Calculate the energy in the form of heat (in kJ) required to change 75.0 g of liquid water at 27.0 °C to ice at –20.0 °C. Assume that no energy in the form of heat is transferred to the environment. (Heat of fusion = 333 J/g; heat of vaporization = 2256 J/g; specific heat capacities: ice = 2.06 J/g·K, liquid water = 4.184 J/g·K)
Answers: 3
Physics, 22.06.2019 19:40
Two charged particles, q1 and q2, are located on the x-axis, with q1 at the origin and q2 initially at x1 = 12.2 mm. in this configuration, q1 exerts a repulsive force of 2.62 µn on q2. particle q2 is then moved to x2 = 18.0 mm. what is the force (magnitude and direction) that q2 exerts on q1 at this new location? (give the magnitude in µn.)
Answers: 1
Physics, 22.06.2019 19:50
An electron moves with a constant horizontal velocity of 3.0 × 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 26 cm horizontally and 19 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)
Answers: 2
Physics, 22.06.2019 21:30
In the illustration, which two simple machines are being used to enable the student to reach the door? a. inclined plane and pulley b lever and wheel-and-axle c pulley and lever d wheel-and axle and inclined plane
Answers: 1
Physics, 23.06.2019 21:50
A500-watt vacuum cleaner is plugged into a 120-volt outlet and used for 30 minutes. how much current runs through the vacuum? 900,000 amps 60,000 amps 4.2 amps 0.24 amps
Answers: 3
Calculate the energy in the form of heat (in kJ) required to change 75.0 g of liquid water at 27.0 °...
Mathematics, 19.07.2019 10:40
Mathematics, 19.07.2019 10:40
Mathematics, 19.07.2019 10:40
History, 19.07.2019 10:40
History, 19.07.2019 10:40
Mathematics, 19.07.2019 10:40
Mathematics, 19.07.2019 10:40
Geography, 19.07.2019 10:40