What early advance first increased the ability to communicate over long distances?

Logan observes a paramecium under a microscope. The eyepiece of the microscope has a horizontal scale marked in mm. The paramecium starts at the 65 mm mark and ends up at the 39 mm mark.

The suffix "-ose" indicates

An MP3 player draws a current of 0.120 ampere from a 3.00-volt battery. What is the total charge that passes through the player in 900. seconds? (1) 324 C (3) 5.40 C (2) 108 C (4) 1.80 C

Jake calculates that the frequency of a wave is 230 hertz and that the wave is moving at 460 m/s. What is the wavelength of the wave?

Two stars of mass m and M, separated by a distance d, revolve in circular orbits about their center of mass. Show that each star has the same period and find it.

A cell provides 6 V to an LDR. The current through this LDR is measured and is found to be 3 A. What is the resistance of the LDR?

A car travels along eastward with a constant velocity. the magnitude of the acceleration of the car is

What is the weight of a 65 kg astronaut on mars?

When lava cools, what type of Rock forms?

A uniformly charged conducting sphere of 1.1 m diameter has a surface charge density of 6.2 µC/m2. (a) Find the net charge on the sphere. (b) What is the total electric flux leaving the surface of the sphere?