A baking tray is made of metal because its

An electron moves with a speed of 8.0 * 10^{6} m/s along the + x-axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of 60° to the + x-axis and lying in the xy-plane.

Which identifies an electrically neutral atom that gains electrons? A. negative ion B. positive quanta C. positive photon D. negative isotope

How do the planets Venus and Neptune differ in terms of atmospheric composition? (A) Venus has carbon dioxide in its atmosphere, while Neptune has methane in its atmosphere.

A person eats a dessert that contains 280 Calories. (This "Calorie" unit, with a capital C, is the one used by nutritionists; 1 Calorie = 4186 J.) The skin temperature of this individual is 36°C and that of her environment is 17° C.

A hot iron ball of mass 200 g is cooled to a temperature of 22°C. 6.9 kJ of heat is lost to the surroundings during the process. What was the initial temperature of the ball? (ciron = 0.444 J/g°C) A) 23°C B) 78°C C) 100°C D) 155°C

Which of the following best describes the ultraviolet catastrophe of blackbody radiation? A. As energy is added to an object acting as a blackbody radiator, its emissions move to the ultraviolet part of the electromagnetic spectrum. B.

Is an engine-activated booster unit that reduces the effort required to apply the hydraulic brakes

A box is lowered using a rope. If the acceleration of the box, is 2.5 m/s2 (downward) and the tension in the rope is 31 N, what is the mass of the box (in kg) ?

On a very hot summer day, the rooms on the first floor of a house stay cooler than the rooms on the second. Which form of thermal energy flow causes this to occur? A) Conduction B) Convection C) Kinetic D) Radiation

What is a ion in science?