Question

1. A hydraulic lift uses a compressor to compress the hydraulic fluid with a moving piston (piston A) of radius RA = 4.83 cm. A second piston (piston B) of radius RB = 18.48 cm is used at the lift to lift cars. What force must be applied by piston A to lift a 14,871N car with piston B?

2. When a 0.438 kg mass is hung from a certain spring it stretches 0.119 m to its equilibrium position at point P. If this mass is pulled down 0.155 m from point P and released, what is the magnitude of the velocity in m/s of this mass 0.0378 m from point P?

3. When a 0.481 kg mass is hung from a certain spring it
stretches 0.156 m to its equilibrium position at a point P. If this
mass is pulled down 0.14 m from point P and released, what is the
magnitude of the maximum acceleration of the mass in
m/s^{2}?

4. Water (Density_{water} = 1,000 kg/m^{3})
flows through a pipe that narrows. At point A it is determined that
the water flows with a velocity of _{VA} = 98 m/s. At point
B it is determined that the water flows with a velocity of
V_{B} = 220 m/s.What is the nagnitude of the difference in
pressure between points A and B.

5. It is determined that for a certain piano string waves travel with a velocity of 293 m/s. What is the frequency of vibration of this string (which is attached at both ends) if it is 0.71 meters long and has 4 nodes?

6. A pipe with an internal diameter of 2.41 cm attaches to a hose with an internal diameter of 1.188 cm. It is determined that water flows through the pipe with a velocity of 0.706 m/s. With what velocity does the water flow through the hose?

7. Two trains pass each other. Train A is traveling 32 m/s east. Train B is traveling 19 m/s west. After the trains pass each other train A blows its whistle with a frequency of 554 Hz. What frequency does a person on train B hear? Assume 343 m/s as the speed of sound.

Answer #1

a) A 2.43 m long cord is attached to the ceiling. A mass m =
0.250 kg is suspended at the end of the cord. The cord is pulled to
the side a few centimeters and released. What is the period of
oscillation?
b) It is determined that for a certain piano string waves travel
with a velocity of 303 m/s. What is the frequency of vibration of
this string (which is attached at both ends) if it is 0.702...

When a 0.411 kg mass is hung from a certain spring it stretches
0.148 m to its equilibrium position at point P. If this mass is
pulled down 0.139 m from point P and released, what is the
magnitude of the velocity in m/s of this mass 0.041 m from point
P?

When a 0.427 kg mass is hung from a certain spring it stretches
0.122 m to its equilibrium position at point P. If this mass is
pulled down 0.151 m from point P and released, what is the
magnitude of the velocity in m/s of this mass 0.0392 m from point
P? A 1.42 m3 piece of wood with a density of 0.805 kg/m3 floats in
the ocean where the density of the water is 1.027 kg/m3. What is
the...

A piston (with mass M = 2.0 kg) in a car engine is in vertical
simple harmonic motion with amplitude A = 5.0 cm. If the engine is
running at 3556 rev/min,
(a) What is the maximum velocity (m/s) of the piston?
(b) What is the maximum acceleration (m/s2) of the piston?
Suppose a small 100 g piece of metal were to break loose from the
surface of the piston
when it (the piston) is at the lowest point (z...

1.A horizontally suspended 3.0 m track for fluorescent lights is
held in place by two vertical beams that are connected to the
ceiling. The track and lights jointly weigh 40 N. One beam is
attached 20 cm from one end of the track and the other beam is
attached 50 cm from the opposite and of track. What upward force
does each beam apply to the track?
2.Three 5.0 kg spheres are distributed as follows. Sphere A is
located at...

1. A wave train is traveling along a string. Seven waves pass by
a point in 3.75 s. The
distance from the top of a crest to the bottom of an adjacent
trough is 0.462 cm. Find:
a) the speed of the waves.
b) the tension in the string if it has a length of 1.68 m and a
mass of 3.86 g.
2. Suppose that the string in problem #1 is attached to a second
string whose linear
density...

Question 1 A steam turbine drives an electric generator (so
the turbine delivers shaft work). The inlet steam flows through a
12.0 cm diameter pipe to the turbine at the rate of 2.50 kg/s at
600.0 °C and 10.0 bar absolute. The exit steam discharges through a
25.0 cm diameter pipe at 400.0 °C and 1.00 bar absolute. The
turbine is adiabatic, and the process is at steady state. Neglect
the potential energy effects.
̇
(a) Calculate ∆Ek term for...

A B C D E 10. With the temperature held constant, the pressure
of a gas in a cylinder with a movable piston is increased from 30
kPa to 90 kPa.
The initial volume of the gas in the cylinder is 0.6 m^3. What
is the
final volume of the gas after the pressure is increased? a) 36
m^3,
b) 0.2 m^3, c) 18 m^3, d) 54 m^3, e) there is no change in
volume.
A B C D E...

1. A 25 kg skydiver has a speed of 20 m/s at an altitude of 350
m above the ground. Determine the kinetic energy possessed by the
skydiver.
2. If a cruise ship travels 150 km to the south and then 250 km to
the west, what is the ship’s displacement from its starting
point?
3. A train is accelerating at a rate of 5 m/s . If its initial
velocity is 15 m/s, what is its speed after 10...

1. A cord of mass 0.65 kg is stretched between two supports 8.0
m apart. If the tension in the cord is 140 N, how long will it take
a pulse to travel from one support to the other?
2. A 50.0 Kg ball hangs from a steel wire 1.00 mm in diameter
and 6.00 m long. What would be the speed of a wave in the steel
wire?
3. The intensity of an earthquake wave passing through the earth...

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