy the smallest acceleration?

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Answers

I believe the answer is false

The answer is false.

You take a trip to a star located 1,000 light-years away and return. you travel at an average speed of 0.99c. hint: the time dilation formula is: t′=t1−(vc)2−−−−−−−−√. about how many years will pass on earth while you are gone?

Answers

Answer: 70712.44 ly

Using the following time dilation formula:

$t = \frac {t_o} {\sqrt{1- \frac {v^2}{c^2}}}$

where $t_o$ is the time measured in the moving frame, $v$ is the speed of the moving frame, $c$ is the speed of light and $t$ is time measured in other frame.

Inserting the values:

$t = \frac {1000 ly} {\sqrt{1- \frac {(0.99c)^2}{c^2}}}\n \Rightarrow t=\frac {1000 ly} {√(1-(0.99)^2)} \n \Rightarrow t=(1000ly)/(0.0141)=70712.44 ly$

Therefore, when a trip to a star 1000 ly years away is made with speed 0.99 c, 70712.44 ly would have passed on Earth.

Final answer:

Approximately 999 years will pass on Earth while you are gone.

Explanation:

The formula for time dilation is t′ = t1 - (vc)2 / c.
To calculate how many years will pass on Earth while you are on this trip, we need to determine the time experienced by the astronaut and then use the time dilation formula.
According to the information provided, the astronaut travels at an average speed of 0.99c, so v = 0.99c. The star is located 1,000 light-years away, so t1 = 1,000 years.
Plugging these values into the time dilation formula, we get:

t′ = 1,000 years - (0.99c)2 / c = 1,000 years - 0.9801 years = 999.0199 years.

Therefore, approximately 999 years will pass on Earth while you are gone.

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Sehidy the given figure and calculate the load distance. Given: 325 N, 40 cm Unknown: 650 N, ?

Answers

the load distance is approximately 0.2 meters or 20 cm. To calculate the load distance in this scenario, we can use the principle of moments, which states that the sum of clockwise moments about a point is equal to the sum of counterclockwise moments about the same point when an object is in equilibrium.

In this case, we have two forces:

1. A known force of 325 N applied at a distance of 40 cm (0.4 meters) from the point of interest.

2. An unknown force of 650 N applied at an unknown distance, which we need to find.

Let's assume the unknown distance is "d" meters.

Using the principle of moments:

Clockwise Moment = Counterclockwise Moment

(325 N) * (0.4 m) = (650 N) * (d m)

Solving for "d":

d = (325 N * 0.4 m) / 650 N

d ≈ 0.2 meters

So, the load distance is approximately 0.2 meters or 20 cm.

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The motion of a car on a position-time graph is represented with a horizontal line. What does this indicate about the car’s motion? A. It’s not moving. B. It’s moving at a constant speed. C. It’s moving at a constant velocity. D. It’s speeding up. i dont know if ive asked this before if i have sorry

Answers

answer i think its d because the car is gradually going up

Final answer:

A horizontal line on a position-time graph represents a stationary object or, in this case, a parked car. The car is not moving since there's no change in position over time. Speed or velocity would be depicted by the slope of the line on the position-time graph.

Explanation:

Your question pertains to understanding what a horizontal line on a position-time graph indicates about a car's motion. In the context of a position-time graph, a horizontal line suggests that the position of the car is not changing with respect to time, indicating option A: The car is not moving. The car being stationary means there is no change in position over time, hence the horizontal line on the graph.

Options B, C, and D suggest a change in position over time, which would be represented by a slanted line, not a horizontal one. Option B: 'moving at a constant speed' and Option C: 'moving at a constant velocity' would both produce a straight line with a slope, not a horizontal line. Option D: 'speeding up' would be represented by a curved line, showing acceleration.

In contrast, a stationary object or a car at rest is represented by a horizontal line on a position-time graph. Velocity or speed, on the other hand, is determined by the slope of the line on a position-time graph. Hence, a horizontal line, having no slope, signifies zero speed or velocity, indicating that the car is not moving.

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Surface winds on Earth are primarily caused by differences inA) Air density due to unequal heating of Earth's surface.
B) Distances from the Sun during the year.
C) Rotational speeds of Earth's surface at various latitudes.
D) Ocean wave heights during the tidal cycle.
Explain pls

Answers

Surface winds on Earth are primarily caused by differences in Air density due to unequal heating of Earth's surface. The answer is letter A. Surface currents are driven by winds that blow in certain patterns. They are caused by the Earth’s spin and the Coriolis effect. Evaporation adds water to the atmosphere. It is the change from liquid to gas wherein liquid molecules tends to go the gas phase and increases the number of molecules.

Explanation:

Causes of Different Pressure on the Earth's Exterior. Differences in pressures across the cover of the Earth are fundamentally produced by irregular heating of the surface by the Sun.

Final answer:

Surface winds on Earth are primarily caused by differences in air density due to unequal heating of Earth's surface. The Hadley circulation and the Coriolis effect influence the direction and patterns of these winds.

Explanation:

Surface winds on Earth are primarily caused by differences in air density due to unequal heating of Earth's surface. When the sun's rays hit the equator, the air at this latitude becomes heated and rises, creating an area of low pressure. This causes air from cooler, higher pressure areas to flow towards the equator, resulting in surface winds.

This circulation pattern is known as the Hadley circulation and is responsible for the trade winds, which blow from east to west near the equator. Similarly, the temperature differences between the poles and the equator create the polar easterlies and the prevailing westerlies.

As the Earth rotates on its axis, the Coriolis effect comes into play, causing the wind to be deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. This is why trade winds blow from east to west and prevailing westerlies blow from west to east.

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On a highway, a car is driven 80. kilometersduring the first 1.00 hour of travel,
50. kilometers during the next 0.50 hour, and
40. kilometers in the final 0.50 hour. What is the
car’s average speed for the entire trip?
(1) 45 km/h (3) 85 km/h
(2) 60. km/h (4) 170 km/h

Answers

The average speed of the car for the entire trip can be calculate by using:

$v=(S)/(t)$

where S is the total distance covered by the car, and t is the total time taken.

The total distance travelled by the car is:

$S=80 km+50 km+40 km=170 km$

while the total time taken is:

$t=1.00 h+0.50 h+0.50 h=2.00 h$

so, the average speed of the car is:

$v=(S)/(t)=(170 km)/(2.00 h)=85 km/h$

so, the correct answer is (3) 85 km/h.

The average speed of the car for entire trip is $\boxed{85\text{ km/h}}$ .

Further Explanation:

Speed is the measure of a quantity of an object the tells how fast the object is moving in the other words we can define the speed that it is the distance covered by an body divided by the time taken to cover that distance. It is a quantity with only magnitude so it is a scalar quantity.

The average speed is defined as the sum of all the distance traveled by the body divided by the sum of time taken to travel that distance.

Given:

The distance travel by the car is $80\text{ km}$ for $1.00\text{ hours}$ .

The distance travel by the car is $50\text{ km}$ for $0.50\text{ hours}$ .

The distance travel by the car is $40\text{ km}$ for .

$0.50\text{ hours}$ .

Concept:

The expression for the average can be written as:

S = $\frac{{{\text{sum of distances }}}}{{{\text{sum of time}}}}$ …… (1)

The distance travel by the car is $80\text{ km}$ for $1.00\text{ hours}$ , distance travel by the car is $50\text{ km}$ for $0.50\text{ hours}$ and distance travel by the car is $40\text{ km}$ for $0.50\text{ hours}$ .

The sum of the distance is:

$\begin{aligned}D&=80{\text{ km}}+{\text{50 km}}+40{\text{ km}}\n&=170{\text{ km}}\end{aligned}$