A block of mass 5 kg is sitting on a
frictionless surface. The block initially has a velocity of
3 m/s. A force of 9 N is applied
for 2 s.
What is the Initial momentum of the block?
kg m/s
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What is the Initial Kinetic Energy of the
block?
J
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What is the change in momentum of the block?
Kg m/s
| Tries 0/2 |
What is the final momentum of the block?
kg m/s
| Tries 0/2 |
What is the final velocity of the block?
m/s
| Tries 0/2 |
What is the final Kinetic Energy of the block?
J
In: Physics
Your grandfather clock’s pendulum has a length of 0.9930 m. if the clock runs slow and loses 21 s per day, how should you adjust the length of the pendulum?
In: Physics
Pool players often pride themselves on their ability to impart a large speed to a pool ball. In the sport of billiards, event organizers often remove one of the rails on a pool table to allow players to measure the speed of their break shots (the opening shot of a game in which the player strikes a ball with his pool cue). With the rail removed, a ball can fly off the table. As the only participant with a physics background, they have placed you in charge of determining the speed of the players\' break shots.
The top of the pool table is 0.730 m from the floor. The placement of the tape is such that 0 m is aligned with the edge of the table (as shown). The winner of the competition wants to know if he has broken the world record for the break shot of 32 mph (about 14.3 m/s). If the winner\'s ball landed a distance 4.25 m from the table edge, calculate his break shot speed.
At what speed did his pool ball hit the ground?
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Two loudspeakers emit sound waves along the x-axis. A listener in front of both speakers hears a maximum sound intensity when speaker 2 is at the origin and speaker 1 is at x = 0.500m . If speaker 1 is slowly moved forward, the sound intensity decreases and then increases, reaching another maximum when speaker 1 is at x =0.850m .
A)What is the frequency of the sound? Assume vsound =340m/s.
B)What is the phase difference between the speakers?
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A wire made from tungsten is 4.5 m long and 0.45 mm in diameter. What is its resistance at 1500°C?
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Which variables are in Coulomb’s law?
Which constants are in Coulomb’s Law?
What does it mean that a quantity is a
variable?
What does it mean that a quantity is a constant and
how is a constant different from a variable?
What does Coulomb’s law say about the force between
two charged particles? In terms of distance between particles?I n
terms of the charges?
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Chlorine is an unusual element in that it has two abundant stable isotopes, Cl-35 and Cl-37, constituting, respectively, about 76% and 24% of natural chlorine. The masses of these isotopes in unified atomic mass units, are, to three significant figures, equal to their mass numbers of 35 and 37. A mass spectrometer is used with singly ionized chlorine atoms. The spectrometer has a 3.5-kV accelerating potential and a 163-mT magnetic field. How far apart will Cl-35 and Cl-37 ions be when they reach the detector
?
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A certain crystal is cut so that the rows of atoms on its surface are separated by a distance of 0.352 nm. A beam of electrons is accelerated through a potential difference of 175 V and is incident normally on the surface. If all possible diffraction orders could be observed, at what angles (relative to the incident beam) would the diffracted beams be found? (The surface acts as a diffraction grating where maxima occur when d sin? = n?, n = 1,2,3...)
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A blacksmith heats a 1.4 kg iron horseshoe to 500?C , then plunges it into a bucket containing 20 kg of water at 15?C
What is the equilibrium temperature?
Express your answer using two significant figures.
.
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As per in the title. If it turns out that neutrinos do travel faster than the speed of light, how will the success of special relativity be explained? My apologies if this has been asked before; I've just browsed through few questions, and I couldn't find one that matches (although it was slightly touched on in one answer). Thanks.
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hey i need perfect answer to following query. Needs 200 words for complete query. i need typed solution . Don't post any pic in solution.
Describe some important changes you would suggest to a “trebuchet” manufacturer. Explain your improvement in terms of motion in two dimensions.
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Using the following equation: x = (8P/9M)^1/2 * t^3/2, Draw a graph of position vs time, when P=800W, P= 400W and P = 200W and M = 1632.6kg. Also draw a graph of velocity vs time. Is this a problem constant acceleration?
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Two lenses are separated by L = 50.0 cm. The first lens (light coming from the left.) has a focal length f1 = 24.0 cm and the second lens has a focal length f2 = 18.0 cm. An object is located 40.0 cm (s1) to the left of the first lens. Calculate the position of the two images formed by the lens system. State whether each image is real or virtual. Repeat this problem with L = 10.0 cm.
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Four identical point charges of magnitude q = 3.2 nC are placed at the corners of a rhombus of edge length l = 22 cm and obtuse angle θ. We intentionally leave θ undefined. Find the net electric force on each of the four charges. Your answer will depend on the angleθ. For convenience, orient your rhombus so that the charges are placed at (±x, 0) and (0, ±y).
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