Suppose that a car traveling to the West (-x direction) begins to slow down as it approaches a traffic light. Make a statement concerning its acceleration
A) The car is decelerating, and its acceleration is positive.
B) The car is decelerating, and its acceleration is negative.
C) The acceleration is zero.
D) A statement cannot be made using the information given.
A
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A transverse periodic wave is represented by the equation y(x, t) = 2.50 cm cos(2,500 rad/s t - 15.0
x). What is the velocity of the wave?
A. 450 m/s in the - y direction B. 333 m/s in the + y direction C. 333 m/s in the + x direction D. 167 m/s in the - x direction E. 167 m/s in the + x direction
A constant volume and mass of helium gas at 77°C is heated so that the pressure of the gas doubles. What is the new temperature of the gas in Celsius degrees?
a. 154°C b. 273°C c. 427°C d. 700°C
Newton's second law is valid only in inertial reference frames
Indicate whether the statement is true or false
Three particles, each of which has a mass of 80 g, are positioned at the vertices of an equilateral triangle with sides of length 60 cm. The particles are connected by rods of negligible mass. What is the moment of inertia of this rigid body about an axis that is parallel to one side of the triangle and passes through the respective midpoints of the other two sides?
A. 0.018 kg?m2 B. 0.020 kg?m2 C. 0.016 kg?m2 D. 0.022 kg?m2 E. 0.032 kg?m2