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In a hydraulic press, a force of 200 N is applied to master piston of area of 25cm-2. If the press is designed to produce a force of 5000N, determinea:the area of the slave pistonb:the radius of the slave piston
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Samples of different materials, A and B, have the same mass, but the sample of A is higher in density. Which statement could explain why this is so?A. The particles that make up material A have more mass than the particles that make up material B B. The particles that make up material B have more mass than the particles that make up material A. C. The particles that make up material B are more closely packed together than the particles that make up material A. D. The sample of material A has greater volume than the sample of material B.It's A
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a 13kg block is at rest on a level floor. A 400 g glob of putty is thrown at the block so that the putty travels horizontally, hits the block, at sticks to it. The block and putty slide 15cm along the floor. if the coefficient of sliding friction is 0.4, what is the initial speed of the putty
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Which of the following is a correct relationship between linear displacement and angular displacement?
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Two horizontal metal plates, each 10.0 cm square, are aligned 1.00 cm apart with one above the other. They are given equal-magnitude charges of opposite sign so that a uniform downward electric field of 2.02*10^3 N/C exists in the region between them. A particle of mass 2.00*10^16kg and with a positive charge of 1.03*10^6 C leaves the center of the bottom negative plate with an initial speed of 1.02*10^5 m/s at an angle of 37.0 above the horizontal.(a) Describe the trajectory of the particle.a parabolaa circle a helixa straight lineYour answer is correct.(b) Which plate does it strike?negative platepositive plate It does not strike either plate.Your answer is correct.(c) Where does it strike, relative to its starting point? (Enter the horizontal distance from the initial position.)= m.
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Different satellites orbit the earth with a vast range of altitudes, from just a couple hundred km, all the way to tens of thousands of km above the surface. The international space station (ISS) is in a low earth orbit, just 400km above the surface (you can see it with the naked eye at sunset and sunrise as a bright, moving dot). At this altitude, the acceleration due to gravity has a value of 8.69m/s Assuming that the radius of the earth is 6400km). 1. What is the speed of the ISS? Express your answer to three significant figures and include the appropriate units. 2. What is the orbital period (T) of the ISS in minutes?
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Car batteries are often rated in amp-hours. This rating indicates the quantity of charge that can pass through the battery before the battery's chemical energy must be restored by the car's generator or some other source. The amp-hour unit is convenient for simple calculations. For example, a 60-amp-hour battery can supply a current of 1.0 A for 60 h (or 60 A for 1.0 h) before going dead. Find the energy stored in the following.(a) a 58 A-h, 10 V car battery(b) a 1.3 A-h, 1.7 V flashlight battery
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Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (a) If a sample of gold with a mass of 1.915 g, is pressed into a leaf of 7.331 m thickness, what is the area of the leaf? (b) If, instead, the gold is drawn out into a cylindrical fiber of radius 2.100 m, what is the length of the fiber?
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A car has a crumple zone that is 0.80 m (80 cm) long. In this car, the distance from the dummy to the steering wheel is 0.50 m. The car has a mass of 1,600 kg and the dummy has a mass of 75 kg. At the time of the crash, the car has a speed of 18 m/s. Based on the work-energy theorem, what is the smallest possible force that the dummy could experience during the crash
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Two metal spheres that are initially uncharged are mounted on insulating stands. A negatively charged rubber rod is brought close to, but does not make contact with sphere X. Sphere Y is then brought close to X on the side opposite to the rubber rod. Y is allowed to touch X and then is removed some distance away. The rubber rod is them moved far away from X and Y. What are the final charges on the spheres
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A marching band consists of rows of musicians walking in straight, even lines. When a marching band performs in an event, such as a parade, and must round a curve in the road, the musician on the outside of the curve must walk around the curve in the same amount of time as the musician on the inside of the curve. This motion can be approximated by a disk rotating at a constant rate about an axis perpendicular to its plane. In this case, the axis of rotation is at the inside of the curve.Knowing that If Beth travels a distance s during time t, how far does Alf travel during the same amount of time= (1/4)s. If Alf moves with speed v, what is Beth's speed? Speed in this case means the magnitude of the linear velocity, not the magnitude of the angular velocity.a. 4v b. v c. v/4
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A cylinder with initial volume V contains a sample of gas at pressure p. On one end of the cylinder, a piston is let free to move so that the gas slowly expands in such a way that its pressure is directly proportional to its volume. After the gas reaches the volume 3V and pressure 3p, the piston is pushed in so that the gas is compressed isobarically to its original volume V. The gas is then cooled isochorically until it returns to the original volume and pressure. Find the work W done on the gas during the entire process. Find the amount of work W done on the gas during the entire process. Express your answer in terms of some or all of the variables p and V.
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Coulomb's law for the magnitude of the force FFF between two particles with charges QQQ and QQQ^\prime separated by a distance ddd is|F|=K|QQ|d2|F|=K|QQ|d2,where K=140K=140, and 0=8.8541012C2/(Nm2)0=8.8541012C2/(Nm2) is the permittivity of free space.Consider two point charges located on the x axis: one charge, q1q1q_1 = -11.5 nCnC , is located at x1x1x_1 = -1.675 mm ; the second charge, q2q2q_2 = 40.0 nCnC , is at the origin (x=0.0000)(x=0.0000).What is the force exerted by these two charges on a third charge q3q3q_3 = 48.0 nCnC placed between q1q1q_1 and q2q2q_2 at x3x3x_3 = -1.215 mm ?Your answer may be positive or negative, depending on the direction of the force.Express your answer numerically in newtons to three significant figures.
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A toy spacecraft is launched directly upward. When the toy reaches its highest point, a spring is released and the toy splits into two parts with masses of 0.02 kg and 0.08 kg, respectively. Immediately after the separation, the 0.02 kg part moves horizontally due east. Air resistance is negligible. True statements about the 0.08 kg part include which of the following? i. It could move north immediately after the spring is released. II. It takes longer to reach the ground than does the 0.02 kg part. III. It strikes the ground farther from the launch point than does the 0.02 kg part. A) None B) I only C) Ill only D) I and II only E) II and III only
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A prismatic bar AB of length L and solid circular cross section (diameter d) is loaded by a distributed torque of constant intensity t per unit distance .(a) Determine the maximum shear stress tmax in the bar(b) Determine the angle of twist between the ends of the bar.
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elect all of the following that correctly describe what a voltmeter and ammeter measure. Select all that apply: A voltmeter measures the potential difference (or voltage) across a circuit element. A voltmeter measures the potential difference (or voltage) passing through a circuit element. An ammeter measures the electric current passing through a circuit element. An ammeter measures the electric current across a circuit element.
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An electric vehicle starts from rest and accelerates at a rate of 2.0 m/s2 in a straight line until it reaches a speed of 21 m/s. The vehicle then slows at a constant rate of 1.1 m/s2 until it stops. (a) How much time elapses from start to stop? (b) How far does the vehicle move from start to stop?
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You are standing on a street corner with your friend. You then travel 14.0 m due west across the street and into your apartment building. You travel in the elevator 22.0 m upward to your floor, walk 12.0 m north to the door of your apartment, and then walk 6.0 m due east to your balcony that overlooks the street. Your friend is standing where you left her.Now how far are you from your friend?Express your answer with the appropriate units.
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If u have a box with mass of 10kg and u push with a force of 200 N what is the acceleration of the box ?
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A commuter train passes a passenger platform at a constant speed of 39.6 m/s. The train horn is sounded at its characteristic frequency of 346 Hz. (a) What overall change in frequency is detected by a person on the platform as the train moves from approaching to receding
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Calculate the x-component of the electric field at point P due to charge Q1. Write your answer in units of N/C.
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An electrically charged point particle with a mass of 1.41 x 10-6 kg is launched horizontally into a uniform electric field with a magnitude of 686 N/C. The particle's initial velocity is 5.39 m/s, directed eastward, and the external electric field is also directed eastward. A short time after being launched, the particle is 9.89 x 10-3 m below and 0.151 m east of its initial position. Determine the net charge carried by the particle, including the algebraic sign ( or -).
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A satellite will travel indefinitely in a circular orbit around the earth if the normal component of its acceleration is equal to 2 gRr ( /), where 2 g =9.81 m/s , R = radius of the earth = 6370 km, and r = distance from the center of the earth to the satellite. Assuming that the orbit of the moon is a circle of radius 3 384 10 km, determine the speed of the moon relative to the earth.
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the need for sustainable energy resources ??
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