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In the other two corners are placed charges of +3.0 uC and -3.0 uC. what is the magnitude of the electric field at the square's center? answer in N/C please.
A buffer is to be prepared with a pH of 4.5 from 0.1M solutions of sodium acetate and acetic acid. How many mL of 0.1M NaAc would have to be added to 100mL of 0.1M HAc to make the proper buffer s
Bjorn is standing at x1 = 550 m. Firecracker 1 explodes at the origin and firecracker 2 explodes at x2 = 850 m. The flashes from both explosions reach Bjorn's eye at t = 4.0 \mu s.
The heat capacity of the bomb calorimeter is 34.65 kJ/K and the combustion of 1.765 g of ethanol raises the temperature of the calorimeter from 294.33 K to 295.84 K.
Lithium has two stable isotopes, 6Li and 7Li. If a sample is composed of 39% of the lighter isotope (with the balance being 7Li), calculate the average molar mass of the sample.
On a frictionless air track, a 0.125 glider moving at 1.05 to the right collides with and sticks to a stationary 0.235 glider. What is the net momentum of this two-glider system before the collision?
Consider the circuit in the figure below. Take = 6.00 V, L = 6.00 mH, and R = 8.00 O. What is the inductive time constant of the circuit?
A 2.00 kg projectile is fired at an angle of 20.0° above the horizontal. What is the magnitude of the net force exerted on the projectile when it is at the highest position in its trajectory?
Hydrogen atom number 1 is known to be in the 4f state. Hydrogen atom number 2 is in the 5d state. What is the energy of atom 1? What is the magnitude of the orbital angular momentum of atom 1?
Two capacitors give an equivalent capacitance of 9.0pf when connected in parallel and an equivalent capacitance of 2.0pf when connected in series. What is the capacitance of each capacitor?
An electric field exerts a force of 3.00 x 10-4 N on a positive test charge of 7.50 x 10-4 C. Find the magnitude of the field at the charge location.
Two slits separated by 0.75 mm are illuminated with light of an unknown wavelength and an interference pattern is observed on a screen 8.0 m away.
A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the mag
The diffraction pattern is observed on a screen 4.8 m away from the slit and the central maximum is 17 cm wide. What is the width of the slit?
An isolated capacitor of unknown capacitance has been charged to a potential difference of 100V. When the charged capacitor is disconnected from the battery and then connected in parallel to an unch
What is the speed at the top of the loop-to-loop? What is the normal force of the loop on the box at the top of its motion?
What is the magnitude of the free-fall acceleration of a ball (mass m) due to the Earth's gravity at an altitude of 2.73R, where R is the radius of the Earth?
White light is spread out into its spectral components by a diffraction grating. If the grating has 1990 lines per centimeter, at what angle does red light of wavelength 640 nm appear in first-order
A solenoid with a certain number of turns N and carrying a current of 2.000 A has a length of 34.00 cm. If the magnitude of the magnetic field generated at the center of the solenoid is 9.000 mT, wh
If the light had been composed of light with wavelengths of 480 nm, 580 nm, 680 nm, at what angle would the first-order peak of each of these wavelengths appear?
A concrete cube, 0.5 meters on each side, is lowered beneath the surface of a lake. At what depth is the water around it exerting an inward force of 170000 newtons on each face of the cube?
A particle with charge q is at rest when a magnetic field is suddenly turned on. The field points in the z-direction. What is the direction of the net force acting on the charged particle?
Planet A has a radius of 750 km and an acceleration due to gravity of .47 m/s^2. What are the escape speed from its surface and the maximum height an object will rise being fired directly upward at
If the vehicle has a speed of 20.2 m/s at point A, what is the force exerted by the track on the car at this point?
A 100 g cube of ice at 0 degrees C is dropped into 1.3 kg of water that was originally at 82 degrees C. What is the final temperature of the water after after the ice melts? The latent heat of fusio