A turntable is off and is not spinning. A 1.5 g ant is on the disc and is 18 cm away from the center. The turntable is turned on and 1.4 s later it has an angular speed of 33 rpm. Assume the angular acceleration is constant and determine the following quantities for the ant 0.7 s after the turntable has been turned on. Express all quantities using appropriate mks units.
α =
ω =
v =
a_tan =
a_rad =
a =
F_net =

A naval gun aboard a ship is mounted so as to fire at 30◦above the horizontal.Shells fired from this gun have a muzzle velocity of 0.35km/s. The ship makesa direct approach toward a bunker on a high clifftop 150m above sea-level.It is known that the approaches to the shore have been heavily mined andthat no ship can come closer than 5km.At what horizontal range from the bunker should the ship open fire so asto strike the bunker? (Neglect air resistance, the speed of the ship, and theheight of the gun itself above sea-level.)

Looking at a football match, which of the following describes an event CONSISTENT with the study of Classical Mechanics?

a) The ball gains speed by bouncing into a puddle after a player kicks.

(b) A ball leaves the player's foot without rotation and, after colliding with the crossbar, returns to the player's feet faster than at the start of the kick.

c) In a soccer game, there is no mechanical phenomenon related to the study of physics.

d) The fact that the boot is of large or small nails, of metal or plastic, making the player slip more or less on rainy days, concerns the study of universal gravitation.

e) The encounter between a player's boot and the ball at the time of the kick is an example of a partially elastic shock in which there is a transfer of energy and momentum. ”

Analyzing the alternatives of the above question, we can observe in item “a” a phrase widely used by narrators and sports commentators in their radio and TV broadcasts. This phrase contains one of the many conceptual distortions in physics presented in sports broadcasts. Research and present in the COLLABORATIVE CHALLENGE other phrases that exemplify the extremely distorted view of physics.

How could we justify the goalkeeper's difficulty catching a kick in a rainy soccer match? Review the examples presented by your colleagues and indicate the misconceptions in the sentences. What do you think is the convincing power that a statement of this size can inadvertently wield in the minds of sports aficionados?

How do exposure factors differ when comparing conventional analog to CR/DR?

Two objects are said to be in parallel when they both act on the system in the same way, e.g., two forces are in parallel if they have the same direction and are applied at the same point.

A light rod of length 34.6 cm is held aloft from the ceiling by two springs attached to its ends. The left spring has a stiffness of 23.4 kg/s² and equilibrium length of 23.2 cm and the right spring has a stiffness of 18.8 kg/s² and equilibrium length of 25.3 cm. A ring weighing 610 g is placed 25.4 cm from the left spring.

(a) How much does the left spring stretch?
.067 m
(b) How much does the right spring stretch?
.2334 m
Now, mathematically slide the ring to the point that levels the rod.

(c) At what distance from the left spring should you place the ring in order for the rod to be level?
.14147 m
(d) How far from the ceiling is the rod when it's level?
.383 m
Now consider modelling the two springs as if there were only one spring that held the ring aloft.

(e) What is the equilibrium length of the spring?

(f) How much does the spring stretch when the ring is placed on it?

(g) What is the stiffness of the spring?

need help on e-g

1. If a concave mirror has a focal length of 20 cm, at which object distance will an image larger than objects be formed on screen?

a.) 40 cm b.) 30 cm c.) none of the choices d.) 14 cm e.) 50 cm

2. An electron and proton are projected with the same velocity when a uniform magnetic field perpendicular to the velocity of the two charges is applied. The electron follows a circular path of radius 1 mm. What is the radius of the proton's path?

More than anything I need 5 - 7 of this homework. You have been asked by your supervisors at A&L Engineering to design a roller coaster for a new theme park. Because this design is in the initial stages, you have been asked to create a track for the ride. Your coaster should have at least two peaks and two valleys, and launch from an initial height of 75 meters. Each peak and valley should represent a vertical change of at least 20 meters. In your design, you should plan for a mass between 400 and 600 kilograms. Once you have designed the track, you have been asked to calculate the kinetic energy, potential energy, momentum, and work done by the cart at various points throughout the track. Unless otherwise stated, you can ignore the effects of friction. Following your calculations, you have been asked to describe the energy transfers detailed by these equations. Directions To complete this roller coaster design report, complete the following: Create a diagram of a roller coaster track containing at least two peaks and two valleys. As you complete your report, you may wish to design a more complicated coaster. However, it should still have two peaks and two valleys that meet the requirements below and that you are comfortable using in calculations and descriptions of energy and momentum. Your diagram should include the following information: An initial height of 75 meters At least two peaks and two valleys representing drops of over 20 meters A set mass for your roller coaster cart between 400 and 600 kilograms Calculate the kinetic energy, potential energy, and momentum of the cart at the initial drop for both peaks, and for both valleys. If your coaster has more than two peaks and two valleys, select which peaks and valleys you wish to use in your calculations and clearly mark them on your diagram. In your calculations, be sure to explicitly state the equations you use and what values you will be substituting to calculate the final value. Describe the energy transfers that occur as the cart moves along the track. This should be a narrative description of the energy transfers that occur at the initial launching point, peaks, and valleys. In your descriptions, address the following: At each of the identified points, how was kinetic energy transferred to potential energy, and vice versa? What happens to the total energy of the cart as it moves along the track? Why? How is the principle of conservation of energy applied in this situation? In addition to your description of the motion of the cart on the track, you have been asked to model the motion of the cart as it comes to a stop at the end of the coaster. For these calculations, assume that the cart will inelastically collide with a cart of equal mass at rest on a flat surface. Calculate the momentum and kinetic energy of the cart before and after an inelastic collision. In your calculations, be sure to explicitly state the equations you use and what values you will be substituting to calculate the final value. Describe the energy transfers that occur as a cart inelastically collides with an object of equal mass at rest. This should be a narrative description of the energy transfers that occur as the cart inelastically collides with a cart of equal mass. In your descriptions, address the following: What was the kinetic energy of each cart before and after the collision? What happens to the total energy of the system, now including both carts, as a result of the inelastic collision? Describe how the principle of conservation of energy is applied in this situation. Following the inelastic collision of the carts, the two carts fuse into an object with double the mass of the original cart. There is then a frictional section of the track to slow the cart to a stop over 20 meters. Describe the amount of work due to friction and frictional force exerted to stop both carts over 20 meters. Calculate the work due to friction and frictional force. In your calculations, be sure to explicitly state the equations you use and what values you will be substituting to calculate the final value. Describe the energy transfers that occur as the cart is brought to a stop. This should be a narrative description of the energy transfers—written to describe these concepts to a nontechnical audience—that occur as the cart is brought to a stop. In your descriptions, address the following: What is the kinetic energy of the cart system before and after it has been brought to a stop? What happens to the total energy of the system as a result of this change in motion? Describe how the principle of conservation of energy is applied in this situation.

What is the difference between Eo and E1/2?

What is the role of salt bridge in galvanic cells?

. What are the three electrodes employed in voltammetry? And what is their functions?

Please explain your answer thoroughly because I want to understand it well and also please include a diagram if possible

Two objects which have mass: m1 = 10kg and m2 = 20kg. Both of them are moving at the velocity of: v1 = 20^i ms and v2 = 10^j ms and then the two objects collide completely inelastically. In what direction do the two objects go after the collision? After the collision, how much kinetic energy was lost?

10.An AC voltage source is connected in series to an inductor, a capacitor, and a resistor of 8 Ohms. At the frequency when the phase angle is zero, capacitive reactance is 7 Ohms. What is the phase angle between the current and voltage at a frequency which is a factor of 3.2 times less than this frequency? answer in degresss and if negative

6. the resistance of a coil spun in a generator is 2 Ohms. the coil is in a magnetic field of 7.3 milli-tesla. if the coil is square with sides of 0.5 meteres and it is wound 29 times what does its frequency of spin, in Hz,need to be in order to produce a maximum current of 6 amps

An experiment in which 44.00kJ of heat is added to a cube of metal with initial side length 1.00m and temperature 300.K is performed twice, once with a copper cube and once with a lead cube. Fill in the blanks with "<", ">", "=", "N/A". Select N/A only if a comparison is not possible.

The copper cube's initial volume is  the lead cube's.
The copper cube's initial temperature is  the lead cube's.
The copper cube's final temperature is  the lead cube's.
The copper cube's final volume is  the lead cube's.
The copper cube's final mass is  the lead cube's.
The copper cube's final internal energy is  the lead cube's.

An object is being carried that has a mass ML = 50kg. That object's length is L = 10m. One person is lifting the object at the end of the object. The second person is lifting it at a point that is x = L 3 from the other end. How much weight each of the person is carrying? If the first person happens to let go of his end, how much torque does the second person needs to exert to keep object from falling down?

Positive charge A of charge 0.1 mC is placed at the origin of axis x, charge B, also positive, but of magnitude 4 times greater than A is placed at x=24.3 cm. These charges if released will run away from each other, but they are kept in place by the third charge positioned somewhere on the axis x. Find the value of this third charge (in mC).

In the figure below, the hanging object has a mass of m₁ = 0.400 kg; the sliding block has a mass of m₂ = 0.810 kg; and the pulley is a hollow cylinder with a mass of M = 0.350 kg, an inner radius of R₁ = 0.020 0 m, and an outer radius of R₂ = 0.030 0 m. Assume the mass of the spokes is negligible. The coefficient of kinetic friction between the block and the horizontal surface is μ_k = 0.250. The pulley turns without friction on its axle. The light cord does not stretch and does not slip on the pulley. The block has a velocity of v_i = 0.820 m/s toward the pulley when it passes a reference point on the table.

(a) Use energy methods to predict its speed after it has moved to a second point, 0.700 m away.
m/s

(b) Find the angular speed of the pulley at the same moment.
rad/s