Do all electromagnetic waves travel at the speed of light, carry energy, and travel through a vacuum?

7) Three resistors having resistances of 4.0 Ω, 6.0 Ω, and 10.0 Ω are connected in parallel. If the combination is connected in series with an ideal 12-V battery and a 2.0-Ω resistor, what is the current through the 10.0-Ω resistor? A) 0.59 A B) 2.

Gold has a specific heat of 129 J/kg°C. How many joules of heat energy are required to raise the temperature of 0.015 kilograms of gold from 22°C to 85°C? 144

An atom with an atomic number of 12 and a mass number of 25 can best be described by which of these? A) An atom that contains 12 protons and 13 neutrons. B) An atom that contains 13 protons and 12 neutrons.

A rock is dropped from a height of 80 m and is in free fall what is the velocity of as it reaches the ground 4.0 seconds later

The opera station signals broadcasts at 90.5 MHz and the rock and roll station broadcasts at 107.1 MHz. Which station signal has waves with longer wavelengths? Which station's signal has waves with higher energy?

If a pressure gauge measure an increase in 3*10^ (5) Pa on an area of 0.7 m^2, calculate the increase in the force applied to the area?

Which of the following is an example of potential rather than kinetic energy? a. water rushing over Niagara Falls b. a molecule of glucose c. a crawling beetle foraging for food d. light flashes emitted by a firefly

If a force of 15 newtons [N] is applied to a surface and the pressure is measured as 4,000 pascals [Pa], what is the area of the surface in units of square milimeters [mm2 ]?

An engineer has the task of producing an aluminum alloy with a density of 3.0 grams per cubic centimeter. She comes up with the perfect alloy and saves a sample of it. Which mass and volume measurements correspond to this sample? 7 g and 2.

What must be your car's average speed in order to travel 235km in 3.25 hours?