How will using wet ice (some water at 0°C is added along with the ice) affect the experimental value for the latent heat of fusion of ice? Explain
The calculated value for the heat of fusion of ice will be lower, because the mass of
melted ice water in the experiment will be greater.
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A common electromagnet consists of a
A) bar magnet that carries an electric current. B) current-carrying wire coil. C) current-carrying coil with a piece of iron inside.
A dog is standing in the bed of a pickup truck. The bed is coated with ice, causing the force of friction between the dog and the truck to be zero
The truck is initially at rest, and then accelerates to the right, moving along a flat road. As seen from a stationary observer (watching the truck move to the right), the dog A) does not move left or right, but the back of the truck moves towards the dog. B) moves to the right, but not as quickly as the truck is moving to the right, causing it to slide towards the back of the truck. C) moves to the right at the same rate as the truck, so it doesn't slide. D) moves to the left, as the truck moves to the right, causing the dog to slide towards the back of the truck.
What is the wavelength in meters, of a sound wave (v = 340 m/s) with a frequency of 4 Hz?
a. 85 Hz b. 1360 Hz c. 340 Hz d. 0.012 Hz
The escape velocity at the event horizon around a black hole is
a. smaller than the speed of light. b. equal to the speed of light. c. much larger than the speed of light. d. irrelevant since nothing (including light) can escape from a black hole.