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Natasha

Questions (256)

1/3log(base7) x=2log(base7)4Solve for x?
1. 0 answers
2. 384 views
In many countries, automatic number plate recognition is used to catch speeders. The system takes a time-stamped license plate
1. 0 answers
2. 567 views
500ml of 0.250M Na2SO4 solution is added to an aqueous solution of 15.00 g of BaCl2 resulting in the formation of white
1. 1 answer
2. 1,795 views
Two resistors, 68.0 Ω and 74.0 Ω, are connected in parallel. The current through the second resistor is 4.60 A.(a) Determine
1. 1 answer
2. 523 views
A moving particle encounters an external electric field that decreases its kinetic energy from 9100 eV to 6630 eV as the
1. 2 answers
2. 1,413 views
The drawing shows a square, each side of which has a length of L = 0.25 m. Two different positive charges q1 and q2 are fixed at
1. 4 answers
2. 2,574 views
A moving particle encounters an external electric field that decreases its kinetic energy from 9100 eV to 6630 eV as the
1. 0 answers
2. 489 views
Two charges, -17 and +3.6 µC, are fixed in place and separated by 3.2 m.a) At what spot along a line through the charges is the
1. 1 answer
2. 3,056 views
An electric field of 264,000 N/C points due west at a certain spot. What are the magnitude and direction of the force that acts
1. 1 answer
2. 1,003 views
Two charges, -17 and +3.6 µC, are fixed in place and separated by 3.2 m.(a) At what spot along a line through the charges is
1. 0 answers
2. 850 views
An electric field of 264,000 N/C points due west at a certain spot. What are the magnitude and direction of the force that acts
1. 1 answer
2. 870 views
The shock absorbers in the suspension system of a car are in such bad shape that they have no effect on the behavior of the
1. 0 answers
2. 486 views
The shock absorbers in the suspension system of a car are in such bad shape that they have no effect on the behavior of the
1. 0 answers
2. 502 views
Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.7 kg · m2 and an angular velocity of +7.3
1. 1 answer
2. 884 views
A 9.67-m ladder with a mass of 25.0 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight
1. 1 answer
2. 1,230 views
Jahna and Raul move onto the setup for experiment 2. They have been asked to determine both the mass of the rod and the mass of
1. 1 answer
2. 624 views
Two students, Jahna, and Raul, re performing Experiment 1. To simplify their calculations, each will apply their force
1. 2 answers
2. 646 views
A grindstone of radius 4.0m is initially spinning with an angular speed of 8.0 rad/s. The angular speed is then increased to 12
1. 1 answer
2. 1,896 views
The earth has a radius of 6.38 106 m and turns on its axis once every 23.9 h.A. What is the tangential speed (in m/s) of a
1. 2 answers
2. 1,202 views
Some bacteria are propelled by biological motors that spin hair-like flagella. A typical bacterial motor turning at a constant
1. 1 answer
2. 782 views
A wind turbine is initially spinning at a constant angular speed. As the wind's strength gradually increases, the turbine
1. 1 answer
2. 800 views
The (nonconservative) force propelling a 1.50 103-kg car up a mountain road does 5.10 106 J of work on the car. The car starts
1. 1 answer
2. 1,619 views
A pitcher throws a 0.140-kg baseball, and it approaches the bat at a speed of 45.0 m/s. The bat does Wnc = 65.0 J of work on the
1. 1 answer
2. 1,092 views
Two stars in a binary system orbit around their center of mass. The centers of the two stars are 7.40 1011 m apart. The larger
1. 0 answers
2. 532 views
Two ice skaters have masses m1 and m2 and are initially stationary. Their skates are identical. They push against one another,
1. 1 answer
2. 1,335 views
By accident, a large plate is dropped and breaks into three pieces. The pieces fly apart parallel to the floor, with v1 = 3.15
1. 0 answers
2. 1,179 views
A 1100-kg car is being driven up a 4.0° hill. The frictional force is directed opposite to the motion of the car and has a
1. 0 answers
2. 609 views
A 1100-kg car is being driven up a 4.0° hill. The frictional force is directed opposite to the motion of the car and has a
1. 0 answers
2. 643 views
A car accelerates uniformly from rest to 21.0 m/s in 6.1 s along a level stretch of road. Ignoring friction, determine the
1. 0 answers
2. 659 views
A baseball (m = 151 g) approaches a bat horizontally at a speed of 39.8 m/s (89 mi/h) and is hit straight back at a speed of
1. 3 answers
2. 2,159 views
A car accelerates uniformly from rest to 21.0 m/s in 6.1 s along a level stretch of road. Ignoring friction, determine the
1. 1 answer
2. 2,596 views
A 1100-kg car is being driven up a 4.0° hill. The frictional force is directed opposite to the motion of the car and has a
1. 0 answers
2. 1,224 views
A car (mass=1100kg) is traveling at 32m/s when it collides head on with a sport utility vehicle (mass=2500kg) traveling in the
1. 1 answer
2. 738 views
A car (mass=1100kg) is traveling at 32m/s when it collides head on with a sport utility vehicle (mass=2500kg) traveling in the
1. 1 answer
2. 3,648 views
A two staged rocket moves in space at a constant velocity of 4900m/s. The two stages are then separated by a small explosive
1. 1 answer
2. 1,832 views
In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a
1. 3 answers
2. 6,443 views
Am 85kg jogger is heading due east at a speed of 2.0m/s. A 55kg jogger is heading 32 degrees north of east at a speed of 3.0m/s.
1. 1 answer
2. 1,180 views
A space probe is traveling in outer space with a momentum that has a magnitude of 7.5e7 Kg*m/s. A retrorocket is fired to slow
1. 0 answers
2. 718 views
A space probe is traveling in outer space with a momentum that has a magnitude of 7.5e7 Kg*m/s. A retrorocket is fired to slow
1. 0 answers
2. 764 views
An electron is a subatomic particle (m = 9.11 x 10-31 kg) that is subject to electric forces. An electron moving in the +x
1. 0 answers
2. 500 views
A 190-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 32.0°
1. 0 answers
2. 608 views
During a storm, a tree limb breaks off and comes to rest across a barbed wire fence at a point that is not in the middle between
1. 1 answer
2. 650 views
Traveling at a speed of 18.5 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The
1. 2 answers
2. 1,293 views
An electron is a subatomic particle (m = 9.11 x10-31 kg) that is subject to electric forces. An electron moving in the +x
1. 1 answer
2. 550 views
find to the nearest minute, all positive values in the interval 0° ≤ θ < 180° that satisfy the equation 2 tan^2 θ - tan θ
1. 1 answer
2. 442 views
find to the nearest minute, all positive values in the interval 0° ≤ θ < 180° that satisfy the equation 2 tan^2 θ - tan θ
1. 1 answer
2. 1,153 views
A small rocket is fired directly upwards with an initial velocity of 100m/s, How many seconds will it taketo reach its maximum
1. 2 answers
2. 796 views
Under what conditions would an applied force increase the Kinetic energy of an object?
1. 0 answers
2. 341 views
A 1.00e2kg crate is being pushed across a horizontal floor by a force of P that makes an angle of 30.0 degrees below the
1. 0 answers
2. 785 views
A steroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. The asteroid
1. 0 answers
2. 677 views
A husband and Wife take turns pulling their child in a wagon along a horizontal sidewalk. Each exerts a constant force and pulls
1. 1 answer
2. 1,463 views
A secretary can type 12 names per 60 secods in an average classroom how long will it take her to type all the names
1. 1 answer
2. 458 views
In an automatic clothes dryer, a hollow cylinder moves the clothes on a vertical circle (radius r = 0.31 m), as the drawing
1. 0 answers
2. 1,427 views
A satellite moves on a circular earth orbit that has a radius of 6.4 106 m. A model airplane is flying on a 23-m guideline in a
1. 0 answers
2. 527 views
A racetrack has the shape of an inverted cone, as the drawing shows. On this surface the cars race in circles that are parallel
1. 0 answers
2. 662 views
A "swing" ride at a carnival consists of chairs that are swung in a circle by 12.0 m cables attached to a vertical rotating
1. 1 answer
2. 5,118 views
A centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is
1. 0 answers
2. 593 views
In the figure below, an object, after being released from its circular path, travels the distance OA in the same time it would
1. 0 answers
2. 680 views
A 260-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0°
1. 0 answers
2. 497 views
A 260-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0°
1. 0 answers
2. 466 views
The drawing shows box 1 resting on a table, with box 2 resting on top of box 1. A massless rope passes over a massless,
1. 1 answer
2. 2,256 views
The drawing shows a wire tooth brace used by orthodontists. The topmost tooth is protruding slightly, and the tension in the
1. 1 answer
2. 1,009 views
The large blade of a helicopter is rotating in a horizontal circle. The length of the blade is 6.7m, measured from its tip to
1. 2 answers
2. 2,041 views
A net force of 25N is applied for 5.7s to a 12-kg box initially at rest. Waht is the speed of the box at the end of the 5.7s
1. 4 answers
2. 9,014 views
A 20kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 80N and is
1. 2 answers
2. 4,305 views
At an instant when a soccer ball is in contact with the foot of a player kicking it, the horizontal or x component of the ball's
1. 3 answers
2. 10,094 views
When a 58g tennis ball is served, it accelerates from rest to a speed of 45m/s. The impact with the racket gives the ball a
1. 5 answers
2. 12,678 views
A 343-kg boat is sailing 16.2° north of east at a speed of 1.98 m/s. Thirty seconds later, it is sailing 37.5° north of east
1. 1 answer
2. 649 views
An electron is a subatomic particle (m = 9.11 10-31 kg) that is subject to electric forces. An electron moving in the +x
1. 1 answer
2. 667 views
As a moon follows its orbit around a planet, the maximum gravitational force exerted on the moon by the planet exceeds the
1. 2 answers
2. 693 views
As a moon follows its orbit around a planet, the maximum gravitational force exerted on the moon by the planet exceeds the
1. 0 answers
2. 782 views
A 343-kg boat is sailing 16.2° north of east at a speed of 1.98 m/s. Thirty seconds later, it is sailing 37.5° north of east
1. 0 answers
2. 673 views
The lob in tennis is an effective tactic when your opponent is near the net. It consists of lofting the ball over his head,
1. 1 answer
2. 662 views
An electron is a subatomic particle (m = 9.11 10-31 kg) that is subject to electric forces. An electron moving in the +x
1. 0 answers
2. 556 views
An airplane with a speed of 76.8 m/s is climbing upward at an angle of 48° with respect to the horizontal. When the plane's
1. 1 answer
2. 555 views
The lob in tennis is an effective tactic when your opponent is near the net. It consists of lofting the ball over his head,
1. 1 answer
2. 1,477 views
What are the acids in the house?
1. 1 answer
2. 300 views
Derive an expression for the vertical position of a projectile in terms of its horizontal position. This sometimes called
1. 1 answer
2. 547 views
An 18-year-old runner can complete a 10.0-km course with an average speed of 4.39 m/s. A 50-year-old runner can cover the same
1. 1 answer
2. 746 views
Can you think of any ways to measure instantaneous speed directly?
1. 0 answers
2. 599 views
What equation gives the velocity as a function of time for an object with constant acceleration?
1. 1 answer
2. 399 views
What equation gives the position as a function of time for an object with constant acceleration?
1. 1 answer
2. 2,754 views
A dynamite blast at a quarry launches a chunk of rock straight upward, and 2.0s later it is rising at a speed of 15m/s. Assuming
1. 1 answer
2. 5,569 views
In a historical movie, two knights on horseback start from rest 88.0m apart and ride directly toward each other to do battle.
1. 1 answer
2. 1,145 views
(a) Just for fun, a person jumps from rest from the top of a cliff overlooking a lake. In falling through a distance H, she
1. 3 answers
2. 3,080 views
Two cars cover the same distance in a straight line. Car A covers the distance at a constant velocity. Car B starts from rest
1. 2 answers
2. 5,909 views
The magnitudes of the four displacement vectors shown in the drawing are A = 13.0 m, B = 11.0 m, C = 12.0 m, and D = 27.0 m.
1. 1 answer
2. 970 views
A jetliner, traveling northward, is landing with a speed of 67 m/s. Once the jet touches down, it has 765 m of runway in which
1. 1 answer
2. 771 views
An 18-year-old runner can complete a 10.0 km course with an average speed of 4.58 m/s. A 50-year-old runner can cover the same
1. 2 answers
2. 1,611 views
using math expressions, define the following: Ka,pKa, pKb, Kb and pKw
1. 1 answer
2. 606 views
Suppose we want to design a new placebo-controlled trial to evaluate an experimental medication to increase lung capacity. The
1. 0 answers
2. 828 views
How did african slavery contributed to the economic growth of the british economy
1. 1 answer
2. 520 views
When you write a definition of something, I was taught in school that you should not use the word you are defining in the
1. 1 answer
2. 856 views
a. Calculate the delta H, delta G, and equilibrium constant for the reaction of methane with Cl2 to give CH3Cl and HCl. Use the
1. 0 answers
2. 781 views
trains A and B are traveling in the same direction on paraleel tracks. Train A is traveling at 80 miles per hour and train B is
1. 1 answer
2. 1,050 views
How is pushing down the accelerator pedal resulting in a faster consumption of fuel in the engine concentration?
1. 0 answers
2. 976 views
How is pushing down the accelerator pedal resulting in a faster consumption of fuel in the engine concentration?
1. 0 answers
2. 404 views
The accelerator pedal in the car is pressed, resulting in a faster consumption of fuel in the engine.Now according to previous
1. 0 answers
2. 500 views
Paloma did not make it to work for her car, broke down on the freeway. Is this better?The hardware store down the street, which
1. 1 answer
2. 1,082 views
Is this correct?Even though it is almost summer, we still have overcast skies and light rain. The neighbors’ new dog is,
1. 6 answers
2. 645 views

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