An insulating sphere of radius a, centered at the origin, has a uniform volume charge densityrho.
A spherical cavity is excised from the inside of the sphere. The cavity has radius \frac{a}{4} and is centered at position h_vec, where |\vec{h}|<\frac34 a , so that the entire cavity is contained within thelarger sphere. Find the electric field inside the cavity.
Express your answer as a vector interms of any or all of rho, epsilon_0, r_vec, and h_vec.

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.