Water pressurized to 4 × 10^5 Pa is flowing at 5.0 m/s in a pipe which contracts to 1/3 of its former area. What are the pressure and speed of the water after the contraction? (density of water = 1 × 10^3 kg/m3)
a. 2 × 10^5 Pa, 15 m/s
c. 3 × 10^5 Pa, 15 m/s
b. 3 × 10^5 Pa, 10 m/s
d. 4 × 10^5 Pa, 1.5 m/s
C
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A circular loop carrying a current of 3.0 A is oriented in a magnetic field of 0.35 T. The loop has an area of 0.24 m2 and is mounted on an axis, perpendicular to the magnetic field, which allows the loop to rotate. What is the torque on the loop when its plane is oriented at a 50° angle to the field?
a. 4.6 N×m c. 0.076 N×m b. 0.16 N×m d. 0.23 N×m
The original cloud from which the sun and planets formed had a composition rich in hydrogen and helium
Indicate whether the statement is true or false
A spacecraft traveling through the asteroid belt has a high risk of being destroyed through a collision
Indicate whether the statement is true or false
Earth's oceanic crust ranges in thickness from about
a. 98 to 140 km. b. 5 to 11 km. c. 19 to 98 km. d. 18 to 26 km.