tang ina mo
length?
Trailing edge dimmers (as opposed to leading edge, or triac dimmers) turn off the electrical load at the end, or trailing edge, of the AC input waveform. They control the power to the load by varying the duty cycle (the ratio of on time to on+off time) of the voltage to the load, the same as leading edge or triac dimmers. Cutting off the trailing edge of the waveform allows compatibility with electric loads that are either resistive or capacitive in nature (as opposed to leading edge dimmers which are compatible with resistive and inductive loads). Trailing edge dimmers are more complex than other dimmers, and are usually implemented using back-to-back power FETs (n-channel enhancement-mode MOSFETS with their source terminals connected together, the gates connected together, and the drain terminals acting as the two power terminals). The FETs have an intrinsic body diode which means they always conduct in one direction. Putting two FETs together as described allows current flow to be controlled in either direction (with no gate signal, both FETs are off, and the body diodes allow no current flow either. If one FET is gated on, the current can flow through that FET and the body diode of the other FET). Trailing edge dimmers are designed to fade the voltage to zero rather than switch it abruptly off, by applying a resistance to create a ramp rather than a "cliff." This greatly reduces interfering electrical and radio emissions. It also increases the amount of heat dissipated, since the resistive period generates heat. Most trailing edge dimmers contain thermal monitors that can adjust the ramp if too much heat is being generated.
CW or continuous-wave radar cannot determine range due to the lack of a listening period where the radar signal is silent. Pulse radar has a silent listening period (hence the name pulse radar). Therefore it can determine the range of the object causing the return by counting the elapsed time between transmission and receipt of the echo. The above is not quite correct, Continuous Wave Radar and Pulsed Radar differ by there relationship between the Pulse Width (tau) and the scene size (Swath). CW Radar's determine range by Frequency Modulation (FM) ranging this means that they ramp the RF frequency within the pulse during the transmission and are known as FMCW Radar. Pulsed Radar on the other hand use the pulse timing but can also use the FM Ranging trick to enhanced there signal to noise and reduce there probability of interference or detection/interception. CW radar can deduce range by delaying the transmit signal and mixing it with the receive such that it becomes a homodyne receiver and in such cases it is usual to ramp the RF and perhaps use two aerials rather then just one with a duplexer switch like in a Pulse radar system. Edit- hmm i feel the above answer is bit too complex... i don't think typical person would go as far as concerning FM or Pulse Delay Ranging here's my Answer DIFFERENCES BETWEEN PULSE AND CW RADAR Basis -Transmission Pulse RADAR puts delay between transmitting and receiving periods so the time between transmitted pulse and received pulse is different While CW RADAR, Transmit continuously -Antennas Pulse RADAR may use same antenna for Receiving and Transmitting , when transmitting the receiver is "blanked" and while Receiving the receiver is Activated and transmitter is blanked .. this is done by a device called "Duplexer" CW RADAR typically used 2 Antennas, one for transmit another one to Receive since there are no delay to receive as what usually seen in pulse RADAR -Ranging technique Pulse RADAR may use "Pulse Delay Ranging" to provide Range measurements , Frequency Modulation Ranging may also possible , especially for pulse RADAR that transmit many pulses and have very shot time to "listen" example is FMICW (Frequency Modulated Interrupted Continuous Wave RADAR) While CW RADAR provides Range by means of Doppler based Ranging (FM Ranging)
a flagsure back seat
Basic adc
Reduce the friction of it and the ramp, for example, mounting it on wheels.
at rest it is static friction while on wheels it is rolling friction
In the first situation without wheels, the block of wood is at rest due to static friction between the wood surfaces of the block and the ramp, which resists motion. When wheels are attached, rolling friction replaces static friction, allowing the block to move more easily down the ramp since rolling friction is typically lower than static friction.
1. Put a tall block on the 3rd space from the left. 2. Put a ramp on that so that it is tilted away from the ball. 3. Attach a bridge to the ramp on the ball's side. 4. Put a ramp on top of the bridge. 5. Attach another bridge to the opposite side of the first bridge. 6. Put a small rectangle block in front of the bridge. 7. Put a ramp on the block. 8. Put another ramp on the ground so there is a continued slant. 9. Point the arrow towards the hole and put it on the ground after the last ramp. 10. Press start and watch it go!
yes height effects potentail energy because if you have a meter stick and a ramp at 50 centemeters with a block at the bottom then roll a ball down the ramp the block at the bottom will go pretty long but if you put the ramp higher the block will go longer
The ideal mechanical advantage of a ramp is calculated by dividing the length of the ramp by the vertical height. In this case, the ideal mechanical advantage of the ramp is 120m (length) divided by 20m (height) which equals 6. Therefore, the ideal mechanical advantage of the ramp is 6.
4 meters/second
Increasing the mass of the wooden block would require more force to pull it up the ramp compared to increasing the steepness of the ramp. This is because the force required to lift an object is directly proportional to its mass, while the force required to lift an object up a ramp is determined by the component of the gravitational force acting perpendicular to the ramp.
Tin foil
the block once quarried was placed on a sledge by a gang of about 20 naked slaves hauling on ropes made from papyrus reeds. Water or oil was poured under the runner to reduce friction. To get to the working level and eventually to the top they most likely built a ramp. This may have been a single ramp extended as the pyramid grew or one that spiralled around the structure.