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i have like an hour and a half to answer these
a passenger in the rear seat of a car moving at a steady speed is at rest relative to
a. a car coming from the opposite direction.
b. the front seat of the car.
c. a pedestrian on the corner ahead.
d. the side of the road.
a river current has a velocity of 10 km/h relative to the shore, and a boat moves in the same direction as the current at 10 km/h relative to the river. how can the velocity of the boat relative to the shore be calculated?
a. by adding the vectors
b. by multiplying the vectors
c. by subtracting the river current vector from the boat’s velocity vector
d. by dividing the river current vector by the boat’s velocity vector
a horizontal line on a distance-time graph means the object is
a. slowing down.
b. moving faster.
c. at rest.
d. moving at a constant speed.
a motorcycle travels 850 meters in 14 seconds. what is its average speed?
speed is the ratio of the distance an object moves to
a. the motion of the object.
b. the amount of time needed to travel the distance.
c. the direction the object moves.
d. the displacement of the object.
a train travels 62 kilometers in 4 hours, and then 93 kilometers in 5 hours. what is its average speed?
Answers: 3
Physics, 21.06.2019 17:30
The particles of an ice cube at 0°c (represented by the blue circles) come in contact with the particles of juan’s hand at 37°c (represented by the orange circles). which diagram correctly represents the temperature of the two substances and the direction of heat flow?
Answers: 3
Physics, 21.06.2019 18:10
Awheelhas a radius of 4.8 m. howfar (path length) does a point on the circumference travel if thewheel is rotated through angles of 30°, 30 rad, and 30 rev,respectively?
Answers: 3
Physics, 22.06.2019 18:50
An insulated thermos contains 148 g of water at 72.7 ˚c. you put in a 11.7 g ice cube at 0.00 ˚c to form a system of ice + original water. the specific heat of liquid water is 4190 j/kg•k; and the heat of fusion of water is 333 kj/kg. what is the net entropy change of the system from then until the system reaches the final (equilibrium) temperature?
Answers: 2
Needed asap
i have like an hour and a half to answer these
a passenger in the rear...
i have like an hour and a half to answer these
a passenger in the rear...
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