Physics

list the 8 types of waves found on the electromagnetic spectrum from longest to shortest wavelength.
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Why does magnesium bromide have a 2?
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The greater efficiency achieved with the curved blades of a pelton wheel is due to
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a ball is swung in a vertical circle such that at one point along its circular path the forces exerted on the ball can be represented by the free body diagram. the magnitude of the tension force exerted on the ball, t, is twice that of the force due to gravity exerted on the ball from earth, fg. what is the location of the ball, and what is the magnitude of the centripetal acceleration of the ball?
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a block of mass m is launched by a spring of negligible mass along a horizontal surface of negligible friction. the spring constant of the spring is k. the spring is initially compressed a distance x0. the block is released from rest. some time after the block is released and travels in the direction shown in the figure, the spring compression is xf. which of the following mathematical calculations can a student use to determine the speed vf of the block at this new position?
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Q5. A cyclist travels down a hill from rest at point X, without pedalling. He applies his brakes and the cycle stops at point Y. Which energy changes have taken place between X and Y? A) kinetic energy-> heat energy-> gravitational potential energy. B) gravitational potential energy -> heat energy-> kinetic energy. C) kinetic energy-> gravitational potential energy-> heat energy. D) gravitational potential energy-> kinetic energy-> heat energy.
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Suppoe that the electric field part of an electromagnetic wave in vacuum i 5 E-3. 1 Co (18 5. 4x101) (a) What i the direction of propagation? (b) What i the wavelength ?(c) What i the frequency?(d) What i the amplitude of the magnetic field part of the wave? (e) Write an expreion for the magnetic field part of the wave
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if an object is placed beyond the the focal length of a converging lens (s>f) the image will be
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What is required to start an object moving?
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alex thinks 131 degrees are neat. what is the maximum number of interior angles of a convex n-gon that can measure 131 degrees?
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What is the relationship between wavelength and frequency Mcq?
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How much does CO2 contribute to global warming?
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if you could see stars during the day, the drawing above shows what the sky would look like at noon on a given day. the sun is at the highest point that it will reach on this day and is near the stars of the constellation gemini. what is the name of the constellation that will be closest to the sun at sunset on this day?
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Object A of mass 2 kg is gravitationally attracted to object B of mass 2 kg as the two objects float in space. Frictional forces are negligible. The gravitational forces of attraction between the two objects are shown in the table above. Which of these claims about the motion of the center of mass of the two objects system is true?A) The center of mass will not accelerate B) The center of mass will accelerate at 0.675 x 10 m/s? C) The center of mass will accelerate at 5.4 x 10 m/sD) The center of mass will accelerate at 2.7 x 10 m/s
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2. A rifle can shoot a 4.00 g bullet at a speed of 998 m/s.a. Find the kinetic energy of the bullet.b. What work is done on the bullet if it starts from rest?c. If the work is done over a distance of 0.75 m, what is the averageforce on the bullet?d. If the bullet comes to rest after penetrating 1.50 cm into a piece ofmetal, what is the magnitude of the force bringing it to rest?Posted Thu Oct 27, 2022 at 9:11 am
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A student conducts three experiments to determine how certain quantities influence the centripetal force responsible for an object to spin in a horizontal circle. The student uses one end of a string to attach the object while the other end is connected to a force sensor that allows the student to change the tension on the string, as shown in the figure. The student records data from the three experiments in the table above. Which of the following experiments, if any, collected data that do not agree with the expression for the net centripetal force on the object? A)The experiment in which mass was changed B)The experiment in which the radius of the circular path was changed C)The experiment in which the speed of the object was changed D)All the data are expected.
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part a the focal length of david's lens is 40 cm. if rebecca stands in front of david at a distance of do and david perceives the position of rebecca at di, what does do equal if the magnification is -0.45? express your answer with the appropriate units. follow the sign convention. templatessymbols undoredoresetkeyboard shortcutshelp do
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After the core of a massive star becomes a neutron star, the rest of the stars materiala. Continues regular fusion and returns to the main sequenceb. Is vaporized by the incredible heat of the dying star and is ejected outwardc. Falls inward and gets compressed to incredible densities.d. Makes a planetary nebula, which gently moves outward from the center
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a wooden block of mass 1200g, which moves on a horizontal surface, is subjected to a frictional force of 3 N. How much frictional force will act on the block if we put a 500g weight on it?
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An object is located 50.0cm from a converging lens having a focal length of 15.0cm. Which of the following statements is true regarding the image formed by the lens?A. It is virtual, upright, and larger than the objectB. It is real, inverted, and smaller than the object.C. It is virtual, inverted, and smaller than the object.D. It is real, inverted, and larger than the object.
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a 700 kg elevator starts from rest. it moves upward for 2.50 s with constant acceleration until it reaches its cruising speed, 1.75 m/s. (a) what is the average power of the elevator motor during this period? correct: your answer is correct. w (b) how does this power compare with the motor power when the elevator moves at its cruising speed? pcruising
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What happens to waves when they pass through a narrow opening?
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What are some of the safety procedures to follow when refueling?
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What happens during 1/2 life of a radioactive isotope?
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