# An airplane flies due south at 155 km/h relative to the

Get college assignment help at uniessay writers An airplane flies due south at 155 km/h relative to the air. There is a wind blowing at 89 km/h to the east relative to the ground. What are the plane’s speed and direction relative to the ground?

## The dipole moment of a water molecule is 6.2 times 10^{

The dipole moment of a water molecule is 6.2 times 10^{ – 30};{rm C} {rm m} . What is the electric potential 1.0 nm from a water molecule along the axis of the dipole?

## If wind blows at 45 m/s over a house, what is

If wind blows at 45 m/s over a house, what is the net force on the roof if its area is 330 m^2 and is flat? Express your answer using two significant figures.

## A 40.0 ball of clay traveling east at 6.00 collides and

A 40.0 ball of clay traveling east at 6.00 collides and sticks together with a 20.0 ball of clay traveling north at 5.00 . What is the speed of the resulting ball of clay?

## ssm Speedboat A negotiates a curve whose radius is 120 m.

ssm Speedboat A negotiates a curve whose radius is 120 m. Speedboat B negotiates a curve whose radius is 240 m. Each boat experiences the same centripetal acceleration. What is the ratio vA/vB¬ of the speeds of the boats?

## A 260 g block on a 52.0 cm-long string swings in

A 260 g block on a 52.0 cm-long string swings in a circle on a horizontal, frictionless table at 85.0 rpm.What is the speed of the block and tension in the string?

## a box sits at rest on a rough 30 degree inclined

a box sits at rest on a rough 30 degree inclined plane. draw a free body diagram showing the forces acting on the box

## an airplane accelerates from a velocity of 21 m/s at the

an airplane accelerates from a velocity of 21 m/s at the constant rate of 3.0 m/s squared over 535 m. What is its final velocity?

## Blocks with masses of 2 , 3 , and 5 are

Blocks with masses of 2 , 3 , and 5 are lined up in a row on a frictionless table. All three are pushed forward by a 59 force applied to the 2 block. How much force does the 3 kg black exert on the 5 kg block?

## A wrecking ball (weight = 5000 N) is supported by a

A wrecking ball (weight = 5000 N) is supported by a boom, which may be assumed to be uniform and has a weight of 4000 N. As the drawing shows, a support cable runs from the top of the boom to the tractor. The angle between the support cable and the horizontal is 32°, and the angle between the boom and the horizontal is 48°.Find the tension in the support cable. Find the magnitude of the force exerted on the lower end of the boom by the hinge at point?

## if a four-engine jet accelerates down the runway at 2 m/s

Get college assignment help at uniessay writers if a four-engine jet accelerates down the runway at 2 m/s squared and on eof the jet engines fails, how much acceleration will the other three produce?

## 280 kg piano slides 4.1 m down a 30° incline and

280 kg piano slides 4.1 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (Fig. 6-36). The effective coefficient of kinetic friction is 0.40.

## In a game of American football, a quarterback takes the ball

In a game of American football, a quarterback takes the ball from the line of scrimmage, runs backward for 11.5 yards, and then runs sideways parallel to the line of scrimmage for 15.0 yards. At this point, he throws a forward pass 55.0 yards straight downfield perpendicular to the line of scrimmage. What is the magnitude of the football’s resultant displacement?

## A 4.6 kg mass is connected by a light cord to

A 4.6 kg mass is connected by a light cord to a 2.9 kg mass on a smooth surface as shown. The pulley rotates about a frictionless axle and has a moment of inertia of 0.23 kg · m2 and a radius of 0.52 m. b 4.6kg 2.9kg F1 F2 R What is the acceleration of the two masses? The acceleration of gravity is 9.81m/s2 . As- sume that the cord does not slip on the pulley. Answer in units of m/s2. 002 (part 2 of 3) 10.0 points What is the magnitude of the force F1? Answer in units of N. 003 (part 3 of 3) 10.0 points What is the magnitude of the force F2? Answer in units of N. 004 10.0

## How much time does it take a pulse of light to

How much time does it take a pulse of light to travel through 140 {rm m} of water?

## The 16 cm diameter disk in the figure below can rotate

The 16 cm diameter disk in the figure below can rotate on an axle through its center. What is the net torque about the axle if F = 24 N?

## a ladybug is sitting at the center of a turntable. The

a ladybug is sitting at the center of a turntable. The turntable is rotating on a frictionless bearings and it rotates without assistance from a motor. As the ladybug walks to the edge of the turntable, what happens to combined angular momentum of the ladybug and the turntable?

## A plane drops a rubber raft to people who are stranded

A plane drops a rubber raft to people who are stranded at sea. The plane is flying at an altitude of 1960 meters, at 90 meters per second. How far away from the people is the plane when the raft is dropped, if it makes it to them exactly.

## A 28.5 kg block is connected to an empty 1.00 kg

A 28.5 kg block is connected to an empty 1.00 kg bucket by a cord running over a frictionless pulley (Fig. 4-57). The coefficient of static friction between the table and the block is 0.450 and the coefficient of kinetic friction between the table and the block is 0.320. Sand is gradually added to the bucket until the system just begins to move. Calculate the mass of sand added to the bucket.

## A rotating uniform-density disk of radius 0.8 m is mounted in

A rotating uniform-density disk of radius 0.8 m is mounted in the vertical plane. The axle is held up by supports that are not shown, and the disk is free to rotate on the nearly frictionless axle. The disk has mass 3.6 kg. A lump of clay with mass 0.4 kg falls and sticks to the outer edge of the wheel at location A, m. Just before the impact the clay has a speed 9 m/s, and the disk is rotating clockwise with angular speed 0.71 radians/s.

## the gas fills the right portion of a horizontal cylinder whose

the gas fills the right portion of a horizontal cylinder whose radius is 5 cm. the initial pressure of the gas is 1.01*10^5 Pa. a frictionless movable piston separates the gas from the left portion of the cylinder, which is evacuated and contains an ideal spring. the piston is initially held in place by a pin. the spring is initially unstrained, and the lenght of the gas-filled portion is 20 cm. when the pin is removed and the gas is allowd to expand, the lenght of the gas-filled chamber doubles. the initial and final temperatures are equal. determine the spring constant

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