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A 270 ball and a 520 ball are connected by a 50.0-cm-long massless, rigid rod. The structure rotates about its center of mass at 120 rpm. What is its rotational kinetic energy?
You arrive home after driving 2 hours and 40 minutes. How far is your hometown from school? What was your average speed?
What is biodiversity? What is biodiversity?
An airplane needs to reach a velocity of 226 km/h to take off. On a 2000 m runway, what is the minimum acceleration necessary for the plane to take flight?
Three beetles stand on a grid. Two beetles have the same weight, W, and the third beetle weighs 2W. (a) The lighter beetles are located at (1.00, 0) and (0, 2.00), and the heavier beetle is at (3.0
If you eat a hamburger, you are mainly eating ground-up beef muscle. What levels of organization are represented in this ground-up muscle?
Jupiter's moon Io orbits Jupiter every 42.5 hours at an average distance of 422,000 kilometers from the center of Jupiter. Calculate the mass of Jupiter.
In the oncoming lane, he sees a car approaching, probably also traveling at 25 m/s. He estimates that the car is about 360 m away. should he attempt to pass.
Write a list describing at least five similarities and three differences between plant and animal cells.
A hanging wire made of an alloy of lead with diameter 0.05 cm is initially 2.6 m long. When a 4 kg mass is hung from it, the wire stretches an amount 3.24 cm. A mole of lead has a mass of 207 grams
An oxygen supply system mixes oxygen at 119 K and room air at 290 K at equal mass flow rates. What is the temperature of the resulting mixture in K? (c of oxygen = 918 J/kgK, c of air = 1012 J/kgK)
A car with a mass of 950-kg and an initial speed of v1 = 21.9 m/s approaches an intersection, as shown in the figure. A 1300-kg minivan traveling northward is heading for the same intersection. The
A rock of mass 40 kg accidentally breaks loose from the edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 234 N. What is the magnitude
the radius of earth is about 6.38x10^3 km. A 7.2 z 10^3 newton spacecraft travels away from earth. What is the weight of the spacecraft at different distances from the surface.
A 8.00 kg object oscillates at the end of a vertical spring that has a spring constant of 2.05 104 N/m. The effect of air resistance is represented by the damping coefficient b = 3.00 N·s/m.
Boat A negotiates a curve whose radius is 364 m. Boat B negotiates a curve whose radius is 140 m. Each boat experiences the same centripetal acceleration. What is the ratio of the speed of boat A t
In the oncoming lane, he sees a car approaching, probably also traveling at 30 m/s. He estimates that the car is about 600 m away. Should he pass?
A 1.39 V potential difference is maintained across a 1.2 m length of tungsten wire that has a cross-section area of .81mm square and the resistivity of tungsten is 5.6 times ten to the negative 8 oh
In an online survey, people were asked if they would cheat on their partner if there was no chance of getting caught. Approximately 23,000 internet users responded to the survey. Almost half of tho
An 90.0 N box of clothes is pulled 24.0 m up a 30.0° ramp by a force of 115 N that points along the ramp. If the coefficient of kinetic friction between the box and ramp is 0.22, calculate the
A hawk flies in a horizontal arc of radius 12.8 m at a constant speed 3.35 m/s. It continues to fly along the same horizontal arc, but increases its speed at the rate of 1.45 m/s2. Find the accelera
Which she crushed to a depth of 26 in. She suffered only minor injuries. Calculate her average acceleration while in contact with the box.
The velocity of a longitudinal sound wave in an ideal gas is given by where γ is the ratio of the specific heat at constant pressure to that at constant volume, P is the pressure, and ρ i
One average force F1 has a magnitude that is three times as large as that of another force F2. Both forces produce the same impulse. The average force F1 acts for a time interval of 1.77 ms. For wh
What should the banking angle of the curves be so that the force of the pavement on the tires of the car is in the normal direction? (Hint: What does this requirement tell you about the frictional f