Electromagnetic technology becomes more advanced to fill ever more complex roles. Which of these is an application of electromagnets?

A. car brake systems

B. refrigerator coils

C. speaker and microphone

technology

D. all of these

If one were driving a car with a velocity of - 30 km/h, that would mean that: they were driving at 30 km/h but in the reverse gear they were driving to the west or south (a predetermined negative) they were traveling back in time velocity cannot be

Problema 1 Dos ciudades A y B están separadas por una distancia 1200 Km. Desde A sale hacia B un móvil con velocidad constante de 50 Km/h. una hora y media después sale desde B hacia A otro móvil con velocidad constante de 85 Km/h.

Lightning sometimes happens between clouds. suggest a possible way that a discharge can occur between clouds

A friend says that tempature increases as altitude increases because you are moving closer to the sun. Is this true?

Use the formula h = - 16t2 + v0t. (if an answer does not exist, enter dne.) a ball is thrown straight upward at an initial speed of v0 = 56 ft/s. (a) when does the ball initially reach a height of 40 ft?

Under what condition (s) will an object be in equilibrium? Notice that equilibrium in physics has a broader definition. (A) Only if it is moving with constant velocity. (B) Only if it is at rest.

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.