an ideal gas has C_v=(7/2)R. A 2.00 mole sample of gas starts at P=1*10^5 Pa and T=300K. determine the total P, V&T for each of the following cases, as well as ΔE_int, W and Q

a) gas is heated at constant P to 400K

b) gas is heated at constant V to 400K

c) isothermal conpression to P=1.2*10^5 Pa

d) adiabatic to compression P= 1.2*10^5

Which of the following types of energy can be considered "mechanical" energy? (Select all that apply.)

A rocket is launched at an angle of 50.0° above the horizontal with an initial speed of 102 m/s. The rocket moves for 3.00 s along its initial line of motion with an acceleration of 30.0 m/s². At this time, its engines fail and the rocket proceeds to move as a projectile.

(a) Find the maximum altitude reached by the rocket.
  m

(b) Find its total time of flight.
  s

(c) Find its horizontal range.

A cart is attached to a hanging mass by a string that passes over a pulley. a) Draw free-body diagrams for the cart and the hanging mass (Clearly label all forces present and indicate their relative magnitudes) when the cart is moving:(i) on a horizontal track.(ii) up a track inclined at an angle .b) When the cart moves on an incline at constant speed, it is in equilibrium; i.e., the net force on it is zero. Does it require more, less, or the same tension in the string to pull the cart up the track at constant speed or down the track at constant speed? Explain your answer.c)Derive an equation for the work done by friction when the cart is moving up the track at constant speed. Show your work.

Question 5: Describe why pulling a heavy object seems more hazardous than pushing it.

Question 6: What is the difference between local and whole body strength?

(a) By what percent does the period of a simple pendulum change if you double its amplitude? (Assume the amplitude is small.)

0%

41%    

70%

100%

(b) By what percent does the period of a simple pendulum change if you double its mass?

0%

41%    

70%

100%

(c) By what percent does the period of a simple pendulum change if you double its length?

0%

41%   

70%

100%

A flask with a volume of 1.50L , provided with a stopcock, contains ethane gas (C2H6) at a temperature of 310K and atmospheric pressure 1.013

A 4.92 kg particle-like object moves in a plane with velocity components v_x = 43.2 m/s and v_y = 35.7 m/s as it passes through the point with (x, y) coordinates of (5.46, -8.28) m. Just then, in unit-vector notation, what is its angular momentum relative to (a) the origin and (b) the point (-8.30, -8.30) m?

(a) Determine the amount of work (in joules) that must be done on a 103 kg payload to elevate it to a height of 1007 km above the Earth's surface.
  MJ
(b) Determine the amount of additional work that is required to put the payload into circular orbit at this elevation.
J

Sand moves without slipping at 6.0 m/s down a conveyer that is tilted at 15?. The sand enters a pipe h = 2.2m below the end of the conveyer belt, as shown in the figure.

What is the horizontal distance d between the conveyer belt and the pipe?

I REALLY NEED TO LEARN THIS PROBLEM INSIDE OUT. PLEASE BE AS DERCRIPTIVE AND CLEAR AS YOU CAN BE PLEASE ( AS IF YOU WERE TEACHING A PERSON WHO KNOWS NOTHING ABOUT PHYSICS) thank so much

1. a rock is dropping from a sea cliff and the sound of it striking the ocean is heard 3.4 s later. if the speed of sound is 340 m/s, how high is the cliff?

A 29.0-kg block is initially at rest on a horizontal surface. A horizontal force of 76.0 N is required to set the block in motion, after which a horizontal force of 57.0 N is required to keep the block moving with constant speed.

(a) Find the coefficient of static friction between the block and the surface.

(b) Find the coefficient of kinetic friction between the block and the surface.

Two loudspeakers are located 3.50 m apart on an outdoor stage. A listener is 19.3 m from one and 20.2 m from the other. During the sound chek, a signal generator drives the two speakers in phase with the same amplitude and frequency. The transmitted frequency is swept through the audible range (20 Hz - 20 kHz). The speed of sound in the air is 343 m/s. What are the three lowest frequencies that give minimum signal (destructive interference) at the listener's location?

(a)  Hz (lowest)

(b)  Hz (second lowest)

(c)  Hz (third lowest)

What are the three lowest frequencies that give maximum signal (constructive interference) at the listener's location?

(d)  Hz (lowest)

(e)  Hz (second lowest)

(f)  Hz (third lowest)