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The distance that a certain particle moves may be calculated from the expression d= at+bt^2 where a and b are constants and t is elapsed time, what must the dimesions of the quantities A and B be re
By considering the conservation of both energy and momentum, find the speeds of both spheres after they are released and at the point just before they collide.
Calculate the maximum height above the roof reached by the rock. Calculate the magnitude of the velocity of the rock just before it strikes the ground.
At time = 19.3 , what are the x-component of the dog's velocity? 2-At time = 19.3 , what are the y-component of the dog's velocity? Express your answer using two significant figures.
What is the magnitude of the other horizontal forces acting on the child, besides the tension in the handle? Assume the child moves along with the wagon.
A child pulls an 15 kg- wagon with a horizontal handle whose mass is 1.9 kg , accelerating the wagon and handle at 2.5 m/s^2 . A. Find the tension force at end of the handle near to the child. B. Fi
We have ammeter and we measure the current of a bulb. When the ammeter is set on 300ma and the bulb is not as bright. But when the ammeter is set to 3A the bulb is brighter then before and the meter
The frequency of oscillation depends on the restoring force of the web and the mass of the insect. Spiders respond more quickly to larger - and therefore more valuable - prey, which they can disting
How much power does each dog supply to p the sled/driver system at a constant speed of 9.00 m/s where the coefficient of friction between the sled and the snow is 0.150?
Calculate the frequency of the dampened oscillation. Hz (b) By what percentage does the amplitude of the oscillation decrease in each cycle?
(a) Explain why the bump, from your viewpoint behind the car, executes simple harmonic motion (b) If the radii of the car's tires are 0.425 m, what is the bump's period of oscillation?
At which point in the travel of the mass is the kinetic energy of the mass at its maximum?
A component with a 34 Ohm resistor is rated for use at power levels not exceeding 2,059 mW. How much current can safely flow through the component? Express the answer with two decimal places.
Determine the potential energy when the position is one-third the amplitude. (Use any variable or symbol stated above as necessary.)
A car is driven at constant speed over a circular hill and then into a circular valley with the same radius. At the top of the hill, the normal force on the driver from the car seat is 0. The drive
What is the tangential acceleration at this point? What is the centripetal acceleration at this point? What is the least coefficient of static friction which will prevent the car from skidding in co
Consider Compton scattering event in which the scattering photon has an energy of 120 keV and the recoiling electron has an energy of 40 keV. a) Calculate the wavelength of the incident photon,
A tugboat captain also sees the submarine fire the projectile, but to him is looks like the projectile is moving straight up (i.e. 90° above the horizontal). What is the velocity of the tugboat
A square loop of wire of side 3.3 cm carries 3.0 A of current. A uniform magnetic field of magnitude 0.67 T makes an angle of 43° with the plane of the loop. (a) What is the magnitude of the tor
A coil of Nichrome wire is 31.0 m long. The wire has a diameter of 0.360 mm and is at 20.0°C. (a) If it carries a current of 0.580 A, what is the magnitude of the electric field in the wire?
An aluminum rod has a resistance of 3.30 ? at 20.0°C. Calculate the resistance of the rod at 120°C by accounting for the changes in both the resistivity and the dimensions of the rod. The co
A 10-kg block is dragged up a 30° rough ramp by an applied force F. The coefficients of static and kinetic friction between the block and the ramp are 0.8 and 0.5 respectively. (a) Find the maxi
Model the sap as water initially at 32.0°C. Water has a specific heat of 4 186 J/kg · °C, a boiling point of 100°C, and a latent heat of vaporization of 2.26 x 106 J/kg. kg
Two charged particles A and B are located near one another. Both the magnitude and direction of the force that particle A exerts on particle B is independent of the sign of charge B. the sign of cha
The superconducting magnet for the experimental MRI studies at a laboratory is a 1m long solenoid of 60 cm diameter, producing a field of 5T. The current energizing the device is 250A. a) how many