A satellite of mass 1500 kg is orbiting a planet at an orbital radius of 2.6x107 m. It experiences a centripetal force of 4.7x103 N. The speed of the satellite is:
Which of the following is a true statement about the operation of a transformer?
The device below is most probably used to:
Wikipedia uses the following phrase: “the use of the relative movement and gravity of a planet or other celestial body to alter the path and speed of a spacecraft, typically in order to save propellant, time, and expense.” to describe:
Below, which shows an electron travelling to the right between a pair of charged parallel metal plates.If it was desired for the electrons to be undeflected using a magnetic field in addition to the electric field above, then the direction of the magnetic field would need to be:
Edison and Westinghouse were involved in competition to supply electricity to homes in the USA. Which of the following is a true statement?
The diagram below shows a current carrying wire inclined at 30° to a magnetic field. The force that the wire experiences as a result of its interaction with the field is 1.2 N. The length of the wire in the field is:
An electron in a particle accelerator is found to have a mass of 1.42x10-30 kg. The speed of the electron is:
A transformer designed to convert Australian domestic voltage (240 V AC) to a voltage compatible in the USA (120 V AC) has 200 turns in its primary coil. What is the number of turns in its secondary coil?
A square coil of side length 0.5 m sitting in a perpendicular field, experiences a magnetic flux of 100 Wb. If both the magnetic field strength and the side length are doubled, the new magnetic flux will be:
Below, which shows an electron travelling to the right between a pair of charged parallel metal plates.If the voltage between the plates is 100V and their separation is 0.10 m then the magnitude of the force on an electron fired between the plates is:
A DC motor:
The scientist responsible for the first production and detection of radio waves was:
Below, which shows a projectile launched at an angle of 30° above a horizontal surface at a speed of 27.0 ms^-1.The horizontal component of the initial velocity of the projectile is:
Below, which shows a projectile launched at an angle of 30° above a horizontal surface at a speed of 27.0 ms^-1.The horizontal range of the projectile is: