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Two children with masses of 23 and 41 kg are sitting on a balanced seesaw. If the lighter child is sitting 3 m from the center, where is the heavier child sitting from the center?
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Question: Positive point charges q = 7.00uC and q'= 4.00uC are moving relative to an observer at point P, as shown in the figure (Figure 1). The distance d is 0.130m , v = 4.60 x 10^6 m/s , and v'= 9.20 x 10^6 m/s Part A ...
Question: A projectile is fired from ground level at time t=0, atan angleθ with respect to the horizontal. It has an initialspeed v0 . In this problem we are assuming that the ground islevel. Part A Find the time tH it ...
Question: A rock thrown with speed 12.0m/s and launch angle 30.0 degrees (above the horizontal) travels a horizontal distance of d = 15.5m before hitting the ground. From what height was the rock thrown? Use the value g ...
Question: A researcher observes hydrogen emitting photons of energy 1.13eV . What are the quantum numbers of the two states involved in the transition that emits these photons? Express your answers as integers separated ...
Near the Earth's surface, a compact car of total mass M is driven on a large, revolving, horizontal, disk-shaped platform which itself rotates about its center at a fixed angular frequency ω. At t = 0, the driver leaves ...
A projectile is launched at an angle of 13.0° above the horizontal. What is its initial speed if it hits a target that is located a horizontal distance of 155 m from the launch point and 10.5 m below the launch level?
After examining a cube-shaped object, explain, based on your observations, why Earth is not shaped like a cube? Describe 4 reasons with evidence to support each one.
Question: Suppose that two stars in a binary star system are separated by a distance of 90 million kilometers and are located at a distance of 180 light-years from Earth. Part A What is the angular separation of the two ...
Question: Pluto moves in a fairly elliptical orbit around the sun. Pluto's speed at its closest approach of 4.43 *10^9 km is 6.12 km/s. What is Pluto's speed at the most distant point in its orbit, where it is 7.30 *10^9 ...
An unfortunate astronaut loses his grip during a spacewalk and finds himself floating away from the space station, carrying only a rope and a bag of tools. First he tries to throw a rope to his fellow astronaut, but the ...
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