• While placing a compact disc into a CD player, you notice a small chip on it\'s edge.?

While placing a compact disc into a CD player, you notice a small chip on it\'s edge. But you attempt to play the CD anyway by placing the CD into the player\'s deck with the chip at θ0 = 17.8° as measured from the x axis. The CD begins to rotate with angular acceleration α = 2.31 rad/s2. If the CD has been spinning for t = 3.51 s... show more
While placing a compact disc into a CD player, you notice a small chip on it\'s edge. But you attempt to play the CD anyway by placing the CD into the player\'s deck with the chip at θ0 = 17.8° as measured from the x axis. The CD begins to rotate with angular acceleration α = 2.31 rad/s2. If the CD has been spinning for t = 3.51 s and the disc has a radius of r = 6.00 cm, what are the x–y coordinates of the chip after this time, assuming the center of the disc is located at (0.00,0.00).
1 answer · Physics · 1 year ago
• A 0.185-kg particle undergoes simple harmonic motion along the horizontal x-axis between the points x1 = -0.261 m and x2 = 0.489 m.?

A 0.185-kg particle undergoes simple harmonic motion along the horizontal x-axis between the points x1 = -0.261 m and x2 = 0.489 m. The period of oscillation is 0.507 s. Find the frequency, f, the equilibrium position, xeq, the amplitude, A, the maximum speed, vmax, the maximum magnitude of acceleration, amax, the force constant, k, and the total... show more
A 0.185-kg particle undergoes simple harmonic motion along the horizontal x-axis between the points x1 = -0.261 m and x2 = 0.489 m. The period of oscillation is 0.507 s. Find the frequency, f, the equilibrium position, xeq, the amplitude, A, the maximum speed, vmax, the maximum magnitude of acceleration, amax, the force constant, k, and the total mechanical energy, Etot.
1 answer · Physics · 1 year ago
• Suppose that there are two very large reservoirs of water, one at a temperature of 89.0 °C, and one at a temperature of 21.0 °C.?

Suppose that there are two very large reservoirs of water, one at a temperature of 89.0 °C, and one at a temperature of 21.0 °C. These reservoirs are brought into thermal contact long enough for 45910 J of heat to flow from the hot water to the cold water. Assume that the reservoirs are large enough so that the temperatures do not change significantly.
Suppose that there are two very large reservoirs of water, one at a temperature of 89.0 °C, and one at a temperature of 21.0 °C. These reservoirs are brought into thermal contact long enough for 45910 J of heat to flow from the hot water to the cold water. Assume that the reservoirs are large enough so that the temperatures do not change significantly.
1 answer · Physics · 1 year ago
• A copper cube with a mass of 100 grams is heated in a boiling water bath to 100.0 Celsius.?

A copper cube with a mass of 100 grams is heated in a boiling water bath to 100.0 Celsius. The cube is removed from the bath and placed on a very large block of ice which is at a temperature of 0.00 Celsius. What is the maximum mass of ice that could conceivably be melted by the heat exchange, assuming all the thermal energy is used to melt the... show more
A copper cube with a mass of 100 grams is heated in a boiling water bath to 100.0 Celsius. The cube is removed from the bath and placed on a very large block of ice which is at a temperature of 0.00 Celsius. What is the maximum mass of ice that could conceivably be melted by the heat exchange, assuming all the thermal energy is used to melt the ice? The specific heat of copper is 0.39 J/g-C and the enthalpy of fusion for water is 334 J/g.
Chemistry · 1 year ago
• A ladder is leaning against a vertical wall, and both ends of the ladder are at the point of slipping.?

A ladder is leaning against a vertical wall, and both ends of the ladder are at the point of slipping. The coefficient of friction between the ladder and the horizontal surface is μ1 = 0.115 and the coefficient of friction between the ladder and the wall is μ2 = 0.103. Determine the maximum angle with the vertical the ladder can make without falling... show more
A ladder is leaning against a vertical wall, and both ends of the ladder are at the point of slipping. The coefficient of friction between the ladder and the horizontal surface is μ1 = 0.115 and the coefficient of friction between the ladder and the wall is μ2 = 0.103. Determine the maximum angle with the vertical the ladder can make without falling on the ground.
1 answer · Physics · 1 year ago
• What is the horizontal component of the minimum force P necessary to push the wheelbarrow over the step?

A person pushing a horizontal, uniformly-loaded 28.30 kg wheelbarrow is attempting to get it over a step of height 0.370R, where R is the wheel\'s radius. What is the horizontal component of the minimum force P necessary to push the wheelbarrow over the step?
A person pushing a horizontal, uniformly-loaded 28.30 kg wheelbarrow is attempting to get it over a step of height 0.370R, where R is the wheel\'s radius. What is the horizontal component of the minimum force P necessary to push the wheelbarrow over the step?
2 answers · Physics · 1 year ago
• A horizontal meter stick has a mass of 243 g. Three weights ride on the meter stick: 251 g at 46.1 cm, 193g at 81.1 cm, and 199 g at 93.7 cm?

A horizontal meter stick has a mass of 243 g. Three weights ride on the meter stick: 251 g at 46.1 cm, 193 g at 81.1 cm, and 199 g at 93.7 cm. At what location on the meter stick would the system be in balance if it were suspended there?
A horizontal meter stick has a mass of 243 g. Three weights ride on the meter stick: 251 g at 46.1 cm, 193 g at 81.1 cm, and 199 g at 93.7 cm. At what location on the meter stick would the system be in balance if it were suspended there?
2 answers · Physics · 1 year ago
• A merry-go-round has a mass of 450 kg and a diameter if 2.2 meters. Assume it behaves physically like a disk with uniform density.?

A merry-go-round has a mass of 450 kg and a diameter if 2.2 meters. Assume it behaves physically like a disk with uniform density. First, how much work is required to accelerate it from rest to a final rotational speed of one revolution every six seconds? Second, what average force applied tangentially to the rim of the merry-go-round would be... show more
A merry-go-round has a mass of 450 kg and a diameter if 2.2 meters. Assume it behaves physically like a disk with uniform density. First, how much work is required to accelerate it from rest to a final rotational speed of one revolution every six seconds? Second, what average force applied tangentially to the rim of the merry-go-round would be required to make that happen in 75 seconds?
2 answers · Physics · 1 year ago
• If momentum is always conserved, what happens to the momentum of a ball of clay when it falls through the air strikes the ground and stops?

If momentum is always conserved, what happens to the momentum of a ball of clay when it falls through the air, strikes the ground and comes to a dead stop? And where did the momentum come from while it was falling, since it wasn’t colliding with anything during the drop?
If momentum is always conserved, what happens to the momentum of a ball of clay when it falls through the air, strikes the ground and comes to a dead stop? And where did the momentum come from while it was falling, since it wasn’t colliding with anything during the drop?
1 answer · Physics · 1 year ago
• A 85 kg lineman tackles a 90 kg receiver. The receiver is running 5.8 m/s, and the lineman is moving 4.1 m/s, at a right angle.?

A 85 kg lineman tackles a 90 kg receiver. The receiver is running 5.8 m/s, and the lineman is moving 4.1 m/s, at a right angle to the direction of the receiver's motion. If the lineman holds on to the receiver while they fall, what is their velocity immediately after the tackle? Report both the magnitude and direction, letting 0 degrees be the... show more
A 85 kg lineman tackles a 90 kg receiver. The receiver is running 5.8 m/s, and the lineman is moving 4.1 m/s, at a right angle to the direction of the receiver's motion. If the lineman holds on to the receiver while they fall, what is their velocity immediately after the tackle? Report both the magnitude and direction, letting 0 degrees be the direction of the receiver before the tackle.
2 answers · Physics · 1 year ago
• Calculate the final velocity right after a 119-kg rugby player who is initially running at 7.95 m/s collides head-on with a padded goalpost.?

Calculate the final velocity right after a 119-kg rugby player who is initially running at 7.95 m/s collides head-on with a padded goalpost and experiences a backward force of 1.81 × 104 N for 5.50 × 10-2 s.
Calculate the final velocity right after a 119-kg rugby player who is initially running at 7.95 m/s collides head-on with a padded goalpost and experiences a backward force of 1.81 × 104 N for 5.50 × 10-2 s.
2 answers · Physics · 1 year ago
• How far up the ramp (in the direction along the ramp) does the block go before it comes to a stop?

A 7.25-kg block is sent up a ramp inclined at an angle θ = 33.5° from the horizontal. It is given an initial velocity v0 = 15.0 m/s up the ramp. Between the block and the ramp, the coefficient of kinetic friction is μk = 0.397 and the coefficient of static friction is μs = 0.712. How far up the ramp (in the direction along the ramp) does the block... show more
A 7.25-kg block is sent up a ramp inclined at an angle θ = 33.5° from the horizontal. It is given an initial velocity v0 = 15.0 m/s up the ramp. Between the block and the ramp, the coefficient of kinetic friction is μk = 0.397 and the coefficient of static friction is μs = 0.712. How far up the ramp (in the direction along the ramp) does the block go before it comes to a stop?
1 answer · Physics · 1 year ago
• Which bullet is more likely to knock over the block, or are both equally likely to do so? Justify your choice based on physics principles.?

Two bullets of the same size, mass and horizontal velocity are fired at identical blocks, only one is made of steel and the other is made of rubber. The steel bullet has a perfectly inelastic collision with the block, while the rubber bullet has an elastic collision. Which bullet is more likely to knock over the block, or are both equally likely to... show more
Two bullets of the same size, mass and horizontal velocity are fired at identical blocks, only one is made of steel and the other is made of rubber. The steel bullet has a perfectly inelastic collision with the block, while the rubber bullet has an elastic collision. Which bullet is more likely to knock over the block, or are both equally likely to do so? Justify your choice based on physics principles.
1 answer · Physics · 1 year ago
• Explain the reasons for both of these observations in terms of sound production in a piano.?

The wires in a piano have different physical properties. In a grand piano, for example, the piano wires on one end are short and thin, while at the other end they are long and thick, and sometimes the main wire is wrapped with another wire. Explain the reasons for both of these observations in terms of sound production in a piano.
The wires in a piano have different physical properties. In a grand piano, for example, the piano wires on one end are short and thin, while at the other end they are long and thick, and sometimes the main wire is wrapped with another wire. Explain the reasons for both of these observations in terms of sound production in a piano.
1 answer · Classical · 1 year ago
• Based on these data, what is the speed of sound in air?

The speed of sound in air is determined by measuring the distance between two consecutive resonances. A data set for a tuning fork with a frequency of 320 Hz are L1 = 25.8 cm; L2 = 78.4 cm; and L3 = 131.1 cm. Based on these data, what is the speed of sound in air? Hint: the opening at the top is an antinode while the water surface is a node.... show more
The speed of sound in air is determined by measuring the distance between two consecutive resonances. A data set for a tuning fork with a frequency of 320 Hz are L1 = 25.8 cm; L2 = 78.4 cm; and L3 = 131.1 cm. Based on these data, what is the speed of sound in air? Hint: the opening at the top is an antinode while the water surface is a node. Therefore, what fraction of a full wave is L1? What fractions are L2 and L3?
2 answers · Physics · 1 year ago
• If the string is tightened to play a 'Concert A' of 440. Hz as its fundamental/ first harmonic, what is the tension in the violin string?

A violin string is 45.0 cm long and has a mass of 0.242 g. When tightened on the neck of the violin, the distance between the pin and fret is 42.5 cm. If the string is tightened to play a 'Concert A' of 440. Hz as its fundamental/ first harmonic, what is the tension in the violin string?
A violin string is 45.0 cm long and has a mass of 0.242 g. When tightened on the neck of the violin, the distance between the pin and fret is 42.5 cm. If the string is tightened to play a 'Concert A' of 440. Hz as its fundamental/ first harmonic, what is the tension in the violin string?
1 answer · Physics · 1 year ago
• Explain how this works in terms of conservation of mass and energy.?

The figure above is from a classic 1920 physics textbook by Millikan and Gale. It represents a method for raising the water from the pond up to the water tower, at a higher level, without using a pump. Water is allowed into the drive pipe, and once it is flowing fast enough, it forces the valve at the bottom closed. Explain how this works in terms... show more
The figure above is from a classic 1920 physics textbook by Millikan and Gale. It represents a method for raising the water from the pond up to the water tower, at a higher level, without using a pump. Water is allowed into the drive pipe, and once it is flowing fast enough, it forces the valve at the bottom closed. Explain how this works in terms of conservation of mass and energy.
3 answers · Physics · 1 year ago
• Physics Help!!???!!!?

A 150 g block is attached to a 0.6 m long string. The block starts from rest and begins to spin in a circle, accelerating at a constant rate of 0.25 rad/s2 on a horizontal surface. If the string has a maximum tension of 5 N, how long does it take for the string to break? Also, how many revolutions did the block complete when that event occurs?
A 150 g block is attached to a 0.6 m long string. The block starts from rest and begins to spin in a circle, accelerating at a constant rate of 0.25 rad/s2 on a horizontal surface. If the string has a maximum tension of 5 N, how long does it take for the string to break? Also, how many revolutions did the block complete when that event occurs?
1 answer · Physics · 1 year ago
• What is the coefficient of friction between the ramp and the block?

A 300 gram block is pushed up a ramp set at a 20 degree angle with respect to the horizontal. Its initial speed is 1.24 m/s as a result of the initial push, and it travels 14.0 cm up the incline before coming to rest. What is the coefficient of friction between the ramp and the block?
A 300 gram block is pushed up a ramp set at a 20 degree angle with respect to the horizontal. Its initial speed is 1.24 m/s as a result of the initial push, and it travels 14.0 cm up the incline before coming to rest. What is the coefficient of friction between the ramp and the block?
4 answers · Physics · 1 year ago
• What is the coefficient of friction between the ramp and the block?

A 300 gram block is pushed up a ramp set at a 20 degree angle with respect to the horizontal. Its initial speed is 1.24 m/s as a result of the initial push, and it travels 14.0 cm up the incline before coming to rest. What is the coefficient of friction between the ramp and the block?
A 300 gram block is pushed up a ramp set at a 20 degree angle with respect to the horizontal. Its initial speed is 1.24 m/s as a result of the initial push, and it travels 14.0 cm up the incline before coming to rest. What is the coefficient of friction between the ramp and the block?
1 answer · Physics · 1 year ago