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Physics
Physics
High School
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?
Physics
College
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?
Physics
College
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
Physics
High School
PLEASE HELP!! I PROMISE I'LL GIVE BRAINLIEST!!What would your life look like if you had to use only analog signals?
Physics
High School
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.
Physics
High School
Choose forces from the box to complete these sentences.
Physics
College
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.
Physics
High School
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
Physics
College
1.is the rate that velocity changesO AccelerationOTimeODistanceOMass
Physics
High School
a man walks 15 meters in 15 seconds. what is his speed
Physics
High School
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
Physics
High School
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?
Physics
High School
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
Physics
College
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?
Physics
Middle School
Please help me!!!!Describe the roles these organisms play in their ecosystem.
Physics
High School
Light waves areA.rotating waves.B.longitudinal waves.C.circular waves.D.transverse waves
Physics
College
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.
Physics
College
Describe the formation of the land, the atmosphere, and the oceans of earth
Physics
High School
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?
Physics
High School
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.
Physics
High School
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
Physics
College
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.
Physics
College
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.
Physics
High School
Factors that affect the rate at which candle wax melts
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