A massless rod of length L = 2.3 m stands up straight, fixed to the ground by a bolt. A horizontal force of 8.2 N is applied at a vertical distance of L/2 to the right. To counter this force and keep the rod stationary, a wire is fixed at the top of the rod and attached to the ground some distance away to the left, making an angle of 45 degrees to the horizontal.

a) What is the tension in the wire, in N?

Answer: 5.798

b) Calculate the horizontal component of the force of the bolt on the rod, in N, taking right as positive.

Answer: -4.1

c) Calculate the vertical component of the force of the bolt on the rod, in N, taking up as positive.

Answer: 4.1

Suppose you’re building a contraption which contains a solid rod of length L = 11.1 m and mass 4.5 kg. This rod has its lower end barely above the ground at an angle of 23.7 degrees with respect to the horizontal, and is ultimately held up by a rope connected at a distance L/4 from the top of the rod making an angle of 25.4 degrees with respect to the rod. The top of the rod may rotate as it is held in place by a bolt connected to a wall. Calculate the tension in the rope which keeps the rod from touching the ground.

Answer: 188.475

Could you please write down the full solution?

Powder specimens of three different monoatomic cubic crystals are analyzed with a Debye-Scherrer camera. It is known that one sample is fcc, one is bcc, and one has the diamond structure. The approximate positions of the first four diffraction rings in each case are: A: 42.2, 49.2, 72.2, 87.3; B: 28.8, 41.0, 50.8, 59.6; C: 42.8, 73.2, 89.0, 115.0 (a) Identify the crystal structures of A, B, and C. (b) If the wavelength of the incident x-ray beam is 1.5Å, what is the length of the side of the conventional cubic cell in each case?

There is already an answer on Chegg for this question, but it doesnt elaborate on why things were done, I don't understand how to work backwards from the angles to get the structure

Brakes are applied to a 3000-kg car moving at 30 m/s. The car skids 200 m and stops. What is the coefficient of kinetic friction?

1. A vehicle (truck A), with a mass of 1800 kg, is tested for safety at a lab by having another vehicle (truck B) crash into it from behind. Initially, Truck A is at rest and truck B approaches at about 45 km/hr. After the crash, truck B recoils back at 10 km/hr, while truck A is pushed forward at 27 km/hr. Remember to give all answers in standard units. (This collision would likely be inelastic.)

1. Draw a sketch showing the trucks before AND after the collision, with your directions properly labeled.

2. Given these results, what must have been the mass of truck B? (Assume neither car lost any mass during the collision.)

1. How much did the total energy of the system (A + B) change? Was this change a gain or a loss of energy?

Mrs. Cunningturkey works at Mabash College as an executive assistant to the universally reviled President Less. President Less is widely known to care nothing about students, and every day chooses a random student car to tow away and crush for scrap metal.

On Monday morning, Mrs. Cunningturkey arrives to President Less’ office promptly at 0750. There she discovers the corpse of President Less and the murder weapon: a chicken leg from the nearby Starks Center. The body shows clear signs of blunt force trauma. At 0800, detectives from the Trawfordshire Police Department arrive and begin an investigation. The coroner notes that the temperature of the corpse is 32◦C and that the room temperature is 25◦C. Two hours later, the corpse is 31◦C. Assume that normal human body temperature is 37◦C.

The following people were seen in the vicinity of President Less’ office over the weekend:

• Professor Trix, who sometimes smokes cigars with President Less, was noticed leaving the building at 2200 the night before. However, President Less recently smoked a bunch of the professor’s favorite Cubans without him.

• Major Mustard, who is in charge of the Car Towing and Crushing Brigade, was seen in the parking lot at 2100 the night before. Major Mustard and President Less recently had an argument about money raised from the towing and crushing business. Major Mustard was especially concerned with the fact that another university’s towing and crushing business might ketchup.

• Muscles McTouchdown, captain of the football team and recent tow/crush victim, was seen running across campus towards the Beta Rho Omicron fraternity at midnight. He was overheard muttering “I’ve got him this time!

• Mark Bosak, a frequent critic of President Less in the campus publication The Spouseless, was seen walking in the direction of President Less’ office at 0100.

Investigators from the Trawfordshire Special Mathematics Unit also become involved, since mathematical crimes are considered especially heinous (these are their stories). They discover that President Less had been secretly embezzling funds from the tow/crush scheme. In 2018, he decided to take money he had made from the scheme and park it in two different banks:

• $10,000 with Tax-Dodge Bank, of the Cayman Islands. The account pays 5% interest compounded monthly.

• $15,000 with Euler Bank, based in Switzerland. This account pays only 4% but, befitting the name, compounds continuously.

(1) How fast is the body cooling at 0800? At 1000?

(2) Who is your chief suspect for the murder of President Less, and why?

(3) How much money will be in both secret bank accounts after 25 years?

Submit your evidence to your instructor by 1600 Friday. Your writing and exposition should be clear and concise, and good enough that a juror who knows some calculus (but not about Newton’s Law of Cooling or compound interest) would be able to read it!

If 200 g of ice at 0°C and 50 g of steam at 100°C interact thermally in a well-insulated container. The final state of the system will be;

( is loved it and got Tf= 64C ) ( so please choose an answer from the following multiple choices )

(a) A water steam mixture at 100°C
(b) Water at a temperature between 0°C and 50°C (c) 0.089 kg
(d) 0.12 kg
(e) A ice-water mixture at 0°C

a) Identify two attractive forces at work in an atom, and identify the kinds of particles each force acts between.

A farm truck moves due north with a constant velocity of 12.00 m/s on a limitless horizontal stretch of road. A boy riding on the back of the truck throws a can of soda upward and catches the projectile at the same location on the truck bed, but 19.0 m farther down the road.

Using appropriate fundamental therems of vector calculus derive macroscopic Maxwell's equations from microscopic equations with every detail.

Describe why some stars, such as white dwarfs and neutron stars become degenerate. What are the two fundamental physics principles that underpin the concept of degeneracy?

On a scale where the Sun is about the size of a grapefruit (7 centimeters) and the Earth is about 15 meters away, how far away from Earth is the nearest star? A) about 7×10−2 meters. B) about 2×101 meters. C) about 5×103 meters. D) about 5×106 meters. E) There is not enough information to tell.