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Q1. What mass (in grams) of steam at 100°C have to be mixed with 277 g of ice at its melting point, in a thermally insulated container, to make liquid water at 28.0°C? The specific heat of water is 4186 J/kg•K. The latent heat of fusion is 333 kJ/kg, and the latent heat of vaporization is 2256 kJ/kg.
Q2. The summit of a mountain, 2085 m above base camp, is measured on a map to be 4580 m horizontally from the camp in a direction 32.4 degree west of north. What are the components of displacement vector from camp to summit? What is its magnitude? Decide the x axis east, y axis north, and z axis up.
Q3. A 410 g air-track glider attached to a spring with spring constant 10 N/m is sitting at rest on a frictionless air track. A 280 g glider is pushed toward it from the far end of the track at a speed of 120 cm/s. It collides with and sticks to the 410 g glider. What are amplitude and period of the subsequent oscillations?
How many times hotter than the Sun's surface is the surface of a star the same size, but that gives off twice the Sun's energy per second (that is, is twice as luminous)?
A hardworking ant must supply 0.00655 N to pull a small piece of fruit at constant velocity over a distance of 8.00 cm up a small hill to the entrance of the colony. Use the work-energy theorem to calculate the mass of the piece of fruit in grams
A Carnot engine performs work at the rate of 480 kW while using 760 kcal of heat per second. If the temperature of the heat source is 571°C, at what temperature (in Celsius) is the waste heat exhausted
An electric trimmer blade has rotational inertia 2.00×10?4kg?m2. How much work was done to accelerate the blade
q1. for an ideal atwood machine has a massless pulley of radius 10 cm which moves without friction and has masses of 2
a straightforward method of finding the density of an object is to measure its mass and then measure its volume by submerging it in a graduated cylinder, What is the density of a 220 g rock
If you are designing a lander for Venus in the shape of a hemisphere 2.6m in diameter, how many newtons of inward force must it be prepared to withstand due to the Venusian atmosphere
A test tone used on a radio has a frequency of 951 Hz. What is the wavelength of this sound in air at normal room temperature
The biggest asteroid (Asteroid 2005 YU55 400 m wide) to cruise by the Earth in 35 years made its closest approach on Tuesday November 11/08/2011 at 6:28 p.m. (PST). Find the acceleration and speed of the asteroid in its circular orbit
A technician wraps wire around a tube of length 37 cm having a diameter of 8.3 cm. If the current in this solenoid increases at the rate of 2 A/s, what is the self-induced emf in the solenoid
Two charges are fixed on the x axis: one with a charge of = 5.00 at = -1.00 and the other with a charge of = 3.00 at = 1.50 . Find the force exerted on a charge = -5.00 placed at the origin (x=0). What are the magnitudes of the three charges q, q1..
Coin is placed 14.0 from the axis of the rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on turntable until a rate of 40.0 (revolutions per minute) is reached, at that point the coin s..
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