• A spring with a spring constant of 1200 N/m has a 55-g ball at its end. The energy of the system is 4.0 J?

What is the amplitude A of vibration? What is the maximum speed of the ball? What is the speed when the ball is at a position x=+A/2
What is the amplitude A of vibration? What is the maximum speed of the ball? What is the speed when the ball is at a position x=+A/2
1 answer · Physics · 2 years ago
• Chemistry?

An ideal gas in a sealed container has an initial volume of 2.60 L. At constant pressure, it is cooled to 25.00 °C where its final volume is 1.75 L. What was the initial temperature?
An ideal gas in a sealed container has an initial volume of 2.60 L. At constant pressure, it is cooled to 25.00 °C where its final volume is 1.75 L. What was the initial temperature?
1 answer · Chemistry · 2 years ago
• Chemistry?

When 1277 J of heat energy is added to 39.2 g of hexane, C6H14, the temperature increases by 14.4 °C. Calculate the molar heat capacity of C6H14
When 1277 J of heat energy is added to 39.2 g of hexane, C6H14, the temperature increases by 14.4 °C. Calculate the molar heat capacity of C6H14
1 answer · Chemistry · 2 years ago

The man wants to try bungee jumping, but want to make sure it is safe. The brochure provided at the ticket office says that the cord holding the jumper is initially 10 m long and has a spring constant of 155 N/m . The tower from which you plan to jump appears to be 10 floors high. Each floor is 10 ft high. Mass of man is 62 kg Find the maximum cord... show more
The man wants to try bungee jumping, but want to make sure it is safe. The brochure provided at the ticket office says that the cord holding the jumper is initially 10 m long and has a spring constant of 155 N/m . The tower from which you plan to jump appears to be 10 floors high. Each floor is 10 ft high. Mass of man is 62 kg Find the maximum cord length when stretched
1 answer · Physics · 2 years ago

Part A Jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. He holds the rope 25∘ above the horizontal. The rope exerts a 20-N tension force on the wagon. How much work does the rope do on the wagon?
Part A Jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. He holds the rope 25∘ above the horizontal. The rope exerts a 20-N tension force on the wagon. How much work does the rope do on the wagon?
1 answer · Physics · 2 years ago
• Physics help?

A 10-kg sled carrying a 30-kg child glides on a horizontal, frictionless surface at a speed of 6.0 m/s toward the east. The child jumps off the back of the sled, propelling it forward at 20 m/s. What was the child's velocity in the horizontal direction relative to the ground at the instant she left the sled?
A 10-kg sled carrying a 30-kg child glides on a horizontal, frictionless surface at a speed of 6.0 m/s toward the east. The child jumps off the back of the sled, propelling it forward at 20 m/s. What was the child's velocity in the horizontal direction relative to the ground at the instant she left the sled?
3 answers · Physics · 2 years ago
• A cannon mounted on the back of a ship fires a 50-kg cannonball in the horizontal direction at a speed of 150 m/s.?

If the cannon and ship have a combined mass of 40000 kg and are initially at rest, what is the speed of the ship just after shooting the cannon?
If the cannon and ship have a combined mass of 40000 kg and are initially at rest, what is the speed of the ship just after shooting the cannon?
2 answers · Physics · 2 years ago

A sample of gas occupies a volume of 50.4 mL. As it expands, it does 126.4 J of work on its surroundings at a constant pressure of 783 torr. What is the final volume of the gas?
A sample of gas occupies a volume of 50.4 mL. As it expands, it does 126.4 J of work on its surroundings at a constant pressure of 783 torr. What is the final volume of the gas?
1 answer · Chemistry · 2 years ago
• Chemistry help?

A sample of gas occupies a volume of 50.4 mL. As it expands, it does 126.4 J of work on its surroundings at a constant pressure of 783 torr. What is the final volume of the gas?
A sample of gas occupies a volume of 50.4 mL. As it expands, it does 126.4 J of work on its surroundings at a constant pressure of 783 torr. What is the final volume of the gas?
1 answer · Chemistry · 2 years ago
• Physics help?

A 2.0-m-long, 21-kg ladder is resting against a house wall, making a 26 ∘ angle with the vertical wall. The coefficient of static friction between the top of the ladder and the wall the coefficient is 0.00. Determine the magnitude of the normal force of the wall on the ladder.
A 2.0-m-long, 21-kg ladder is resting against a house wall, making a 26 ∘ angle with the vertical wall. The coefficient of static friction between the top of the ladder and the wall the coefficient is 0.00. Determine the magnitude of the normal force of the wall on the ladder.
1 answer · Physics · 2 years ago
• Physics help!?

You hang a light in front of your house using an elaborate system to keep the 1.5-kg light in static equilibrium (Figure 1) . What are the magnitudes of the forces that the ropes must exert on the knot connecting the three ropes if θ2 = 37∘ and θ3 = 0∘?
You hang a light in front of your house using an elaborate system to keep the 1.5-kg light in static equilibrium (Figure 1) . What are the magnitudes of the forces that the ropes must exert on the knot connecting the three ropes if θ2 = 37∘ and θ3 = 0∘?
3 answers · Physics · 2 years ago
• Chemistry help please. Naming the bond types.?

A. sp2 + sp2 and pz + pz B. s + sp C. sp + sp and px + px and pz + pz D. sp2 + sp3
A. sp2 + sp2 and pz + pz B. s + sp C. sp + sp and px + px and pz + pz D. sp2 + sp3
1 answer · Chemistry · 2 years ago

uppose that your professor decides to lecture while sitting on a 20 kg beam of length L. Apply the conditions of equilibrium separately to the professor and to the beam. Use the equations to determine the force of the cable on the beam and the force that the professor exerts on the beam. The gravitational force that the Earth exerts on the professor... show more
uppose that your professor decides to lecture while sitting on a 20 kg beam of length L. Apply the conditions of equilibrium separately to the professor and to the beam. Use the equations to determine the force of the cable on the beam and the force that the professor exerts on the beam. The gravitational force that the Earth exerts on the professor is 600 N.
1 answer · Physics · 2 years ago
• Chem 111 help?

1. What cation will be in solution when each of the following compounds are dissolved in water? a) Ca(NO3)2 e) Mg(NO3)2 b) CuSO4 f) SnCl4 c) FeSO4 g) Zn(NO3)2 d) Fe(NO3)3 h) HCl
1. What cation will be in solution when each of the following compounds are dissolved in water? a) Ca(NO3)2 e) Mg(NO3)2 b) CuSO4 f) SnCl4 c) FeSO4 g) Zn(NO3)2 d) Fe(NO3)3 h) HCl
1 answer · Chemistry · 2 years ago
• Chem 11 help?

Current pennies are composed of a zinc core with a thin outer layer of copper. Using your activity series predict what would happen if you put a penny into hydrochloric acid? What about if you cut a penny in half and put it in hydrochloric acid.
Current pennies are composed of a zinc core with a thin outer layer of copper. Using your activity series predict what would happen if you put a penny into hydrochloric acid? What about if you cut a penny in half and put it in hydrochloric acid.
1 answer · Chemistry · 2 years ago
• Physics help!!?

2. Suppose that your professor decides to lecture while sitting on a 20 kg beam of length L. Apply the conditions of equilibrium separately to the professor and to the beam. Use the equations to determine the force of the cable on the beam and the force that the professor exerts on the beam. The gravitational force that the Earth exerts on the... show more
2. Suppose that your professor decides to lecture while sitting on a 20 kg beam of length L. Apply the conditions of equilibrium separately to the professor and to the beam. Use the equations to determine the force of the cable on the beam and the force that the professor exerts on the beam. The gravitational force that the Earth exerts on the professor is 600 N. The Angle is at 37 degrees.
1 answer · Physics · 2 years ago
• Indicate the direction of polarity of each of the following covalent bonds by dragging the delta notation to each end of the bond?

C-O O-CL O-F C-N CL-C S-H S-CL
C-O O-CL O-F C-N CL-C S-H S-CL
2 answers · Chemistry · 2 years ago
• Fill in each blank with the correct word. Your options are: "easier" or "harder".?

The greater the ionization energy of an atom, the ( ) it is to remove an electron. The greater (or more negative) the electron affinity of an atom, the ( ) it is to add an electron
The greater the ionization energy of an atom, the ( ) it is to remove an electron. The greater (or more negative) the electron affinity of an atom, the ( ) it is to add an electron
1 answer · Chemistry · 2 years ago
• Rank the following ionic solids in order of increasing lattice energy: 1 = weakest lattice energy, 4 = strongest lattice energy?

KCL, KBr, AlCl, MgCl2
KCL, KBr, AlCl, MgCl2
1 answer · Chemistry · 2 years ago
• Determine the acceleration of Earth due to its motion around the Sun. Assume the Earth's orbit to be circular with a radius of 1.5×108km.?

2 answers · Physics · 2 years ago