If a passenger train is travelling on a straight track with a negative velocity and a positive acceleration, is it speeding up or slowing down?

Two capacitors, one that has a capacitance of 6 µF and one that has a capacitance of18 µF are first discharged and thenare connected in series. The series combination is then connectedacross the terminals of a 12-V battery.

A one-dimensional plane wall of thickness 2l = 100 mm experiences uniform thermal energy generation of q˙ = 800 w/m3 and is convectively cooled at x = ±50 mm by an ambient fluid characterized by [infinity] t[infinity] = 26.0°c.

A meteoroid changed velocity from 1.0 k/s to 1.8 k/s in 0.3 seconds. What is the acceleration of the meteoroid?

In the scientific method, a hypothesis is a

What is temperature? A: The same thing has heat energy B: The amount of calories in a substance C: An indirect measure of heat energy

A substance has a density of 13.5 g/cm3. What is the volume of a 50 g block of this substance?

Select all of the answers that apply. Which statements are true regarding the scientific evidence supporting the big bang theory? Researchers found cosmic microwave background radiation, which is a heat imprint left over from the big bang.

How are magnetic poles and electrical charges similar? A. Their same forces repel each other, and their opposite forces attract each other. B. Their same forces attract each other, and their opposite forces repel each other. C.

As part of his meal, a workman has a cup containing a hot drink. In order to keep the drink hot whilst he eats the rest of his meal, he covers the cup, as shown in the figure. Which sources of energy loss does this action reduce? Tick two boxes.

When energy is transformed, the amount of usable energy?