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July 23, 2014

Homework Help: Science: Physics

Recent Homework Questions About Physics

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physics
A bat moving with a speed of 3.55 m/s and emitting sound of 34.0 kHz approaches a moth at rest on a tree trunk. What frequency is heard by the moth? Calculate the frequency heard by the moth when the speed of the bat is 5.55 m/s.
Tuesday, March 11, 2014 at 2:45am

physics
A stationary horn emits a 151 Hz tone. What frequency is heard by a passenger on a train which is moving towards this horn with a speed of 28.7 m/s?
Tuesday, March 11, 2014 at 2:42am

College Physics
PLEASE HELP. DUE TOMORROW A large box 4.5 m on a side has mass 90 kg. A force F is applied as shown, making an angle θ = 35 with respect to the vertical. How large must the force be to tip the box about the pivot point P? The force is being pulled downward with a 35 ...
Monday, March 10, 2014 at 10:48pm

Physics
A car of mass m moving at a speed v1 collides and couples with the back of a truck of mass 3m moving initially in the same direction as the car at a lower speed v2. (Use any variable or symbol stated above as necessary.) (b) What is the change in kinetic energy of the car&#...
Monday, March 10, 2014 at 9:26pm

Physics
How many watts of power do you expend when you exert a force of 0.50N that moves a book 2.1m in a time interval of 1.1s ? Express your answer to two significant figures and include the appropriate units.
Monday, March 10, 2014 at 7:32pm

Physics
What is his kinetic energy when his potential energy reduces to 1000 J? Express your answer to two significant figures and include the appropriate units
Monday, March 10, 2014 at 7:31pm

Physics
What change in kinetic energy does an airplane experience on takeoff if it is moved a distance of 480m by a sustained net force of 5400N ? Express your answer to two significant figures and include the appropriate units.
Monday, March 10, 2014 at 7:31pm

Physics!
How many joules of potential energy does a 1.2-kg book gain when it is elevated 4.0 ? Express your answer to two significant figures and include the appropriate units.
Monday, March 10, 2014 at 7:30pm

Physics
What is the momentum of a 52 kg carton that slides at 5.0m/s across an icy surface?
Monday, March 10, 2014 at 7:21pm

Physics
PLEASE HELP. a 1000 kg car is coasting down the highway at 20 m/s. How much work do friction and air resistance do in bringing the car to rest?
Monday, March 10, 2014 at 7:15pm

Physics!
Calculate the watts of power expended when a force of 2.0N moves a book 2.4m in a time interval of 1.0 s. Express your answer to two significant figures and include the appropriate units.
Monday, March 10, 2014 at 7:09pm

Physics
the work done in lifting a 600-N barbell 1.6m above the floor. What is the gain of potential energy of the barbell when it is lifted to this height? Express your answer to two significant figures and include the appropriate units.
Monday, March 10, 2014 at 7:09pm

Physics
Calculate the work done in lifting a 600-N barbell 1.6m above the floor. Express your answer to two significant figures and include the appropriate units.
Monday, March 10, 2014 at 7:08pm

physics
A shopper pushes a grocery cart 20.0 m at constant speed on level ground, against a 35.0 N frictional force. He pushes in a direction 25.0º below the horizontal. (a) What is the work done on the cart by friction? (b) What is the work done on the cart by the gravitational ...
Monday, March 10, 2014 at 6:41pm

physics
calculate the work done on a 1550kg elevator car by its cable to lift it 40 m at constant speed assuming friction average 125 n
Monday, March 10, 2014 at 6:17pm

physics
A spring can store 25 J of energy when compressed by 0.13 m. What is the spring constant of the spring? Use SI units in your answer. k =
Monday, March 10, 2014 at 5:15pm

Physics
a BATH CONTAINS 100 KG OF WATER AT 60 DEGREES CELCIUS. HOT AND COLD TAPS ARE THEN TURNED ON TO DELIVER 20KG PER MINUTE EACH A TEMPERATURE 70 DEGREES CELSIUS AND 10 DEGREES CELSIUS RESPECTIVELY. HOW LONG WILL IT BE BEFORE THE TEMPERATURE IN THE BATH HAS DROPPED TO 45 DEGREES ...
Monday, March 10, 2014 at 5:15pm

Physics
A rocket is fired in deep space, where gravity and drag forces are 0. If The rocket has in initial mass of 6000kg and eject gas at a relative speed of 2000m/s, how much gas must it eject in the first second (1s) to have an inital acceleration of 25m/s?
Monday, March 10, 2014 at 4:50pm

Physics
The electric field on the axis of a uniformly charged ring has magnitude 370kN/C at a point 6.2cm from the ring center. The magnitude 17cm from the center is 150kN/C ; in both cases the field points away from the ring.Find the ring's radius.
Monday, March 10, 2014 at 4:44pm

Physics
A truck and a bicycle are moving side by side with the same velocity. Which, if either, will require the larger impulse to bring it to a stop? a) The bicycle. b) The truck. c) Both will need the same impulse. d) There is not enough information to determine the answer.
Monday, March 10, 2014 at 3:56pm

Physics
The frequency of oscillation of a pendulum is 7 Hz. What is the period of oscillation?
Monday, March 10, 2014 at 3:53pm

Physics
A ball traveling with an initial momentum of 2.5 kg*m/s bounces off a wall and comes back in the opposite direction with a momentum of -2.5 kg*m/s. What impulse would be required to produce this change?
Monday, March 10, 2014 at 3:42pm

physics
a water balloon launcher with a mass of 4 kg fires a .5 balloon with a velocity of 3m/s to the east. what is the recoil velocity of the launcher?
Monday, March 10, 2014 at 3:07pm

physics
Multiple Concept Example 9 provides background pertinent to this problem. The magnitudes of the four displacement vectors shown in the drawing are A = 15.0 m, B = 10.0 m, C = 12.0 m, and D = 29.0 m. Determine the (a) magnitude and (b) direction for the resultant that occurs ...
Monday, March 10, 2014 at 2:19pm

Physics
A spring with a cart at its end vibrates at frequency 8.5Hz. 1.Determine the period of vibration 2.Determine the frequency if the cart's mass is doubled while the spring constant remains unchanged. 3.Determine the frequency if the spring constant doubles while the cart'...
Monday, March 10, 2014 at 1:12pm

Physics
You exert a 100-N pull on the end of a spring. When you increase the force by 20% to 120 N, the spring's length increases 4.0cm beyond its original stretched position. What is the spring constant of the spring?
Monday, March 10, 2014 at 1:10pm

Physics
Does the solar powered calculator work when there is no bright light falling on the solar panel? Explain. I think it does but I don't know why please help explain this. Thank you
Monday, March 10, 2014 at 12:23pm

physics
Use the following information to calculate the speed of a ball in a pinball machine at a specific location. The ball is launched by using a spring (k = 684 N/m) compressed by 7.8 cm. Consider the starting position of the ball to be its location when the spring is compressed. ...
Monday, March 10, 2014 at 11:59am

Physics
what type of heat transfer does solar hot water heating use? (conduction, convection, radiation)
Monday, March 10, 2014 at 11:54am

Physics
In a series circuit, the power source is 9-volt battery and three resistors. R1=7ohm R2=9ohm R3=2ohm What is the total resistance in this series circuit? What is the current? Please help I don't understand this!, Thank you
Monday, March 10, 2014 at 11:38am

physics
A bead of mass m = 42.5 kg is released from point A which is located 5 m above the ground and slides on the frictionless track as shown in the figure. Determine the beads speed when it reaches point C which is located 2.0 m above the ground.
Monday, March 10, 2014 at 11:18am

Physics
A rope is used to pull a 5.19 kg block at constant speed 3.38 m along a horizontal floor. The force on the block from the rope is 3.23 N and directed 20.0° above the horizontal. What are (a) the work done by the rope's force, (b) the increase in thermal energy of the ...
Monday, March 10, 2014 at 10:48am

Physics
A 540 g block is released from rest at height h0 above a vertical spring with spring constant k = 320 N/m and negligible mass. The block sticks to the spring and momentarily stops after compressing the spring 19.8 cm. How much work is done (a) by the block on the spring and (b...
Monday, March 10, 2014 at 10:48am

Physics
A table can be modeled as a flat block supported by four identical legs. If the mass of the top block is 10 kg and each leg is a uniform rod with height of 1m and mass of 5 kg. Find the gravitational potential energy of the table. Take the ground as the reference level of ...
Monday, March 10, 2014 at 9:19am

Physics
Show that when the total external force acting on N particles is zero, the total external torque is independent of the choice of reference point O.
Monday, March 10, 2014 at 9:17am

Please Help with Physics Problems???????
A 0.60 kg ladle sliding on a horizontal frictionless surface is attached to one end of a horizontal spring (k = 430 N/m) whose other end is fixed. The ladle has a kinetic energy of 8.6 J as it passes through its equilibrium position (the point at which the spring force is zero...
Monday, March 10, 2014 at 5:53am

Physics please help?????
(a) At a certain instant, a particle-like object is acted on by a force F=(2.9N)i-(1.7N)j+(5.7N)k while the object's velocity is v= -(3.2m/s)i+(4.5m/s)k. What is the instantaneous rate at which the force does work on the object? (b) At some other time, the velocity ...
Monday, March 10, 2014 at 5:51am

physics
A ball is projected upwards from a platform 8m above the ground,with an initial velocity of 3m/s.How long does it take for the ball to reach the ground.
Monday, March 10, 2014 at 5:39am

Physics
What is the work done by a crane that lifts a 1,200kg object 30m?
Monday, March 10, 2014 at 3:29am

Physics
The rockets on a cell phone satellite provide a thrust of 12,000N. If the mass of the satellite is 15,000kg, What will be the resulting acceleration?
Monday, March 10, 2014 at 3:17am

Physics
If you throw a 0.5 kg ball straight up with a speed of 10 m/s, how high will it go?
Monday, March 10, 2014 at 3:05am

physics
A piece of metal has a mass of 85cg and a volume of 450L. What is its density in g/cm3? What would be the mass of 300 cm3 of this metal? What would be the volume of 00 ounces of this metal?
Monday, March 10, 2014 at 12:30am

PHYSICS IMPULSE MOMENTUM QUESTION
what is a scenario in which REDUCING the time of impact would be beneficial?
Monday, March 10, 2014 at 12:29am

physics
skateboards on a hill time speed kinetic energy and work starting from rest angel and Brittany skateboard down a hill as shown. angel rides down the steep side while britney rides down the shallow side. Angel has more mass than Britney. assume that friction and air Resistance ...
Sunday, March 9, 2014 at 11:31pm

physics
astronomical observations of our milky way galaxy indicate that it has a mass about 8.0 *10^13 times the mass of our sun. a star orbiting on the galaxy edge is about 6.0*10^4 light years a way from the galactic center what is the orbital period of that star in earth year
Sunday, March 9, 2014 at 10:41pm

Physics
The southwest corner of a football field is selected as the origin of a rectangular coordinate system. A football is placed on the field at (x, y) = (37.7 m, 62.2 m). How long would it take a student, walking at a speed of 1.93 m/s, directly from the corner towards the ...
Sunday, March 9, 2014 at 10:27pm

Physics
A 2 kg block has an initial velocity of 16 m/s at the bottom of the ramp (see diagram below). The coefficient of kinetic friction between the block and the ramp is 0.1. The spring has length 3 m and has a spring constant of 100 N/m. What maximum compression will the spring ...
Sunday, March 9, 2014 at 9:13pm

Physics
A 0.60 kg ladle sliding on a horizontal frictionless surface is attached to one end of a horizontal springPhy(k = 430 N/m) whose other end is fixed. The ladle has a kinetic energy of 8.6 J as it passes through its equilibrium position (the point at which the spring force is ...
Sunday, March 9, 2014 at 9:02pm

Physics
(a) At a certain instant, a particle-like object is acted on by a force F=(2.9N)i-(1.7N)j+(5.7N)k while the object's velocity is v= -(3.2m/s)i+(4.5m/s)k. What is the instantaneous rate at which the force does work on the object? (b) At some other time, the velocity ...
Sunday, March 9, 2014 at 9:00pm

Physics ib
What is the way to set up an electric circuit with a filament lamp, switch, battery, ohmmeter, voltmeter and variable resistor as to have the most optimal measurement for the current and voltage?
Sunday, March 9, 2014 at 8:58pm

Physics
Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 66.0∘. Dog A exerts a force of 278N , and dog B exerts a force of 324N . =Find the magnitude of the resultant force. =Find the angle the resultant force makes with the rope of dog A.
Sunday, March 9, 2014 at 8:34pm

physics
If a wire has a resistance of 132ohms a length of 110cm and an area of cross- sectional of 0.00415cm square find the resistivity of the material of which it is made
Sunday, March 9, 2014 at 4:33pm

Physics
The differential gear of a car axle allows the wheel on the left side of a car to rotate at a different angular speed than the wheel on the right side. A car is driving at a constant speed around a circular track on level ground, completing each lap in 20.2 s. The distance ...
Sunday, March 9, 2014 at 4:17pm

physics
A construction worker riding in the tray of a truck traveling at 10 m/s, sees one of his friends passing and decides to jump off the truck. The magnitude of his initial speed of jumping is: (a) zero (b) Less than the truck's (c) Equal to that of the truck (d) Greater than ...
Sunday, March 9, 2014 at 3:27pm

Physics
An airplane is 5,000 m above an observer and 2.1 km to the west of them and 1.5 km to the north of you. Determine the angle to the plane in the x – y axis and the total distance to the plane from you. Choose the x-axis east, y axis north, and z axis up.
Sunday, March 9, 2014 at 3:16pm

Physics-Kinetic Energy
Can someone help me solve this kinetic energy problem? A 2050 kg truck is traveling east through an intersection at 2.3 m/s when it is hit simultaneously from the side and the rear. (Some people have all the luck!) One car is a 1200 kg compact traveling north at 4.5 m/s. The ...
Sunday, March 9, 2014 at 2:48pm

physics
A 4.0-uF capacitor is charged to 600 volts. how much energy is stored in the electric field of the capacitor?
Sunday, March 9, 2014 at 1:16pm

Physics
A 2050 kg truck is traveling east through an intersection at 2.3 m/s when it is hit simultaneously from the side and the rear. (Some people have all the luck!) One car is a 1200 kg compact traveling north at 4.5 m/s. The other is a 1600 kg midsize traveling east at 10 m/s. The...
Sunday, March 9, 2014 at 12:01pm

Physics
A single force acts on a 1.1 kg particle-like object in such a way that the position of the object as a function of time is given by x = 4.1t - 3.6t2 + 4.5t3, with x in meters and t in seconds. Find the work done on the object by the force from t = 0 to t = 8.6 s.
Saturday, March 8, 2014 at 11:33pm

Physics
The force on a particle is directed along an x axis and given by F = 1.7(x/2.8 - 0.95) where x is in meters and F is in Newtons. Find the work done by the force in moving the particle from x = 0 to x = 6.9 m.
Saturday, March 8, 2014 at 11:32pm

physics-lenses
we are different
Saturday, March 8, 2014 at 10:01pm

physics-lenses
trace and describe the image formed by a convex lens (object between 2f and f)
Saturday, March 8, 2014 at 9:52pm

physics-lenses
a certain Galilean telescope has a magnification of 2 times. if the focal length of the objective lens is 60 cm, how long is the telescope? thanks :))
Saturday, March 8, 2014 at 9:11pm

physics
A converging lens is 50cm away from the object. if the distance of the image from the object is 120cm and greater than four times the focal length of the lens, what is the focal length of the said lens?
Saturday, March 8, 2014 at 9:09pm

physics
A 0.380 kg pendulum bob passes through the lowest part of its path at a speed of 2.03 m/s. What is the tension in the pendulum cable at this point if the pendulum is 83.1 cm long? When the pendulum reaches its highest point, what angle does the cable make with the vertical? ...
Saturday, March 8, 2014 at 8:16pm

physics
A 75.5 kg skier encounters a dip in the snow's surface that has a circular cross section with radius of curvature of $r$ = 10.1 m. If the skier's speed at point A in the figure below is 7.82 m/s, what is the normal force exerted by the snow on the skier at point B? h...
Saturday, March 8, 2014 at 8:14pm

Physics
A 2050 kg truck is traveling east through an intersection at 2.3 m/s when it is hit simultaneously from the side and the rear. (Some people have all the luck!) One car is a 1200 kg compact traveling north at 4.5 m/s. The other is a 1600 kg midsize traveling east at 10 m/s. The...
Saturday, March 8, 2014 at 6:59pm

Physics
a person's metabolic processes can usually operate at a power of 6 W/kg of body mass for several hours at a time. If a 60 kg woman carrying a 12 kg pack is walking uphill with an energy-conversion efficiency of 20 percent, at what rate, in meters/hour, does her altitude ...
Saturday, March 8, 2014 at 6:17pm

Physics
A 2050 kg truck is traveling east through an intersection at 2.3 m/s when it is hit simultaneously from the side and the rear. (Some people have all the luck!) One car is a 1200 kg compact traveling north at 4.5 m/s. The other is a 1600 kg midsize traveling east at 10 m/s. The...
Saturday, March 8, 2014 at 3:29pm

Physics
A 5.36 kg object falls freely (ignore air resistance), after being dropped from rest. Determine the initial kinetic energy, the final kinetic energy, and the change in kinetic energy for the following. (a) first meter of fall initial kinetic energy 0 J final kinetic energy ___...
Saturday, March 8, 2014 at 3:16pm

Physics
A car of mass m moving at a speed v1 collides and couples with the back of a truck of mass 3m moving initially in the same direction as the car at a lower speed v2. (Use any variable or symbol stated above as necessary.) (b) What is the change in kinetic energy of the car&#...
Saturday, March 8, 2014 at 3:15pm

physics
A stationary rocket is launched vertically upward. After 4s, the rocket's fuel is used up and it is 225.6 m above the ground. At this instant the velocity of the rocket is 112,8 m/s. Then the rocket undergoes free fall. Ignore the effect of the air friction.Assume that g ...
Saturday, March 8, 2014 at 3:08pm

Physics
A penny rests on top of a bowling ball. You give the bowling ball a slight bump and the penny slides off the frictionless, spherical surface as shown below. At what angle θ does the penny leave the surface of the bowling ball? (Hint: When the penny leaves the surface, the...
Saturday, March 8, 2014 at 2:35pm

Physics
A stone is dropped from the top of a 83.0 m tall building. How far above the ground is the stone 1.60 seconds before it reaches the ground?
Saturday, March 8, 2014 at 1:06pm

physics
You reach out a second-story window that is 17 m above the sidewalk and throw a 2-kg ball straing upward with 17 J of kinetic energy. Use g = 10m/s^2 Part A) What is the ball's gravitational potential energy when it is released? Use a height measured from the sidewalk. ...
Saturday, March 8, 2014 at 11:50am

Physics
Block A in the figure weighs 48.0N . The coefficient of static friction between the block and the surface on which it rests is 0.250. The weight w is 6.00N and the system remains at rest. -Find the friction force exerted on block A. -Find the maximum weight w for which the ...
Saturday, March 8, 2014 at 11:10am

Physics
A bronze cannon ball with a mass of 4.5 kg is fired vertically from a small cannon and reaches a height of 10.0 m. If the canon is now aimed at an angle 33 degrees above the horizontal, calculate the horizontal distance the cannon ball would travel before it reaches the ground.
Saturday, March 8, 2014 at 10:28am

PHYSICS
the sum of the magnitude of two forces acting at a point is 18 and the magnitude of their resultant is 12.if the resultant is at 90 degree with the force of the smaller magnitude, then their magnitudes are:
Saturday, March 8, 2014 at 10:16am

Physics
Three forces, F1 = 9.2 N, F2 = 7.8 N and F3 = 8.3 N are acting on a small box of mass 47.0 kg. If the box is moving in the direction of F2 at constant speed, what is the magnitude of the combination of F2 and F3
Saturday, March 8, 2014 at 10:00am

Physics-motion
A car accelerates uniformly from rest at a. After a certain time, its acceleration becomes -a. It continues to travel and stops finally. If the total displacement of the car is L, what is the total time of travel? The answer is (4L/a)^(1/2). But why??
Saturday, March 8, 2014 at 5:28am

physics
A jet plane takes about 56 s to go from rest to the takeoff speed of 120 mph (miles per hour). What is the average horizontal force that the seat exerts on the back of a 60-kg passenger during takeoff? First make sure that each of the values are in SI units. Use 1 mile = 1609...
Saturday, March 8, 2014 at 12:39am

physics
A small block of mass 42 kg slides along a frictionless loop-the-loop track. The radius of the loop is 5 meters. At what height above the bottom of the track should the block be released from so that it just makes it through the loop-the-loop without losing contact with the ...
Friday, March 7, 2014 at 11:45pm

PHYSICS
A frictionless horizontal air track has a spring at either end. The spring on the left has a spring constant of 1600 N/m; the one on the right has a spring constant of 1060 N/m. A glider with a mass of 2.9 kg is pressed against the left-hand spring, compressing it by 3.7 cm. ...
Friday, March 7, 2014 at 11:40pm

physics
Ricky, the 5.8 kg snowboarding raccoon, is on his snowboard atop a frictionless ice-covered quarter-pipe with radius 9 meters. If he starts from rest at the top of the quarter-pipe, what is his speed at the bottom of the quarter-pipe? Use SI units in your answer. v_{Ricky} =
Friday, March 7, 2014 at 11:19pm

physics
A bartender slides a glass mug with a mass of 520 g along the top of a level bar. The coefficient of kinetic friction between the glass and the bar is 0.09. When the glass leaves the bartender's hand, it is moving, it is moving at a speed of 3.9 m/s. How far does the ...
Friday, March 7, 2014 at 11:03pm

physics
Two forces, 1 = (3.85 − 2.85) N and 2 = (2.95 − 3.65) N, act on a particle of mass 2.10 kg that is initially at rest at coordinates (−2.30 m, −3.60 m). (a) What are the components of the particle's velocity at t = 11.8 s? = m/s (b) In what direction...
Friday, March 7, 2014 at 9:26pm

physics
the cheetah is is one of the fastest accelerating animals, for it can go from rest to 34.5 m/s in 5.00 seconds. if its mass is 106 kg, determine the average powee developes by the cheetah during the acceleration phase of its motion
Friday, March 7, 2014 at 8:44pm

Physics
Know matter how i work it out, i keep getting the wrong answers. please help!!! i only have two more submissions before it closes on me. A sample of blood is placed in a centrifuge of radius 14.0 cm. The mass of a red blood cell is 3.0 x 10^-16 kg, and the magnitude of the ...
Friday, March 7, 2014 at 8:04pm

Physics
Know matter how i work it out, i keep getting the wrong answers. please help!!! i only have two more submissions before it closes on me. A sample of blood is placed in a centrifuge of radius 14.0 cm. The mass of a red blood cell is 3.0 ✕ 10−16 kg, and the ...
Friday, March 7, 2014 at 8:03pm

Physics
A 39.7-kg crate rests on a horizontal floor, and a 65.3-kg person is standing on the crate. Determine the magnitude of the normal force that (a) the floor exerts on the crate and (b) the crate exerts on the person.
Friday, March 7, 2014 at 4:52pm

physics
You must show your work for full credit.) Calculate the circular speed of an object that orbits the Sun at a distance of 0.2 AU (1 AU = 1.5e+11 meters, the distance between the Earth and the Sun)
Friday, March 7, 2014 at 8:54am

Physics
A small cork with an excess charge of +6.0 μC (1 μC = 10^-6 C) is placed 0.12 m from another cork, which carries a charge of -4.3 μC. a. What is the magnitude of the electric force between the corks? b. Is this force attractive or repulsive? c. How many excess ...
Friday, March 7, 2014 at 2:06am

Physics
After a 0.200-kg rubber ball is dropped from a height of 1.95 m, it bounces off a concrete floor and rebounds to a height of 1.45 m. (a) Determine the magnitude and direction of the impulse delivered to the ball by the floor. (b) Estimate the time the ball is in contact with ...
Friday, March 7, 2014 at 12:24am

physics
The lens-to-retina distance of a woman is 1.96 cm, and the relaxed power of her eye is 55.2 D. a) What is her far point? b)What eyeglass power will allow her to see distant objects clearly, if her glasses are 1.80 cm from her eyes?
Thursday, March 6, 2014 at 11:41pm

physics
A 6.0 Ù resistor and a 3.0 Ù resistor are connected in parallel to a 1.5 V battery of negligible internal resistance. What is the current in the 3.0 Ù resistor?
Thursday, March 6, 2014 at 9:22pm

physics
A potential difference of 2.0 V is applied across a wire of cross sectional area 2.5 mm2. The current which passes through the wire is 3.2 × 10-3 A. What is the resistance of the wire?
Thursday, March 6, 2014 at 9:20pm

physics
At a critical junction in a supercomputer, the current as a function of time is given as i(t) = 3t^2-2t, where i is measured in milliamps and t is measured in seconds. How much charge passes through this critical junction during the interval 0 < t < 5.00 s?
Thursday, March 6, 2014 at 9:20pm

physics
A 20kg block is initially at rest on a rough, horizontal surface. A horizontal force of 75N is required to set the block in motion. After it is in motion, a horizontal force of 60N is required to keep the block moving with constant speed. Find the coefficient of static and ...
Thursday, March 6, 2014 at 5:27pm

Physics
A 56 kg swimmer jumps off of 15 m tower. Find the swimmers velocity when hitting the water.
Thursday, March 6, 2014 at 5:22pm

Physics
The maximum emf induced in a 10 turn coil with a cross sectional area of 0.1m squared rotating at 20 rad/s in a uniform 10 Tesla magnetic field is _________.
Thursday, March 6, 2014 at 5:01pm

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