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A juggler throws a ball straight up into the air and it takes 3 seconds to reach its peak. Determine how many seconds will it take after that to fall back into his hand? Suppose he throws and catches the ball at the similar height.
Two blocks of masses 20 kg and 8.0 kg are connected togetherby a light string and rest on a frictionless level surface, what is the tension in the second string attached to the 8-kg mass
A 4.5kg ball with a velocity of 4.0m/s in the+x-direction collides head-on elastically with a stationary 1.8kg ball. What is the speed of the first ball after the collision
If it takes light 8 ns to travel 1.655 m in an optical cable, what is the index of refraction of the cable
A cart on a linear track has a uniform acceleration of 0.172m/s2. What is the velocity of the cart 4.00 s after it is released from rest?
the man and the platform together weigh 1200 N. The pulley can be modeled as frictionless. Elucidate how hard the man has to pull on the rope to lift himself steadily upward above the ground.
At 12 breaths/min, on a dry day when the inhaled air has almost no water content, what is the body's rate of energy loss (in J/s) due to exhaled water
A certain lightbulb is rated at 75.0 W when operating at an rms voltage of 120 V. What is the resistance of the bulb
Suppose you have a spherical balloon filled with air at room temperature and 1.0 atm pressure; its radius is 18cm. what's the balloon's new radius
A rock climber throws a small first aid kit to another climber who is higher up the mountain. FIND the vertical height difference between the two climbers
You are told that the linear "drag coefficient" due to air resistance for a particular object is 0.32 N · s/m, Find the magnitude of the terminal velocity of this object when dropped from rest
a block weighing 72.5 n rests on a plane inclined at 25.0deg to the horizontal. a force f is applied to the object at
At the surface of the Earth, the Sun delivers an estimated 1.43 kW/m2 of energy. Suppose sunlight hits a 16.3 m by 33.3 m roof at an angle of 90.0°. Estimate the total power incident on the roof
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