A drowsy cat spots a flowerpot that sails first up and then down past an open window. The pot is in view for a total of 0.66 s, and the top-to-bottom height of the window is 1.80 m. How high above the window top does the flowerpot go? (Assume that in both sailing upward and then falling downward, the flowerpot is seen to span the full vertical height of the window.)
Answers
Answer:
Height covered after crossing window top = 0.75 m
Explanation:
In the question,
The height of the window pane = 1.8 m
Time for which the flowerpot is in view = 0.66 s
So,
The time for which it was in view while going up is = 0.33 s
Time for which it was in view while going down = 0.33 s
So,
Let us say,
The initial velocity of the flowerpot = u m/s
So,
Using the equation of the motion,
So,
Velocity at the top of the window pane is given by,
Now,
Let us say the height to which the flowerpot goes after crossing the window pane is = h
So,
Using the equation of motion,
Therefore, the height covered by the flowerpot after window is = 0.75 m
Related Questions
Heated air rises, cools, then falls. Air near the heater is replaced by cooler air, and the cycle repeats. A) Conduction B) Convection C) Radiation
Which of the following best describes the magnetic field lines around an isolated, permanent bar magnet?A. The field lines go from the magnet's south pole into its north pole.B. The field points out along radial lines from the bar magnet, extending straight out to infinity.C. The field lines go from the magnet's north pole into its south pole.D. The field points straight into the bar magnet along radial lines that extend to infinity.
A steel block has a volume of 0.08 m³ and a density of 7,840 kg/m³. What is the force of gravity actingon the block (the weight) in water? A. 5,362.56 N B. 7,600.18 N C. 6,700.56 N D. 6,150.64 N
A boat sails along the shore. To an observer, the boat appears to move at a speed of 11 m/s, and a man on the boat walking forward appears to have a speed of 12.4 m/s. How long does it take the man to move 6 m relative to the boat?
Answers
Answer:
49 m/s
Explanation:
Initial potential energy = final kinetic energy
PE = KE
mgh = ½ mv²
v = √(2gh)
v = √(2 × 10 m/s² × 120 m)
v = 49 m/s
Answers
The skier's acceleration is 4 meter per square seconds in south direction.
What is acceleration?
Acceleration is the rate at which speed and direction of velocity vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates.
Even if the speed is constant, motion on a circle accelerates because the direction is always shifting. Both effects contribute to the acceleration for all other motions.
Acceleration is a vector quantity since it has both a magnitude and a direction.
The skier's acceleration is = change in velocity ÷ time interval
= ( final velocity - initial velocity) ÷ time interval
= (0 m/s - 12 m/s) ÷ 3 seconds
= - 4 meter per square seconds.
Hence, the skier's acceleration is 4 meter per square seconds in south direction.
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Answer:
A skier reaches the bottom of a slope with a velocity of 12 meters per second north. If the skier comes to a complete stop in 3 seconds. A. 36 m/s (squared) north
Explanation:
Answers
Final answer:
The sum of two vectors A and B is a resultant vector R, where R = A + B. If vectors A and B are plotted with their tails at the origin and heads at points (x1, y1) and (x2, y2), respectively, the resultant vector R ends at point (x1+x2, y1+y2). This represents the sum of the individual components of vectors A and B.
Explanation:
In vector addition, the equation for the sum of two vectors A and B can be generally represented as R = A + B, where R is the resultant vector. If the vectors are plotted with their tails at the origin and their heads ending at points (x1, y1) for Vector A and (x2, y2) for Vector B, the resultant vector, R, will end at the point (x1+x2, y1+y2). In other words, the components of the resultant vector are simply the sum of the components of the original vectors.
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Answer:
R=-x-4y
Explanation:
Because i said so
Answers
71 W = (120 V) · (current)
Divide each side by (120 V) :
Current = (71 W) / (120 V) = 0.59167 Amperes
What I want to know is: Where can I buy a 71-W light bulb ?
B. exothermic
C. isothermic
D. endothermic
E. all of the above
Answers
Answer : The correct option is, (D) Endothermic
Explanation :
Adiabatic : It is a process in which a heat is constant. That means no heat is lost or gained by the system.
Isothermic : It is a process in which a temperature is constant.
Exothermic : It is a process in which heat released from system to surrounding. In this process, surrounding temperature increases and system temperature decreases.
Endothermic : It is a process in which heat required from the surrounding. In this process, surrounding temperature decreases and system temperature increases.
When the temperature of water increases from room temperature to 90ºC the process of heating the water is endothermic.
Hence, the correct option is, (D) Endothermic
b. the north end of Earth’s axis is tilted away from the sun.
c. the north end of Earth’s axis is tilted toward the sun.
d. Earth’s axis is parallel to the sun’s rays.
Answers
Answer: The correct answer is Option a.
Explanation:
An equinox is defined as an event that occurs when Sun's rays fall on the equator at noon and at an angle of 90°.
The axis of rotation of Earth must be perpendicular to the Sun's rays for this event to occur.
If the axis is titled to some angle even, then equinox will not occur.
Hence, the correct answer is Option a.