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A 17.0 kg child on a 3.00 m long swing is released from rest when the ropes of the swing make an angle of 26.0° with the vertical. (a) Neglecting friction, find the child's speed at the lowest p
How far from the edge of the counter does the cat land? What is cat's velocity when it lands on the counter?
Q1. A balloon is electrosatically charged with 3.4 uC (microcoulombs) of charge. A second ballon 23 cm away is charged with -5.1 uC of charge. the force of attraction/repulsion between the two charg
What is/are the equation that you begin with and how are the boundary conditions applied to them in order to get to a calculable equation for fundamental frequency?
The highest note on a viola (a musical instrument which is a member of the violin family) is found on the A string, which has a fundamental frequency of 440 Hz. The tension of this A string is 128
Gerardo tosses a ball straight up. Neglecting air resistance, which of the following choices best describes the forces acting on the ball after it leaves gerardo's hand but before it reaches its pea
Calculate the velocity of the mass when it has traveled a distance x = 0.120 m along the friction surface.
The closely packed cones in the fovea of the eye have a diameter of about 2 micrometers. For the eye to discern two images on the fovea as distinct, assume that the images must be separated by at le
A charge of +9q is fixed to the corner of a square while a chage of -8q is on the diagonally opposite corner. What Charge (in terms of q) should be put at the corner so that the potential is 0 at th
A cylindrical conductor with radius a carries a current with a current density kr^2. a) Find the total current in the conductor.
A picture is suspended by two wires of equal length. Each wire makes an angle θ with the horizontal. a. Predict whether the tension in the wires will increase or decrease as the picture gets h
In a women's 100 m race, accelerating uniformly,Laura takes 2.00s and Healan 3.00s to attain their maximum speeds, which they each maintain for the rest of the race.
Determine the gravitational force between the particles. (d) Which force holds the electron to the nucleus? How do you know?
Four -5µC charges (m = 5.0 x 10-10 kg) are brought together from infinity to form a square with sides 3 mm in length. (a) How much work must be done to accomplish this? (b) If the charges were
A charged spherical shell for radius R has 8 µC of charge uniformly distributed over is surface. At the exact center a point charge of -8 µC exists. What is the strength of the electric
Ice (intial at 0 degree C) is added to 0.69 L of tea at 16 degree C to make coldest possible iced tea. If enough ice is added so the final mixture is all liquid, how much liquid is in the pitcher wh
Assume that all the power delivered to the wires is used immediately to melt the ice. Find the cross-sectional area of each wire.
A cylindrical copper cable carries a current of 1200 A. There is a potential difference of 1.6*10^-2 V between two points on the cable that are 0.24 m apart. What is the radius of the cable?
An insulated beaker with negligible mass contains liquid water with a mass of 0.205kg and a temerature of 67.1 degree C. How much ice at a temperature of -14 degrre C must be drop into the water so
Your 2.25kg physics book rest on a horizontal tabletop. a) find the normal force on the book b) suppose you pull up on the book with a 15.0 N force. Now what's the normal force?
Suppose you apply the brakes and do not turn the steering wheel. Find the minimum distance you must be from the wall to avoid a collision
A 1.5 kg mass is shot straight up with an initial speed of 3 m/s. What is the kinetic energy of the mass when it is launched, how much work does the gravitational force do on the mass during its acc
If the gravitational potential energy U of the earth-rock system is 0 at the bottom of the will, what is the value of U just before the slide, how much energy is transferred to the thermal energy du
A 390-m-wide river has a uniform flow speed of 2.0 m/s through a jungle and toward the east. An explorer wishes to leave a small clearing on the south bank and cross the river in a powerboat that mo
After flying for 13 min in a wind blowing 44 km/h at an angle of 18° south of east, an airplane pilot is over a town that is 52 km due north of the starting point. What is the speed of the airpl