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A spaceship approaches the earth with a speed 0.50c. A passenger in the spaceship measures his heartbeat as 70 beats per minute. Determine what is his heartbeat rate according to an observer that is at rest relative to the earth?
a man is on a roof of height 50m and hurls a water balloon with a velocity of 15ms at an angle of 30 above the
A 1.00kg ball is at rest on the floor in a 2.10m * 2.10m * 2.10m room of air at STP. Air is 80% nitrogen (N2) and 20% oxygen (O2) by volume. What is the thermal energy of the air in the room
The image behind a convex mirror (radius of curvature = 76.0 cm) is located 32.0 cm from the mirror. Where is the object located (give the distance to the mirror)
A rifle is aimed horizontally at a target 55.0 m away. Thebullet hits the target 2.90 cmbelow the aim point. What was the bullet's flight time
A bag of potato chips contains 2.00 L of air when it is sealed at sea level at a pressure of 1.00 at m and a temperature of 20.0°C. What will be the volume of the air in the bag if you take it with you, still sealed, to a higher altitude where the te..
a proton moving with a velocity of 4.0times104 ms enters a magnetic field of 0.20 t. if the angle between the velocity
a single slit illuminated with a 500 nm light gives a diffraction pattern on a far screen. the 5th minimum occures at 7
A physics professor demonstrates the Doppler Effect with tying a 600. Hz sound generator to a 1.00 meter-long rope and whirling it around his head in a horizontal circle at 100. rpm. What are the highest and lowest frequencies heard by a student in t..
Suppose that the linear density of the A string on a violin is 8.50 10-4 kg/m, What is the tension in the string
A small ferryboat is 4.00 m wide and 6.00 m long. When a loaded truck pulls onto it, the boat sinks an additional 4.60 cm into the river
Suppose a manufacturing plant has an average sound intensity level of 97.0 dB created by 25 identical machines. Find the sound intensity created by one such machine
If an underwater vehicle were to explore such a depth, what force would the water exert on the vehicle's observation window (radius = 0.10 m)? For comparison, determine the weight of a jetliner whose mass is 1.20 105 kg
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