Nhiệt phân hết 4,9g Cu (OH)2. Tính khối lượng chất rắn thu được sau phản ứng

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

The ozone molecule o3 has a permanent dipole moment of 1.8×10−30 cm. although the molecule is very slightly bent-which is why it has a dipole moment-it can be modeled as a uniform rod of length 2.5×10−10 m with the dipole moment perpendicular to the axis of the rod. suppose an ozone molecule is in a 8000 n/c uniform electric field. in equilibrium, the dipole moment is aligned with the electric field. but if the molecule is rotated by a small angle and released, it will oscillate back and forth in simple harmonic motion.what is the frequency f of oscillation?