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A man tosses a coin straight up to 2.5 meter. Assume the height when the coin leaves his hand is 1.4 meter. Find what was the initial speed of the coin when it left his hand?
m/s
A long string is moved up and down with simple harmonic motion with a frequency of 46 Hz. The string is 579 m long and has a total mass of 46.3 kg. Determine the velocity of the wave on the string
A spherical balloon is made from a material whose mass is 3.86 kg. The thickness of the material is negligible compared to the 2.16-m radius of the balloon. Find the absolute pressure of the helium gas
In an experiment designed to measure the speed of light, a laser isaimed at a mirror that is 59.0 km due north. A detector is placed138 m due east of the laser. The mirror is to be aligned so that light from the laser refelects into the detector.
Besides the gravitational force, a 3.25-kg object is subjected to one other constant force. The object starts from rest and in 1.20 s experiences a displacement of (4.10 - 3.30) m, where the direction of is the upward vertical direction. find out ..
Spiderman's webbing has a cross sectional area of A = 10^-6 m^2. The Young's modulus of the silk is Y = 200 x 10^10 Pa, and has a breaking strength of 1 x 10^9 Pa. Assume Spiderman, of mass m = 80 kg, is swinging along the end of a web-rope of length
A 2.67 ? resistor, a 5.52 ? resistor, and a 8.10 ? resistor are connected in series with a 24.0 V battery. What is the equivalent resistance? What is the current in each resistor?
A ball of mass 15.49 kg rests on a table of height 0.72 m. The tabletop is a rectangular glass plate of mass 12.13 kg, what is the force that the tabletop exerts on each leg
A 134g baseball moving 28.6 m/s strikes a stationary 5.20 kg brick resting on small rollers so it moves without significant friction. Find the total kinetic energy before the collision
unpolarized light with intensity io passes through two polarizers the transmission of the one is vertical and that of the other is 60 degrees to the vertical
Tim and Rick both can run at a constant speed Vr and walk at the constant speed Vw, (Vw
The planet Mars has a satellite, Phobos, which travels in an orbit of radius 9.378×106 m with a period of 0.32 days. Calculate the mass of Mars from this information
Light traveling in air enters a material at an angle of 25 degrees with respect to the normal. The refracted beam in the material makes an angle of 18 degrees with respect to the normal. Calculate the index of refraction of the material.
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