Question

What is the change in length of a metal rod with an original length of 4...

  1. What is the change in length of a metal rod with an original length of 4 m, a coefficient of thermal expansion of 0.00002/ ° C, and a temperature change of 30° C?

    1.

    2.4 mm

    2.

    12 mm

    3.

    1.2 mm

    4.

    24 mm

  2. Determine the number of electrons passing through a point in the wire in 8 minutes when the current is 10 A.

    a.

    3 * 1016 electrons

    b.

    none of these

    c.

    4,800 electrons

    d.

    1.6 * 1019 electrons

  3. Points A and B have electric potentials of 12 V and 20 V, respectively. How much work would be required to take 3 C of positive charge from A to B?

    1.

    36 J

    2.

    24 J

    3.

    60 J

    4.

    zero

  4. *A patient has a body temperature of 310 K. Should you be concerned?

    Not really, it's 101 degrees Fahrenheit

    Not terribly, it's 97 degrees Fahrenheit

    No, it's 98.6 degrees Fahrenheit

  5. You are riding on a roller coaster. Which case would produce a zero acceleration?

    a.

    roller coaster making a sharp turn

    b.

    roller coaster speeding up down a hill

    c.

    roller coaster slowing down up a hill

    d.

    none of the choices

  6. A 3.0 cm tall object is placed along the principal axis of a thin convex lens of 30.0 cm focal length. If the object distance is 40.0 cm, which of the following best describes the image distance and height, respectively?

    17.3 cm and 7.0 cm

    120 cm and 9.0 cm

    17.3 cm and 1.3 cm

    120 cm and 1.0 cm

  7. A 1 000-kg sports car accelerates from zero to 25 m/s in 7.5 s. What is the average power delivered by the automobile engine?

    20.8 kW

    30.3 kW

    41.7 kW

    52.4 kW

  8. What is the total pressure on a diver at a depth of 45 m under the sea? Atmospheric Pressure is 101 kPa. The density of sea water is 1,025 kg/m3.

    a.

    553 kPa

    b.

    none of the choices

    c.

    0 Pa

    d.

    101 kPa

  9. An ACME operating table has four legs. Each leg is square, closed on the end and measures 0.10m X 0.10m. If the table weighs 1200 N and the patient on the table weighs 800 N, determine the total pressure exerted on the operating room floor.

    a.

    100,000 Pa

    b.

    200,000 Pa

    c.

    2,000 Pa

    d.

    50,000 Pa

  10. The pressure on an oxygen tank reads 300 kPa. An equivalent reading is

    a.

    300 Pa

    b.

    43.5 psi

    c.

    4 atm

    d.

    100 mm Hg

  11. If water is moving at a speed of 0.25 m/s through a tube with a cross-sectional area of 0.05 m2, what is the flow rate?

    .013 m3/s

    .05 m3/s

    .25 m3/s

    5 m3/s

  12. An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N. The radius of the planet is 4.0 ´ 10 6 m. What is the mass of Planet X? ( G = 6.67 ´ 10 -11 N ×m 2/kg 2)

    13 ´ 1019 kg

    17 ´ 1022 kg

    9.6 ´ 1024 kg

    21 ´ 1025 kg

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1. A Ferris wheel starts at rest and builds up to a final angular speed of...
1. A Ferris wheel starts at rest and builds up to a final angular speed of 0.70 rad/s while rotating through an angular displacement of 4.9 rad. What is its average angular acceleration? 0.10 rad/s2 0.05 rad/s2 1.8 rad/s2 0.60 rad/s2 2. An ACME operating table has four legs. Each leg is square, closed on the end and measures 0.10m X 0.10m. If the table weighs 1200 N and the patient on the table weighs 800 N, determine the total...
What is the total hydrostatic pressure 250 cm below the surface of water which is open...
What is the total hydrostatic pressure 250 cm below the surface of water which is open to the air at sea level? a) 24.5 kPa b) 24.6 kPa c) 103.8 kPa d) 125.8 kPa 2. What is the buoyant force on an object of density 400 kg/m3 and total volume of 1.5 m3 when the object is held and submerged in water so that 20% of its volume is above the surface of water? a) 1176 N b) 4704 N...
1. Calculate the number of moles in an ideal gas trapped in a cylinder of diameter...
1. Calculate the number of moles in an ideal gas trapped in a cylinder of diameter .7 cm and a height of 10 cm, when pressure is at 1555 N/m2 at 6600 K. a) 7.9 x 10-17 b) 6.2 x 10-23 c) 1.09 x 10-7 d) 1.2 x 10-2 2. Convert 1700 degrees Fahrenheit to the Kelvin temperature scale. a) 1200 K b) 973 K c) 838 K d) 644 K 3. How much power is generated when a 78...
-A Carnot engine operates between a 1500 C reservoir and a -20 C reservoir. What is...
-A Carnot engine operates between a 1500 C reservoir and a -20 C reservoir. What is the efficiency of the engine? Optional Answers: 83% - a-A fluid with viscosity 1.2 Pa s moves through a 200-m-long pipe with a 20 cm diameter. What is the resistance to laminar flow, R, in the pipe? Optional Answers: 1. 6.1x10^6 Pa s/m^3 2. 3.8x10^5 Pa s/m^3 3. 3.8x10^-3 Pa s/m^3 4. 6.1x10^-2 Pa s/m^3 b- A fluid with viscosity 1.2 Pa s moves...
7.2 A Brayton cycle gas engine is analyzed using the air standard method. Given the conditions...
7.2 A Brayton cycle gas engine is analyzed using the air standard method. Given the conditions at state 1, pressure ratio (rp), and cutoff ratio (rc) determine the efficiency and other values listed below. The specific heat ratio and gas constant for air is given as k=1.4 and R=0.287 kJ/kg-K respectively. T1 (K) = 333 P1 (kPa) = 170 rp = 10.7 rc = 2.54 AV (m3/s) = 1.7 a) Determine the specific enthalpy (kJ/kg) at state 1. b) Determine...
The assembly shown in the figure below consists of a thin rod of length ℓ =...
The assembly shown in the figure below consists of a thin rod of length ℓ = 23.2 cm and mass m = 1.20 kg with a solid sphere of diameter d = 10.0 cm and mass M = 2.00 kg attached to its top. The assembly is free to pivot about a frictionless axle through the bottom of the rod. The assembly is initially vertical and at rest when it starts to rotate clockwise. A thin rod of length ℓ...
21) A person carries a 25.0-N rock through the path shown in the figure, starting at...
21) A person carries a 25.0-N rock through the path shown in the figure, starting at point A and ending at point B. The total time from A to B is 1.50 min. How much work did gravity do on the rock between A and B? A) 625 J B) 20.0 J C) 275 J D) 75 J E) 0 J 22) A person carries a 2.00-N pebble through the path shown in the figure, starting at point A and...
The tube shown has a length of 2.00 m and a diameter of 1.00 mm. Water...
The tube shown has a length of 2.00 m and a diameter of 1.00 mm. Water at 40° C is flowing through the tube. For water at 40° C: A) What pressure difference is required to give the water a flow speed of 4.0 m/s? (Give your answer in units of Pa.) B) What force applied to the end of the tube will produce this pressure? (Give your answer in units of N.) C) What is the volume flow rate...
Air under standard conditions (ñ=1.23 kg/m3, µ=1.79 x 10 -5) flows through a 4- mm diameter...
Air under standard conditions (ñ=1.23 kg/m3, µ=1.79 x 10 -5) flows through a 4- mm diameter drawn tubing with an average velocity of V = 50 m/s. For such conditions the flow would normally be turbulent. However if precautions are taken to eliminate disturbances to the flow (the entrance to the flow is very smooth, the air is dust free, the tube does not vibrate etc.), it may be possible to maintain laminar flow. What is the pressure drop in...
A smooth tube 5 cm in diameter and 450 cm in length is placed inside another...
A smooth tube 5 cm in diameter and 450 cm in length is placed inside another tube larger in diameter. Air enters the smaller diameter tube at a pressure of 5 bars, a mean temperature of 16 oC , and at a flow rate of 29 gm/s. saturated steam at 1.523 bar in the annulus between the two tubes condenses on the surface 0f the inside tube find: The outlet temperature of air The outlet pressure of air The mass...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT