calculate the time taken to raise the temperature of 1.5 kg of water in a kettle from 15°C to 100°C given that specific heat capacity of water is 4200 J/kg/K and the heater is rated 250V, 2kW

How much energy does a 100-W light bulb use in 10 s? A) 10 J B) 100 J C) 1000 J D) 10 000 J

Us your understanding of asexual reproduction to explain why is it important that organisms reproduce in a variety of ways.

A typical student listening attentively to a physics lecture has a heat output of 100 w. how much heat energy does a class of 170 physics students release into a lecture hall over the course of a 50 min lecture?

A 48 kg girl is standing on a chair. What is the force exerted by the chair?

A car takes 8s to increase its velocity from 10m/s to 30m/s. what is its average acceleration?

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

At a certain location, the horizontal component of the earth's magnetic field is 2.5 * 10-5 T, due north. A proton moves eastward with just the right speed for the magnetic force on it to balance its weight. Find the speed of the proton.

An acrobatic airplane performs a loop at an airshow. The centripetal acceleration the plane experiences is 14.7 m/s2. If it takes the pilot 45.

Which of the following was NOT an outcome of Bacon's rebellion? A. A more direct focus on the "Indian Problem" B. A more focused plain to isolate black slaves from white servants C.

A science class did an investigation to see how many breaths it took for each student to blow up a balloon. Jason blew up his balloon with the fewest breaths. Which of these might explain why Jason took fewer breaths to blow up his balloon? A.