Every kind of atom, ion, and molecule produce a unique spectral fingerprint.
true o false

A charge Q is uniformly distributed onto a straight wire of length l. Find the electric at a distance r from the center of the rod. The Gaussian surface and the field line are shown in the figure on the right

Explain why the Atlantic exhibits the anomalous northward heat transport in the southern hemisphere

A particle is found to carry the kinetic energy, K=(γ−1)mc2, which is equal to the energy of a photon. If the speed of the particle is v=0.500c, find the ratio of the wavelength of the photon to the de Broglie wavelength of the particle.

21.	The diagram shows a 0.12-kg square block at four positions along a track. The track is frictionless between points A and B. Elsewhere, the coefficient of static friction on the block is 0.26. Initially, the block is held in place against a spring by a horizontal external force of magnitude 35 N. Then the external force is removed, and the block is projected forward with speed V1=1.2m/s . The block descends a ramp and has speed V2=1.4m/s at the bottom. At point C, its speed is V3=1.4m/s. The block stops at point D. What is the initial compression of the spring?
	0.99 cm 0.49 cm 0.26 cm 0.67 cm 0.18 cm
22.	A 1200-kg car is traveling at 15km/h. A 2400kgtruck has 41 times the kinetic energy of the car. How fast is the truck moving?
	68 km/h 82 km/h 54 km/h 96 km/h

23.	As a marble rolls across the floor, it gradually slows to a stop due to friction. Which statement best describes the change in mechanical energy of this system?
	Mechanical energy was transferred from the floor to the marble. Mechanical energy was transferred from the marble to the floor. The mechanical energy of the marble was transformed into nonmechanical energy. The total energy of the marble and floor, including the mechanical energy, was reduced to zero.
24.	A force is applied to an object in a direction that is perpendicular to the object's displacement. The work performed by the force on the object is ______.
	negative positive zero

25.	A slithering snake travels once around a circle of radius 3.20m . The coefficient of friction between the ground and the snake is 0.25, and the snake's weight is 80.0NHow much work does the snake do against friction?
	800 J 400 J 3900 J 0 J
26.	A car of mass 1091 kg climbs a 5.0° slope at a constant speed of 80.0km/h Assuming that air resistance and friction with the road may be neglected, at what rate must the engine deliver mechanical energy to the car?
	21 kW 31 kW 39 kW 238 kW

27.	A ball is released out a window that is 43 m above the ground. At what speed will it hit the ground? Assume air resistance is negligible.
	0.86 km/s 0 m/s 58 m/s 29 m/s
28.	A glider with mass m = 0.200 kg sits on a frictionless, horizontal air track. It is connected to a spring of negligible mass and force constant k = 5.00 N/m. You pull on the glider to stretch the spring 0.100 m, and then release the glider. The glider begins to move back toward the equilibrium position (x = 0). What is its speed when x = 0.0800 m?
	0.025 m/s 0.300 m/s 0.400 m/s 0.016 m/s

29.	A ramp has the shape of one-fourth of a circle of radius R = 3.00 m. A skateboarder begins at rest at the top of the ramp, then rides to the bottom. What is the skateboarder's speed at the bottom of the ramp? Assume that the effect of friction and other nonconservative forces is negligible.
	2.45 m/s 7.67 m/s 9.39 m/s 8.33 m/s
30.	A total of 87 J of work is needed to stretch a spring from x =1.4m to x =2.9m , in which x is displacement from equilibrium. What is the value of the spring constant?
	27 N/m 39 N/m 52 N/m 77 N/m

In reaching her destination, a backpacker walks with an average velocity of 1.05 m/s, due west. This average velocity results, because she hikes for 5.66 km with an average velocity of 2.54 m/s due west, turns around, and hikes with an average velocity of 0.403 m/s due east. How far east did she walk (in kilometers)?

If two slits are separated by .25cm and the slit to screen is 1m, what is the distance between consecutive maxima for light of wavelength 0.5um? Show steps

How fast, in rpm, would a 130 g , 58-cm-diameter beach ball have to spin to have an angular momentum of 0.15 kg⋅m2/s ? Express your answer using two significant figures.

Which of the following quantities are constant for a projectile during it's flight?

Select all that are True.

a.y

b.v

c. v_x

d. x

e. r

f. a_y

g. v_y

h.  a_x

19.26 A container holds 2.5 g of argon at a pressure of 8.0atm.

Part A

How much heat is required to increase the temperature by 100∘C at constant volume?

Express your answer to two decimal places and include the appropriate units.

Part B

How much will the temperature increase if this amount of heat energy is transferred to the gas at constant pressure?

19.53 A 10 cm -diameter cylinder contains argon gas at 10 atm pressure and a temperature of 60 ∘C . A piston can slide in and out of the cylinder. The cylinder's initial length is 21 cm . 2500 J of heat are transferred to the gas, causing the gas to expand at constant pressure.

Part A

What is the final temperature of the cylinder?

Part B

What is the final length of the cylinder?

Visitors at a science museum are invited to sit in a chair to the right of a full-length diverging lens (f1 = -3.30 m) and observe a friend sitting in a second chair, 1.80 m to the left of the lens. The visitor then presses a button and a converging lens (f2 = +4.50 m) rises from the floor to a position 2.10 m to the right of the diverging lens, allowing the visitor to view the friend through both lenses at once. Find (a) the magnification of the friend when viewed through the diverging lens only and (b) the overall magnification of the friend when viewed through both lenses. Be sure to include the algebraic sign (+ or -) with your answers.

A 0.30-kg ball is thrown with a speed of 7.0m/s at an upward angle of 23?. Use conservation of energy

Part A

What is its speed at its highest point?

Part B

How high does it go?

*Please answer all three parts

Three Part Question: X. (A) NASA Atmospheric Mission balloons use helium that expands to almost 1 million cubic meter at the top of the atmosphere where pressure is 0.003 atm only. Even though it takes about 2.5 hours to get to this altitude, it is assumed that the rise is fast enough to be considered as adiabatic. Find the initial volume of the helium at the ground level. (Helium is a mono-atomic gas). (B) If the initial temperature of the gas was 15 degree celsius what is the temperature of the gas at the top? Ignore real atmospheric temperature changes. (C) What is the change in internal energy of the gas?

*Please provide steps, explanations, and formulas.

*Explain to me as if I know nothing

*I am genuinly trying to learn and understand. Please and thank you.

1.) What is the absolute pressure of the air in your car's tires, in psi, when your pressure gauge indicates they are inflated to 35.0psi ? Assume you are at sea level.

2.)A Jaguar XK8 convertible has an eight-cylinder engine. At the beginning of its compression stroke, one of the cylinders contains 499 cm3 of air at atmospheric pressure

(1.01

A thin 0.200-kg rod that is 350 mm long has a small hole drilled through it 87.5 mm from one end. A metal wire is strung through the hole, and the rod is free to rotate about the wire.

A. Determine the rod's rotational inertia I about this axis.

B. Determine the period of the rod's oscillation.