Physics

When a magnetic field is first turned on, the flux through a 20-turn loop varies with time according to m=5.0t22.0t, where m is in milliwebers, t is in seconds, and the loop is in the plane of the page with the unit normal pointing outward. (a) What is the emf induced in the loop as a function of time? What is the direction of the induced current at (b) t = 0, (c) 0.10, (d) 1.0, and (e) 2.0 s?
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A turntable, with a mass of 1.5 kg and diameter of 20 cm, rotates at 70 rpm on frictionless bearings. Two 540 g blocks fall from above, hit the turntable simultaneously at opposite ends of a diameter, and stick to it.Required:What is the turntable's angular speed, in rpm, just after this event?
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Which of the following is true of thethermocline layer of the ocean?A. rapidly decreases in temperatureB. warmest and least dense of the ocean layersC. is the bottom layer of the oceanD. is the top layer of the ocean
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PLEASE HELP!! I PROMISE I'LL GIVE BRAINLIEST!!What would your life look like if you had to use only analog signals?
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explain how an earthquake can occur, and briefly describe the forces involved and the effects they have on Earth's crust far from where the earthquake took place. think about how earthquake waves form and travel.
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Choose forces from the box to complete these sentences.
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Which of the following is NOT true aboutnewspaper weather maps?A. They report the temperature of the area in degreesFahrenheit.B. They let you know how much precipitation to expect.C. They provide more detail than weather service maps.D. They tell you about the warm and cold air fronts.
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7. An object can be accelerating even if its speed isconstant if it(a) comes to a stop(b) is not possible(C) changes direction(d) moves in a straight line
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1.is the rate that velocity changesO AccelerationOTimeODistanceOMass
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a man walks 15 meters in 15 seconds. what is his speed
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m/s2Which equation links acceleration, mass and resultant force?(d)Tick one box.resultant force = mass + accelerationresultant force = mass x accelerationresultant force = mass - accelerationresultant force = mass : accelerationoric Soko
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Two resistors, 2.50 and 4.95 , are wired in series to a 12.00 V battery. What is the equivalent resistance of the circuit?
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A 2.5m long steel piano wire has a diameter of 0.5cm how great is the tention in the wire if it stretches by 0.45cm when tightened taking the young's modulus to be 2.010^11 N/m^2
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A 1.8 kg book has been dropped from the top of the football stadium. Its speed is 4.8 m/s when it is 2.9 m above the ground. How high is the stadium?
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Please help me!!!!Describe the roles these organisms play in their ecosystem.
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Light waves areA.rotating waves.B.longitudinal waves.C.circular waves.D.transverse waves
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A student hangs a block from a light string that is attached to a massive pulley of unknown radius R, as shown in the figure. The student allows the block to fall from rest to the floor. Which two of the following sets of data that could be measured or determined should the student use together to determine the final angular velocity of the pulley just before the block hits the floor? Select two answers. Justify your selections.
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Describe the formation of the land, the atmosphere, and the oceans of earth
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A student of mass 45kg, who is undergoing National Service training, takes 6s to climb a flight of stairs that had 36 steps. If each step is 16cm high, what is the power of the student?
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Air from a metal can is removed so the pressure in the can decreases to 70000Pa, the can is then sealed. The pressure from outside the can is atmospheric pressure which is 100kPa. The area of one side of the can is 1.5m2, find the resultant force on this side of the can.
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Hurryyyyy pleaseeeee!!!!! An ideal gas triples in volume in an adiabatic process. the initial pressure is 1.4 x 10^5 Pa. what is the final pressure? let y = 1.67.5.8 x 10^4 Pa2.2 x 10^4 Pa1.4 x 10^4 Pa1.0 x 10^5 Pa
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Which of the following is an example of heat transfer by conduction?A. Heat is transferred to the air above a candle flame.B. Heat is transferred to the soil on a sunny day.c. Heat is transferred to your hand from a warm cup.D. Heat is transferred to the air from a warm lightbulb.
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Select all the correct answers.Which statements about our solar system are false?Our solar system is made up of the Sun and other objects that orbit the Sun.The Sun is the only star in our solar system.Dwarf planets have several other bodies in their path orbiting the Sun just as they do.The Kuiper Belt is between Uranus and Neptune.A large number of irregularly shaped comets are located in a vast ring between the orbits of Mars and Jupiter.
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Factors that affect the rate at which candle wax melts
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