In this example we will use pendulum motion to actually measure the acceleration of gravity on a different planet. An astronaut on the surface of Mars measures the frequency of oscillation of a simple pendulum consisting of a ball on the end of a string. He finds that the pendulum oscillates with a period of 1.5 s. But the acceleration due to gravity on Mars is less than that on earth, gMars=0.38gearth. Later, during a journey to another planet, the astronaut finds that his simple pendulum oscillates with a period of 0.92 s. What planet is he now on?SOLUTIONSET UP Each planet has a different value of the gravitational acceleration g near its surface. The astronaut can measure g at his location, and from this he can determine what planet he's on. First we use the information about Mars to find the length L of the string that the astronaut is swinging. Then we use that length to find the acceleration due to gravity on the unknown planet.
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Answer:
Explanation:
Let length of the pendulum be l . The expression for time period of pendulum is as follows
T = 2π
For Mars planet ,
1.5 =
For other planet
.92 =
Squiring and dividing the two equations
The second planet appears to be earth.
Related Questions
The Lamborghini Huracan has an initial acceleration of 0.80g. Its mass, with a driver, is 1510 kg. If an 80 kg passenger rode along, what would the car's acceleration be?
The 9-inch-long elephant nose fish in the Congo River generates a weak electric field around its body using an organ in its tail. When small prey, or even potential mates, swim within a few feet of the fish, they perturb the electric field. The change in the field is picked up by electric sensor cells in the skin of the elephant nose. These remarkable fish can detect changes in the electric field as small as 3.00 μN/C. How much charge, modeled as a point charge, in the fish would be needed to produce such a change in the electric field at a distance of 63.5 cm ?
Each plate of a parallel‑plate capacitor is a square of side 0.0479 m, and the plates are separated by 0.479 × 10 − 3 m. The capacitor is charged and stores 8.11 × 10 − 9 J of energy. Find the electric field strength E inside the capacitor.
A 600W toaster, 1200W iron and a 100W bulb are all connected to household 120V circuit. a) find the current drawn by each applianceb) the resistance of the heating element in the ironc) the total cost of running all of the appliances non-stop for 5 days if the electricity rate is $0.1 per KW-Hr.
Answers
Answer:
45 W/m^2
Explanation:
Intensity of light, Io = 90 W/m^2
According to the law of Malus
The average value of Cos^θ is half
So, I = Io/2
I = 90 /2
I = 45 W/m^2
Final answer:
Unpolarized light, when passed through a polarizer, reduces its intensity by half. So, the intensity if the light that emerges from a vertical filter will be 45 W/m².
Explanation:
Given that the incident intensity of the unpolarized light is 90 W/m², when passed through a vertically oriented optical filter, the emerging light will be polarized and will have its intensity halved as it's the property of a polarizing filter to decrease the intensity of unpolarized light by a factor of 2. The formula used in this process is I = Io cos² θ. In the case of unpolarized light passing through a single polarizer, θ is 0. So, the formula simplifies to I = Io/2.
Therefore, the intensity of the light that emerges from the vertically oriented optical filter is: I = 90 W/m² / 2 = 45 W/m².
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Answers
If it ever does move, then the work he does is
(1300) x (the distance the block moves, in meters) .
The unit is 'joules.
Answers
"The equation can be used to calculate the power absorbed by any surface" statement concerning the Stefan-Boltzmann equation is correct.
Answer: Option A
Explanation:
According to Stefan Boltzmann equation, the power radiated by black body radiation source is directly proportionate to the fourth power of temperature of the source. So the radiation transferred is absorbed by another surface and that absorbed power will also be equal to the fourth power of the temperature. So the equation describes the relation of net radiation loss with the change in temperature from hotter temperature to cooler temperature surface.
So this law is application for calculating power absorbed by any surface.
Answers
Answer:
31.29 m/sec
Explanation:
We have given density of substance
We have convert this into
We know that 1 lb = 0.4535 kg. so 0.14 lb = 0.14×0.4535 = 0.06349 kg
We know that 1 kg = 1000 g ( 1000 gram )
So 0.06349 kg = 63.49 gram
And we know that 1 gram = 1000 milligram
So 63.49 gram
We know that
So
So =\frac{63.49\times 10^3}{0.2249\times 10^{-5}}=276.74\times 10^8lb/m^3[/tex]
In second part we have to convert 70 mi/hr to m/sec
We know that 1 mi = 1609.34 meter
So 70 mi = 70×1609.34 = 112653.8 meter
1 hour = 3600 sec
So 70 mi/hr
Answers
Answer:
Yes.
Explanation:
This is because "negative velocity" just means it is in the negative in relation to the point of 0. Negative velocity doesn't equal a decrease in velocity. For example lets say you were parked next to a cone (this cone represents zero) if you accelerate forwards then that would be positive acceleration. If you were to accelerate backwards, this would be in the negative direction, aka negative velocity.
SUMMARY:
A negative velocity means that the object which has the negative velocity is moving in the opposite direction of an object moving at a positive velocity. This is a question of frame of reference. The possibility for the velocity is what makes it different to the speed. Speed is only positive.
Final answer:
In physics, a negative velocity can be faster than a positive one when considering speed alone, but not when considering motion direction. For instance, if a car is moving faster but in an opposite direction, it will have a higher speed but a negative velocity.
Explanation:
In physics, the term velocity represents both the speed of an object and its direction of motion. A negative velocity simply means that the object is moving in the opposite direction of the reference point. So, a car moving with a negative velocity can 'move faster' than a car moving with positive velocity if you're considering its speed alone.
Let's assume you have Car A moving at a speed of 40 km/hr in the eastern direction (positive velocity) and Car B moving at a speed of 60 km/hr in the western direction (negative velocity). Even though Car B is described as having a negative velocity, it is moving faster than Car A in terms of speed.
However, remember that in physics, direction matters when considering velocity. So, if you compare their velocities without ignoring the direction, Car A is moving faster to the east than Car B is to the west, even if Car B has higher speed.
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the right, and the initial velocity of the ball B is 6 meters per second to the left. The
final velocity of ball A is 9 meters per second to the left, while the final velocity of
ball B is 6 meters per second to the right.
1. Explain what happens to each ball after the collision. Why do you think this
occurs? Which of Newton’s laws does this represent?
Answers
Answer:
Yes, the law of conservation of momentum is satisfied. The total momentum before the collision is 1.5 kg • m/s and the total momentum after the collision is 1.5 kg • m/s. The momentum before and after the collision is the same.
Explanation: