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An object with a charge of -3.8 µC and a mass of 0.046 kg experiences an upward electric force, due to a uniform electric field, equal in magnitude to its weight.
(a) Find the direction and magnitude of the electric field.
(b) If the electric charge on the object is halved while its mass remains the same, find the direction and magnitude of its acceleration.
a water balloon is launched from ground level with an initial velocity of 12.4 m/s @ 27.0° above the horizontal. Find how high it goes above the launch height
Determine the maximum and minimum of the absolute value of the magnetic flux through a large triangular wire loop that has three equal sides of 1.85 m
Calculate the vertical component of its velocity by the time it hits the ground
If you weigh 690 N on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 25.0 km.
An explosive charge imparts a velocity of 10,350 feet per second to a mortar as it exits the muzzle of mortar. If the mortar is elevated at 80 degrees what are the horizontal and vertical velocities on the mortar shell.
A 0.51 kg mass at the end of a spring vibrates 9.0 times per second with an amplitude of 0.18 m. Determine the total energy of the system
An electron is moving at a speed of 1.2 104 m/s in a circular path of radius of 1.9 cm inside a solenoid. Find the strength of the magnetic field and current inside the solenoid
The period of a pendulum is 0.215 s on Earth. The period of the same pendulum is found to be 0.467 s on planet X, whose mass is equal to that of Earth.
A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 4.57 m/s relative to the ground. How fast is the train moving
The drawing shows an intravenous feeding. With the distance shown, nutrient solution (? = 1010 kg/m3) can just barely enter the blood in the vein. What is the gauge pressure of the venous blood
Consider the following circuit with emf = 12 V, C = 2 microF, L = 6 microH, and R = 6ohms. What is the value of the energy stored in the inductor
In one day, a 90kg mountain climber ascends from the 1520m level on a vertical cliff to the top at 2360m, What is her change in gravitational potential energy on the first day
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