Physics

two children are throwing a ball back-and-forth straight across the back seat of a car. the ball is being thrown 10 mph relative to the car, and the car is travelling 40 mph down the road. if one child doesn't catch the ball and it flies out the window, in what direction does the ball fly (ignoring wind resistance)?
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Three equally charged spheres are placed as shown below. A force of 6.0 10 N acts between spheres X and Y. The charges on the spheres have the same sign. Calculate the net force acting on sphere Y.
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what physical quantities are conserved in this collision? the magnitude of the momentum only the net momentum (considered as a vector) only the momentum of each object considered individually
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he angular speed of a propeller on a boat increases with constant acceleration from 11 rad>s to 39 rad>s in 3.0 revolutions. what is the angular acceleration of the propeller?
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a cd has a diameter of 12.0 cm. if the cd is rotating at a constant angular speed of 20 radians per second, then the linear speed of a point on the circumference is
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according to faraday's law, a coil in a strong magnetic field must have a greater induced emf in it than a coil in a weak magnetic field. True/False?
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water enters the ground floor of a residential apartment building, flowing slowly into a wide pipe at high pressure. the water then rises and exits at high speed through a narrow pipe in a bathroom 3 stories above the ground floor. explain the factors that account for the lower pressure in the bathroom pipe.
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A roller coaster is deisgned so that a car goes through a circulat loop with a radius of 20m at a constant speed. That speed is set so that riders feel no push from the seat when they are at the top of the loop - that is, the acceleration due to gravity is exactly enough to keep the riders moving in a circle. What is the speed of the car?At the bottom of the loop, the seat will push up on the rider both to match the weight of the rider and to provide the acceleration which will turn the rider around in a circle. What acceleration does the rider feel from the seat? (Hint: combine acceleration due to gravity and the centripetal acceleration)
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i left a light on,and it worn down the battery jump start a car, and then have no instrument light, and no turn signals?
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two soccer players start from rest, 30 m apart. they run directly toward each other, both players accelerating. the first player's acceleration has a magnitude of 0.43 m/5?. the second player's acceleration has a magnitude of 0.42 m/2. (a) how much time passes before the players collide? (b) at the instant they collide, how far has the first player run?
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which of the following wavelengths are used in eye safe lidar systems? group of answer choices 530 - 540 nm 760 - 780 nm 1040 to 1060 nm 2040 - 2050 nm none of the above
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Part apart complete: What must be the high temperature if the Carnot efficiency is to be 30%? Express your answer using two significant figures. A. 303 K B. 513 K C. 330 K D. 570 K
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a neutron star of mass 2 10 30 kg and radius 11.1 km rotates with a period of 0.017 seconds. what is its rotational kinetic energy?
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When the reflection of an object is seen in a flat mirror, the image is a) real and upright b) real and inverted c) virtual and upright d) virtual and inverted
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a particle of kinetic energy 50 ev in free space travels into a region with a potential well of depth 40 ev. what happens to its wavelength?
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Man I hate Albert.io:A CD initially rotating at 23 rad/sec slows to a stop as it rotates through 3 rotations. What is the magnitude of its angular acceleration?Can I see how you did it too please?Answers:A.-1.2rad/s^2B.-3.8rad/s^2C.-14rad/s^2D.-88rad/s^2
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.In a Michelson interferometer, in order to shift the pattern by half a fringe, one of the mirrors at the end of an arm must be moved bySelect answer from the options belowIt depends on which mirror is moved.It depends on the wavelength.one-quarter wavelength.half a wavelength.one wavelength.
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when cleared to cross any runway or taxiway, you must also: choose the correct answer below: a.contact airfield managementb.conduct a fod check c.none of the answers d.visually check for any aircraft traffic
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You send coherent 550 nm light through a diffraction grating that has slits of equal widths and constant separation between adjacent slits. You expect to see the fourth-order interference maximum at an angle of 66.6 with respect to the normal to the grating. However, that order is missing because 66.6 is also the angle for the third diffraction minimum (as measured from the central diffraction maximum) for each slit. a. Find the center-to-center distance between adjacent slits. b. Find the number of slits per mm. c. Find the width of each slit.
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A tow truck is pulling a car out of a ditch. Which of the following statements is true about the forces between the truck and the car?(A) The force of the truck on the car is greater than the force of the car on the truck.(B) The force of the truck on the car is less than the force of the car on the truck.(C) The force of the truck on the car is equal in magnitude to the force of the car on the truck.(D) The force of the truck on the car may be equal to the force of the car on the truck, but only when the system is in astate of constant velocity.(E) The force of the truck on the car may be greater than the force of the car on the truck, but only when the system isaccelerating.
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Learning Goal: To understand standing waves including calculation of lambda and f, and to learn the physical meaning behind some musical terms. The columns in the figure (Figure 1) show the instantaneous shape of a vibrating guitar string drawn every 1 ms. The guitar string is 60 cm long. The left column shows the guitar string shape as a sinusoidal traveling wave passes through it. Notice that the shape is sinusoidal at all times and specific features, such as the crest indicated with the arrow, travel along the string to the right at a constant speed. The right column shows snapshots of the sinusoidal standing wave formed when this sinusoidal traveling wave passes through an identically shaped wave moving in the opposite direction on the same guitar string. The string is momentarily flat when the underlying traveling waves are exactly out of phase. The shape is sinusoidal with twice the original amplitude when the underlying waves are momentarily in phase. This pattern is called a standing wave because no wave features travel down the length of the string. This figure(figure 3) shows the first three standing wave patterns that fit on any string with length L tied down at both ends A pattern's number r wavelength of the nth pattern is denoted lambda_u. The nth pattern has n half-wavelengths along the length of the string, so n lambda_n/2 = L. Thus the wavelength of the nth pattern is lambda_n = 2L/n Part B What is the wavelength of the longest wavelength standing wave pattern that can fit on this guitar string"? Express your answer in centimeters. 1ambda_1 _______ cm
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One wishes to use neutrons to resolve two objects. The neutrons areemitted from the separate objects with a speed of v = 2.1 x103 m/s and pass through a circular opening withdiameter d = 0.06 mm. According to the Rayleigh criterion, whatmust be the minimum angle between the two objects?
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an electron is accelerated by a potential difference of 1.5mv (1.5106 volts). what is the momentum of the electron?
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The position of a 50 g oscillating mass is given by x(t)=(2.0cm)cos(10t/4), where t is in s. If necessary, round your answers to three significant figures. Determine:a) amplitude _____ cmb) the period ______sc) the spring constant _____ N/md) the phase constant ______ rade) the initial coordinate of the mass ______ cmf) the initial velocity ________ cm/sg) the maximum speed ________ cm/sh) the total energy _________ mJi) the velocity at t=0.40 s __________ cm/s
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