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Astronomers discover an exoplanet (a planet of a star other than the Sun) that has an orbital period of 3.35 Earth years in its circular orbit around its sun, which is a star with a measured mass of 3.29 × 1030 kg.
Find the radius of the exoplanet\'s orbit.
A kid fires water horizontally from a squirt gun held 1.6 above the ground. It hits other kid 2.4 away squares in the back, at a point 0.85 above the ground. What was the initial speed of the water.
An electron enters a region of space containing a uniform 0.0000179-T magnetic field. Its speed is 151 m/s, Find the radius r of the electron\'s path
A 6 m long 50 kg ladder leaning on a frictionless wall can successfully be scaled by a 120 kg man. What is the minimum angle between the ladder and the floor
A 60.0 g bullet is fired from a muzzle velocity of 525 m/s from a gun with mass 4.50 kg and a barrel length of 55.0 cm, Find the bullet's momentum as it leaves the barrel
Using a vernier caliper of least count 0.01 cm, the length of a cylinder is measured to be 3.76 cm, and its diameter 1.28 cm. Calculate the probable percent error in the volume
a positron is a particle with the same mass and magnitude charge as an electron, but a positron has a positive charge. what is the system's total kinetic energy
Two 2.50cm×2.50cm plates that form a parallel-plate capacitor are charged to ± 0.708nC, What is the potential difference across the capacitor
A vacuum cleaner is plugged into a 120.0-V socket and uses 2.4 A of current in normal operation, Find the coil resistance of the motor
A uniform, spherical cloud of interstellar gas has mass 2.0Ã-1030 kg and radius 9.0Ã-1012 m, what will be the star's rotation period
As part of a safety investigation, two 1400 cars travelling at 18 are crashed into different barriers. Find out the average forces exerted on (a) car that hits a line of water barrels and takes 1.8 to stop, and (b) car that hits a concrete barrier an..
A firefighter standing on a ladder 4.20 meters in the air is using a water hose to put out a fire. How much work is done per minute in lifting the water from the ground
The two spheres are then connected by a thin conducting wire, What is the charge on the first sphere after the two spheres are connected by the wire
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