What is the minimum energy needed to change the speed of a 1600-kg sport utility vehicle from 15.0 m/s to 40.0 m/s?
A) 1.10 MJ
B) 10.0 kJ
C) 20.0 kJ
D) 40.0 kJ
E) 0.960 MJ
A
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Ideal Gas Law: An ideal gas has a pressure of 2.5 atm, a volume of 1.0 L at a temperature of 30°C. How many molecules are there in this gas? (R = 8.31 J/mol ? K,1.00 atm = 101 kPa, NA = 6.022 × 1023)
A. 6.1 × 1023 B. 6.0 × 1022 C. 2.4 × 1022 D. 2.3 × 1023
Which of the following statements about the moons of the jovian planets is true?
A) Most of the moons have the potato-like shapes of asteroids, but a few are large enough to be spherical in shape. B) Even the biggest moons are smaller than any of the planets or dwarf planets in our solar system. C) All of the moons are barren and essentially airless, like our own Moon. D) The moons are made almost entirely of rock and metal.
A student is sitting on the right side of a school bus when it makes a right turn. We know that the force of gravity acts downwards and a normal force from the seat acts upwards. If the student stays in place when the bus turns, we also know that there must be
a. no other force on the student. b. a force parallel to the seat directed forward on the student. c. a force parallel to the seat directed to the left on the student. d. a force parallel to the seat directed to the right on the student. e. a force parallel to the seat in a direction between forward and left on the student.
Gamma radiation is used to kill harmful bacteria in food
Indicate whether the statement is true or false