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What are the main intermolecular forces found in a liquid sample of #CBr_4#?

Question #a9e31

What are the advantages and disadvantages of mass spectroscopy?

How do you find the local max and min for #y=2x^3  5x^2  4x + 7#?

Question #fee78

Question #4acab

A wrench with a length of #24 cm# is being used to unscrew a #3 cm# bolt. If a torque of #7 Nm# is needed to overcome the friction keeping the bolt in place, what is the minimum torque that must be applied to the wrench to unscrew the bolt?

An object with a mass of #110 g# is dropped into #750 mL# of water at #0^@C#. If the object cools by #70 ^@C# and the water warms by #5 ^@C#, what is the specific heat of the material that the object is made of?

Does a car accelerate when it goes around a corner at a constant speed?

A ball with a mass of #256 g# is projected vertically by a spring loaded contraption. The spring in the contraption has a spring constant of #36 (kg)/s^2# and was compressed by #12/4 m# when the ball was released. How high will the ball go?

A ball with a mass of #7 kg # and velocity of #4 m/s# collides with a second ball with a mass of #2 kg# and velocity of # 6 m/s#. If #15%# of the kinetic energy is lost, what are the final velocities of the balls?

A #3.0*10^3# kg truck traveling at 20.0 m/s in a test laboratory collides into a wall and comes to rest in 0.10 s. What is the magnitude of the average force acting on the truck during the collision?

How do you solve #8h ^ { 2}  8h + 1= 0#?

How much work would it take to push a # 1 kg # weight up a # 4 m # plane that is at an incline of # pi / 4 #?

A ball with a mass of #420 g# is projected vertically by a spring loaded contraption. The spring in the contraption has a spring constant of #28 (kg)/s^2# and was compressed by #9/6 m# when the ball was released. How high will the ball go?

A 1.0 kg object moving at 10 m/s 30° N of E collides centrally with a 2.0 kg object moving at 5 m/s 30° S of W. If the collision is inelastic, what is the velocity of the combined objects after collision?

An object with a mass of # 15 kg# is on a ramp at an incline of #pi/8 #. If the object is being pushed up the ramp with a force of # 7 N#, what is the minimum coefficient of static friction needed for the object to remain put?

Question #3df20

If I throw an 18g dart from a height of 70" to a target that is 77" away & 68" high, and it takes .24 seconds to get there. Approx how heavy a dart of similar design would be required to hit the target if it's 3" further away using the same arm tempo?

A rock is dropped from rest from the roof of a building 100 m high. What is the velocity of the rock at the moment it reaches the ground? How long does it take to hit the ground?

A ball with a mass of #2 kg # and velocity of #2 m/s# collides with a second ball with a mass of #1 kg# and velocity of # 4 m/s#. If #20%# of the kinetic energy is lost, what are the final velocities of the balls?

How much work does it take to raise a #6 kg # weight #21 m #?

Question #4b2cc

An object, previously at rest, slides #7 m# down a ramp, with an incline of #(pi)/3 #, and then slides horizontally on the floor for another #3 m#. If the ramp and floor are made of the same material, what is the material's kinetic friction coefficient?

An object with a mass of #5 kg# is revolving around a point at a distance of #2 m#. If the object is making revolutions at a frequency of #4 Hz#, what is the centripetal force acting on the object?

How do you evaluate #intsin(2x)/sin(x)dx#?

An object, previously at rest, slides #15 m# down a ramp, with an incline of #pi/3 #, and then slides horizontally on the floor for another #10 m#. If the ramp and floor are made of the same material, what is the material's kinetic friction coefficient?

A wrench with a length of #20 cm# is used to unscrew a #3/2 cm# bolt. If a torque of #8 Nm# is needed to overcome the friction keeping the bolt in place, what is the minimum torque that must be applied to the wrench to unscrew the bolt?

How do you tune a cello?

Question #bb8aa

An object with a mass of #8 kg# is pushed along a linear path with a kinetic friction coefficient of #u_k(x)= 5x^2x+1 #. How much work would it take to move the object over #x in [2, 3], where x is in meters?

The rate of rotation of a solid disk with a radius of #8 m# and mass of #2 kg# constantly changes from #2 Hz# to #8 Hz#. If the change in rotational frequency occurs over #12 s#, what torque was applied to the disk?

An object with a mass of #4 kg# is pushed along a linear path with a kinetic friction coefficient of #u_k(x)= 5+tanx #. How much work would it take to move the object over #x in [(pi)/12, (pi)/4]#, where x is in meters?

How does the smoothness of a surface affect the size of friction?

What is the average speed of an object that is moving at #18 m/s# at #t=0# and accelerates at a rate of #a(t) =t8# on #t in [1,4]#?

What is the angular velocity in radians per second of a flywheel that spins 4820 revolutions per minute?

Question #2e2cc

How does an NMR spectrometer work?

A force field is described by #<F_x,F_y,F_z> = < x +y , 2zy, 2y z > #. Is this force field conservative?

A container with a volume of #4 L# contains a gas with a temperature of #270^o K#. If the temperature of the gas changes to #420^o K# without any change in pressure, what must the container's new volume be?

Question #b567b

An object with a mass of #5 kg# is on a plane with an incline of #pi/8 #. If the object is being pushed up the plane with # 8 N # of force, what is the net force on the object?

Two charges of # 6 C # and # 3 C# are positioned on a line at points # 5 # and # 8 #, respectively. What is the net force on a charge of # 4 C# at # 2 #?

An object of mass 16 kg is held in place by an applied force F and a pulley system as shown in the figure. Find the tension T4. Hint draw a free body diagram for the top pulley and the bottom pulley?

How do you find the derivative of #root3((6x+7))#?

A hat weighing #5"N"# is placed on a hook #1.5"m"# above the ground. What is the potential energy of the hat?

What is the minimum speed needed for a 2 kg mass to stay in motion in a vertical circle of radius 1.45 m?

A hockey player of mass 50kg runs at 20 m/s toward another player of 40kg, moving at 10 m/s. They collide. What are the final velocities of the players?

How do you integrate #int (x^2  8x + 44) / ((x + 2) (x  2)^2)# using partial fractions?

A solid disk, spinning counterclockwise, has a mass of #6 kg# and a radius of #3 m#. If a point on the edge of the disk is moving at #5/2 m/s# in the direction perpendicular to the disk's radius, what is the disk's angular momentum and velocity?

How do you tell #"S"_"N"1# and #"S"_"N"2# reactions apart?

How do you name alkenes and alkynes?

A force field is described by #<F_x,F_y,F_z> = < x , z, y > #. Is this force field conservative?

A ball with a mass of #7 kg # and velocity of #2 m/s# collides with a second ball with a mass of #6 kg# and velocity of # 3 m/s#. If #75%# of the kinetic energy is lost, what are the final velocities of the balls?

Two charges of # 3 C # and # 7 C# are positioned on a line at points # 6 # and # 5 #, respectively. What is the net force on a charge of # 2 C# at # 2 #?

Two charges of # 9 C # and # 2 C# are positioned on a line at points # 4 # and # 4 #, respectively. What is the net force on a charge of # 3 C# at # 2 #?

A wrench with a length of #42 cm# is being used to unscrew a #7/2 cm# bolt. If a torque of #32 Nm# is needed to overcome the friction keeping the bolt in place, what is the minimum torque that must be applied to the wrench to unscrew the bolt?

A box with an initial speed of #5 m/s# is moving up a ramp. The ramp has a kinetic friction coefficient of #5/4 # and an incline of #(3 pi )/4 #. How far along the ramp will the box go?

A force field is described by #<F_x,F_y,F_z> = < xy , xyx, 2y zx > #. Is this force field conservative?

An object with a mass of #5 kg# is pushed along a linear path with a kinetic friction coefficient of #u_k(x)= x+xsinx #. How much work would it take to move the object over #x in [0, 8pi]#, where x is in meters?

An object with a mass of #18 kg# is on a plane with an incline of # (5 pi)/12 #. If it takes #9 N# to start pushing the object down the plane and #4 N# to keep pushing it, what are the coefficients of static and kinetic friction?

An object, previously at rest, slides #4 m# down a ramp, with an incline of #pi/3 #, and then slides horizontally on the floor for another #9 m#. If the ramp and floor are made of the same material, what is the material's kinetic friction coefficient?

A wrench with a length of #20 cm# is used to unscrew a #5/2 cm# bolt. If a torque of #12 Nm# is needed to overcome the friction keeping the bolt in place, what is the minimum torque that must be applied to the wrench to unscrew the bolt?

Question #6e7c7

A block weighing #14 kg# is on a plane with an incline of #pi/12# and friction coefficient of #1/5#. How much force, if any, is necessary to keep the block from sliding down?

A projectile is shot at an angle of #pi/8 # and a velocity of # 10 m/s#. How far away will the projectile land?

A 0.1 g spider is suspended from a thread. What is the tension in the thread?

An object with a mass of # 3 kg# is traveling in a circular path of a radius of #2 m#. If the object's angular velocity changes from # 2 Hz# to # 16 Hz# in # 5 s#, what torque was applied to the object?

A lamp hangs from the ceiling at a height of 2.9 m. If the lamp breaks and falls to the floor, what is its impact speed?

Question #8685a

What torque would have to be applied to a rod with a length of #4 m# and a mass of #3 kg# to change its horizontal spin by a frequency of #5 Hz# over #1 s#?

A ball with a mass of #150 g# is projected vertically by a spring loaded contraption. The spring in the contraption has a spring constant of #24 (kg)/s^2# and was compressed by #4/3 m# when the ball was released. How high will the ball go?

How many mols are in 8.00 g #BeF_2#?

How much work does it take to push an object with a mass of #4 kg # up a #9 m # ramp, if the ramp has an incline of #(5pi)/12 # and a kinetic friction coefficient of # 8 #?

A projectile is shot at an angle of #pi/3 # and a velocity of # 6 m/s#. How far away will the projectile land?

An object with a mass of #8 kg# is on a plane with an incline of #  pi/12 #. If it takes #8 N# to start pushing the object down the plane and #2 N# to keep pushing it, what are the coefficients of static and kinetic friction?

A ball with a mass of #12 kg# moving at #8 m/s# hits a still ball with a mass of #15 kg#. If the first ball stops moving, how fast is the second ball moving? How much kinetic energy was lost as heat in the collision?

An object, previously at rest, slides #9 m# down a ramp, with an incline of #(pi)/3 #, and then slides horizontally on the floor for another #19 m#. If the ramp and floor are made of the same material, what is the material's kinetic friction coefficient?

What is the angle between #<1,8,6 ># and #< 6,3,0>#?

How do you integrate #int x^2e^x# from 0 to 1 by integration by parts method?

What is the cross product of #( 4 i  5 j + 2)# and #(i + j 7k)#?

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