Physics, 03.01.2020 04:31 thickness7699
Two blocks of ice , one four times as heavy as the other, aren at rest on a frozen lake. a person pushes each block the same distance d. ignore friction and assume that an equal force f is exerted on each block. which of the following statements is true about the kinetic energy of the heavier block after the push? a) it is smaller than kinetic energy of the lighter blockb) it is equal to the kinetic energy of the lighter blockc) it is larger than the kinetic energy of the lighter blockd) it cannot be determined without knowing the force and the mass of each block
Answers: 2
Physics, 22.06.2019 18:00
Which of the following is not a physical property of mattera. melting pointb.heat of combustionc. viscosityd. boiling point
Answers: 1
Physics, 22.06.2019 18:00
Wind and moving water provide energy. question 1 options: chemical mechanical thermal none of the above
Answers: 1
Physics, 22.06.2019 21:40
Ahair dryer is basically a duct in which a few layers of electric resistors are placed. a small fan pulls the air in and forces it through the resistors where it is heated. air enters a 1200 w hair dryer at 100 kpa and 22°c and leaves at 47°c. the cross-sectional area of the hair dryer at the exit is 60 cm2. neglecting the power consumed by the fan and the heat losses through the walls of the hair dryer, determine (a) the volume flow rate of air at the inlet and (b) the velocity of the air at the exit.
Answers: 1
Physics, 22.06.2019 23:40
A2.50 × 105 w motor is used for 26.4 s to pull a boat straight toward shore. how far does the boat move toward shore if a force of 4.20 × 104 n is applied by the motor?
Answers: 2
Two blocks of ice , one four times as heavy as the other, aren at rest on a frozen lake. a person pu...
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