Select the correct answer. The successful launch of Sputnik 1 was the first instance of what? A. satellite communication B. use of the Internet C. computer-operated robotics D. use of a GPS device

7. Geostationary satellites travel in what direction north and south latitudinally east and west longitudinally are geosynchronous with earth rotation Never move

Radio telescopes uses mirrors to focus the image of a planetary body. A True B False

Which of the following has the greatest magnitude of momentum? A roadrunner with a mass of 1.8 kg moving at a velocity of 6.7m/s A hare with a mass of 2.7 kg moving at a velocity of 7.5m/s A turtle with a mass of 91 kg moving at a velocity of 1.4m/s A tortoise with a mass of 275 kg moving at a velocity of 0.55m/s

Who came up with the law of universal gravitation? A Newton B Einstein C Brahe D Octopian

The half-life of a radioactive substance is 3 days and the initial (original) amount was 16 mg. What is the mass 7 weeks after the start? square Note: Make sure to change weeks to days

density=(mass)/(volume) What is the mass of a sample that has a density of 2.70g/ml and occupies 1.2 ml of volume? 3.248 3.24 ml 2.258 2.25 ml 0.4448

Check all of the following changes that would increase the pressure inside a tank of helium gas. Heat the tank up by placing it in an oven. Use some of the helium to fill some balloons. Cool the tank down by placing it in a freezer. Add more helium atoms to the tank.

Your cell phone call can be dropped because of solar activity. True False

A colorful are in the sky caused by sunlight being refracted, reflected and dispersed by water droplets Compression Arch Amplified Light Wave Mountain Rainbow

Hot Questions

When light is reflected from a smooth, plane mirror Multiple Choice the angle of reflection is the same as the angle of incidence. most of the light is scattered into multiple directions. the light is changed to a lower frequency. the wave characteristics are predominant.

When a light wave approaches a glass-air interface from the glass side at the critical angle, the angle of refraction is . __ $43^{\circ }$ $48^{\circ }$ o $45^{\circ }$

Which of the following will induce a greater emf in the secondary coil of a generator? A constant potential in the primary coil. A greater number of loops in the primary coil. A fewer number of loops in the secondary coil. A smaller area in the secondary coil.

Which of the following is accurate about the Coriolis Effect? The apparent deflection of objects is zero at the equator. The apparent deflection of objects is greatest at the equator. The apparent deflection of objects is the same at all locations on the globe. The apparent deflection of objects is the least at the Poles.

The insulation in walls uses which of the following methods to prevent heat transfer? (select all that apply) A convection B radiation C conduction

Heat that we can feel and is measurable is called: Heat cannot be measured Illogical Latent Sensible

The period of the moon's rotation on its axis is the same as its revolution around the Earth much longer than its revolution around the Earth longer or shorter depending on what part of the year we are in much shorter than its revolution around the Earth

33. What are the two ways that light quality can be characterized? direct or indirect light bright and dim light hard and soft light round and curved light

A soccer player runs up behind a soccer ball (of mass 0.50 kg) that is moving at $3.5m/s$ in the same direction as the player. The soccer player kicks it and the ball moves with a speed of $13.5m/s$ What is the magnitude of the impulse (in $kgm/s)$ delivered to the soccer ball? A 5.0 B 7.5 C 10 D 15

What path can a light ray travel through the glass core of an optical fiber? angle of incidence angle of refraction light coupling mode