Physics

The uniform slender bar of mass m and length l is released from rest in the vertical position and pivots on its square end about the corner at O. (a) If the bar is observed to slip when 30 , find the coefficient of static friction s between the bar and the corner. (b)If the end of the bar is notched so that it cannot slip, find the angle at which contact between the bar and the corner ceases.
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Which of the following atoms is considered neutral? An atom with 7 protons, 7 neutrons & 8 electrons An atom with 3 protons, 3 neutrons & 7 electrons An atom with 3 protons, 4 neutrons & 3 electrons An atom with 3 protons, 3 neutrons & 4 electrons
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Only refer from the community conservation article please. Will mark brainliest!!!!1. Summarize the scientific information that leads to conservation in each of the articles. 2. What social issues affected the problem or its solution in each of the stories? 3. How did economics delay scientists' first attempts for conservation in each story? 4. Describe the political actions that led to successful conservation in both stories.
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What happens to inertia as you increase the mass?
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Who is having a hallucination?OA. Dominique, who doesn't know who she is anymoreOB. Jasmine, who believes that she is a millionaire and is really aprincessOC. Damion, who suffers a concussion after a football game and hasmemory problemsOD. Terrance, who suffers from schizophrenia and sees faces lookingat him in the wall
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In a nuclear fusion reaction, the mass of the products is _____ the mass of the reactants.
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Chuck's car is moving at 65.0m/s when he suddenly accelerates his car at 15.0m/s2 for 3.00s. How far did Chuck, and his car, travel while he was accelerating?
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Under electrostatic conditions, the electric field just outside the surface of any charged conductorA. is always zero because the electric field is zero inside conductorsB. can have non zero components perpendicular to and parallel to the surface of the conductorC. is always perpendicular to the surface of the conductorD. is always parallel to the surfaceE. is perpendicular to the surface of the conductor only if it is a sphere, a cylinder, or a flat sheet.
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Why aren't the right-hand rules used to figure out the force exerted on particles traveling parallel to a magnetic field?
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When a feather and coin are dropped towards the surface of the earth , do they reach ground together
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Becky has a shower and uses 20,000g of water with a specific heat capacity of 4200J/KG. When the water is supplied with 336,000J of energy, it heats up to 50^c. What is the startig temperature of the water?
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A hockey puck moving at 28 m/s is caught by an 80,00 kg man who was atrest. The man and puck move together after the collision. The pucks mass is0.16 kg. What is the final velocity?A. 0.06 m/sB. 4.5 m/sC. 1.36 m/sD. 8 m/s
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Terry can ride 30 miles in 2 hours. If his riding speed isreduced by 3 mph (mile/hour), how far can he ride in 1.7 hours?miles
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Which of the following statements are characteristics of magnetic fields? Select all that apply.Magnetic fields point from the north pole to the south pole of a magnet.The earth's magnetic field has no effect on the electron rays coming from the sun.An example of the Biot-Savart law is the effect of the earth's maghytic field on the electron rays coming from the sun.The north pole of a magnet will be attracted to the south pole of the earth.If a bar magnet is cut in half two magnets with like poles will be created.
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Which factors affect the speed of ocean waves?
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When the motion energy of an object changes, there is inevitably some other change in energy at the same time. If an object is slowing down, where is the energy going? (Check all that apply)Question 9 options:The potential energy could be increasing, like a ball thrown into the air.The kinetic energy could be lost to friction or air resistance.The ball could be returning to its natural resting state.Due to the conservation of energy, the kinetic energy must stay the same.
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in the figure calculates the acceleration of the block friction not today
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Animals have different types of respiratory systems depending on the environment of their habitat. Fish live in the water and use gills to breathe. Humans who live on land, breathe air through their lungs. Identify the similarities between lungs and gills.
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An object has a mass of 5 kg. What force is needed to accelerate it at 6 m/s?
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A car takes 15 minutes to travel along a road that is 20 km long.What is the average speed of the car?A. 75 km/h B. 5.0 km/h C. 80 km/h D. 300 km/h
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An energy-efficient electric fan converts a large portion of the electrical energy that enters it into __________.A. Sound energy in the fan's motorB. Kinetic energy of the fan bladesC. Thermal energy in the fan's motorD. An unwanted form of energy
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A small object begins a free-fall from a height of =81.5 m at 0=0 s . After =2.20 s , a second small object is launched vertically up from the ground with an initial velocity of 0=40.0 m/s . At what height from the ground will the two objects first meet?
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Pretend you are explaining to a friend an object's energy can change depending on the position of the object. Use details from the text to help you write your conversation below.The text is the pictureI WILL MARK YOU AS BRAINLIEST
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What is (9x10^9)(2.6x10^-6)(1.4x10^-6) / 36
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