Consider a piezoresistive sensor with the Wheatstone bridge circuit. In this circuit, R1 and R4 have fixed resistance of 10 kΩ while R2 and R3 are piezoresistors which have 10 kΩ + ΔR. The bias voltage V of the Wheatstone bridge circuit is 3 V. Both piezoresistors have piezoresistivity coefficient of 70 x 10-11 Pa-1 and under 1 MPa longitudinal stress (transverse stress is negligible). (a) What is the output voltage (V2 – V1) of the Wheatstone bridge circuit? (b) What is the total power consumption of the Wheatstone bridge circuit?

Imagine you are riding on a yacht in the ocean and traveling at 20 mph. you then hit a golf ball at 100 mph from the deck of the yacht. you see the ball move away from you at 100mph, while a person standing on a near by beach would observe your golf ball traveling at 120 mph (20 mph + 100 mph). now imagine you are aboard the hermes spacecraft traveling at 0.1c (1/10 the speed of light) past mars and shine a laser from the front of the ship. you would see the light traveling at c (the speed of light) away from your ship. according to einstein’s special relativity, how fast will a person on mars observe the light to be traveling? a) 0.1c (1/10 the speed of light) b) c (the speed of light) c)1.1c (c+0.1c)

Which is special about a dc circuit ? a. it has both series and parallel components b. it has only series or only parallel components c. charge moves in a single direction d. charge moves back and forth quickly

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?