1) A human cannonball is launched straight up from the top of 100- meter-high rampart at 400 m/s. How long is the cannoneer in the air above the rampart? Answer: 81.6 s
2) A cheerleader is thrown straight up from the ground with an initial velocity of 1.5 m/s. On the way down, she makes eye contact with a fan when she is 2.8m above the field. How much time passes between the initial throw and when they make eye contact? Answer: 1.05 s
3) You throw a basketball from the ground straight up in the air with an initial velocity of 12.2 m/s. On its way down, it passes through a hoop 3.05 m above the ground. How long does it take the ball to reach the ground after it passes through the hoop? Answer: 0.28 s
I included the answers but I don't know how to get it!
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A bathysphere used for deep-sea exploration has a radius of 1.52 m and a mass of 1.16 ✕ 104 kg. To dive, this submarine takes on mass in the form of sea water. Determine the amount of mass that the submarine must take on if it is to descend at a constant speed of 1.40 m/s, when the resistive force on it is 1101 N in the upward direction. The density of seawater is 1.03 ✕ 103 kg/m3.
Also, A horizontal pipe 20.00 cm in diameter has a smooth reduction to a pipe 10.00 cm in diameter. If the pressure of the water in the larger pipe is 7.50 104 Pa and the pressure in the smaller pipe is 6.00 104 Pa, at what rate does water flow through the pipes?
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what is centripetal acceleration please explain this concept
discuss the formulas that connect angular velocity to angular acceleration
give equations that involve centripetal acceleration and explain them
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Derive an expression for the minimum and maximum intensity when light reflects from a thin film
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A ball is projected at an angle of 53 degrees and a speed of 30m/s from the top of a cliff on Venus. The ball lands onto the flat, level ground below the cliff and 100m from the base of the cliff. how tall is the cliff? gravity on venus is equal to 8.87m/s^2
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1)
What is Fad,x, the x-component of the force exerted by the infinite wire on segment ad of the loop?2)
What is Fbc,x, the x-component of the force exerted by the infinite wire on segment bc of the loop?.3)
What is Fnet,y, the y-component of the net force exerted by the infinite wire on the loop?5)
What is the magnitude of I3In: Physics
Having a really hard time with this question!
To fit a contact lens to a patient's eye, a keratometer can be used to measure the curvature of the cornea-the front surface of the eye. This instrument places an illuminated object of known size at a known distance p from the cornea, which then reflects some light from the object, forming an image of it. The magnification M of the image is measured by using a small viewing telescope that allows a comparison of the image formed by the cornea with a second calibrated image projected into the field of view by a prism arrangement. Determine the radius of curvature of the cornea when p = 34.0 cm and M = 0.0200.
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A 195 g oscillator has a speed of 125.0 cm/s when its displacement is 2.30 cm and 71.0 cm/s when its displacement is 5.30 cm .
What is the oscillator's maximum speed?
Show work please.
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In the absence of air resistance, a projectile that lands at the elevation from which it was launched achieves maximum range when launched at a 45?angle. Suppose a projectile of mass m is launched with speed v0 into a headwind that exerts a constant, horizontal retarding force F? wind=?Fwindi^.
By what percentage is the maximum range of a 0.900 kg ball reduced if Fwind =0.600 N ?
Express your answer with the appropriate units.
*Answer cannot be 7.25 %, 6.8%, or 9% nor 6.3%
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A) Ball made of wood and ball made of aluminum, of the same radius are placed into reservoir with water. Aluminum ball after sinking rests at the bottom, wooden ball floats. Which ball experiences greater buoyancy force?
| a | Aluminum |
| b | Wooden |
| c | Buoyncy forces are the same |
| d | There is not enough information |
B) Water flows through a pipe with speed of 18 m/s. Pipe suddenly widens to 3 times of its initial diameter. The speed of water in broader part of a pipe is:
| a | 2 m/s |
| b | 6 m/s |
| c | 18 m/s |
| d | 54 m/s |
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1)What is The charge on 6 alpha particles?
2) Suppose the charge q2 in the figure can be moved left or right along the line connecting the charges q1 and q3. Given that q = +21
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A 60.0 kgkg skier on level snow coasts 183 mm to a stop from a speed of 1.70 m/sm/s .
a)Use the work-energy principle to find the coefficient of kinetic friction between the skis and the snow.
b)Suppose a 72.0 kgkg skier with twice the starting speed coasted the same distance before stopping. Find the coefficient of kinetic friction between that skier's skis and the snow.
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A linear quadrupole consists of charges q at z = a , z=-a and 2q at z = 0.
a) Show that the system is equivalent to two dipoles with dipole moment qa and -qa in the positions a/2 and -a/2.
b) Find the potential V(r, θ)
c) Draw the equipotential surfaces.
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