Month: February 2022

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation…

Mga halaman/punong ornamental na di namumulaklak…

The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 × 1013 rad/s. the mass of a nickel atom is 9.75 × 10-26 kg. what is the difference in…

Three resistors are connected in series across a 15-v power supply. if the potential drops across resistors 1 and 2 are 4.1 volts and 3.1 volts, what is the exact potential drop (i…

If you let go of the notebook after lifting it, will it move? how?…

Energy transformations that involve one transformation from one type of energy to another are called transformations….

When you see distant streetlights through smog, they look dimmer and redder than they do normally. but when you see the same streetlights through fog or falling snow, they look dim…

You have 80 g of 60oc water and 80 g or 10oc water. what is the final temperature when the two are mixed? explain….

1) light given off by distant galaxies is shifted twords the red end of the electromagnetic spectrum. what does this tell us about the motion of galaxies? 2) galaxies that are fur…

One kind of e-book display consists of millions of very small spheres that float in a thin fluid layer between two conducting transparent plates. each sphere is black on one side a…

Now that we have a feel for the state of the circuit in its steady state, let us obtain the expression for the current in the circuit as a function of time. note that we can use th…

As a pendulum moves closer to the equilibrium position, how do the velocity, acceleration, and force change? the velocity decreases, the acceleration decreases, and the net force…

Ateam of astronauts is on a mission to land on and explore a large asteroid. in addition to collecting samples and performing experiments, one of their tasks is to demonstrate the…

Give one example to show that when substances are mixed, it may result in a chemical or a physical change depending on the conditions….

You charge a parallel-plate capacitor, remove it from the battery, and prevent the wires connected to the plates from touching each other. when you increase the plate separation, w…

Alarge cruise ship of mass 7.00 ✕ 107 kg has a speed of 11.6 m/s at some instant. (a) what is the ship’s kinetic energy at this time? (b) how much work is required to stop it? (g…

Another word for electromagnetic energy is a. heat b. force c. matter d. radiation…

What was the purpose of the apollo program? to put a man in orbit to launch a spy satellite to launch a space station to put man on the moon…

“if the pressure acting on an ideal gas at constant temperature is tripled, its volume isa) reduced to one-third. b) increased by a factor of three. c) increased by a factor of two…

1. what is the si unit of emf? 2.a complete series circuit consists of a 12.0 v battery, a 4.70 ω resistor, and a switch in the closed position. the internal resistance of the batt…

Is the ability of one substance to dissolve in another….

Planets in our solar system do not revolve around the sun in perfect circles. their orbits are nore like ovals. which term do scientists use to describe these orbits…

A(n) is formed when atoms share one or more electrons…

If a weighted, air-filled balloon sinks in a lake, it will a. be buoyed up with constant force while sinking b. probably sink to the bottom and probably rise later c. sink until i…