The work function, $\phi$ is the amount of energy required to free the electron from the pull of the nuclei of the atoms of the photosurface. Here $\phi=3\text{ eV}$. Since the kinetic energy of ...

To stop instantly, you would need infinite deceleration. This in turn, requires infinite force, as demonstrable with this equation: $$\vec F=m\vec a$$ So when you hit a wall, you do not instantly stop ...

The energy of a photon (which I presume you are referring to) is given by: $$E=hf$$ Since the frequency does not change when light transfers from medium to medium, and Planck's constant is... constant,...

Terminal velocity is the speed at which the drag force equals $mg$; hence, the object will remain at that speed. That said, there will be slight fluctuations because of the increasing strength of ...

You can have a lot of force, but that does not necessarily mean you can cut the apple. Remember that $$P=F/A$$ So if you have a sharp knife you only need a small force because the pressure will be ...
First: There is $8\ \text{cm}^3$ of ice, and with a density of about $0.92\ \text g/\text{cm}^3$; hence, the total mass is $7.36\ \text g$. Since the density of water is about $1.00\ \text g/\text{... View answer 2 votes I presume you are referring to process of nuclear fission of uranium-235, which has the equation: $$^1_0\text{n}+^{235}_{\ \ 92}\text{U}\longrightarrow ^{236}_{\ \ 92}\text{U}$$ However, a subsequent ... View answer Accepted answer 2 votes The state from$1\text{ atm}$to$2\text{ atm}$is normally called decompression or contraction. An equation you can use going from one state to the next is: $$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$$ ... View answer 2 votes No, it is not correct. Let$a$be acceleration;$F$force;$m$mass;$v_0$initial velocity;$v_f$final velocity;$P$power required;$x$distance travelled and$ttime taken. Hence, $$P=\frac{Fs}{t}... View answer 2 votes The natural tendency of a rope is to move to the lowest possible tension. When an object hangs onto a rope, it slides down to the lowest possible point, at which the tension is uniform. Now, ... View answer Accepted answer 2 votes This article is very good in describing the dangers of electricity, which I suggest you read. http://www.allaboutcircuits.com/vol_1/chpt_3/4.html To summarise the article, 20\text{ mA} for 60\text{... View answer Accepted answer 1 votes The sum of the torques is zero, \sum \tau =0. Thus, since the centre of mass is in the middle of the pole, that's where the weight W will act. F_y, is the normal force exerted by the pole on the ... View answer 1 votes Regarding questions one and two, I recommend that you search up how a battery works. But in essence, ions flow in the battery, whilst electrons are routed through the wire to do useful work. This is ... View answer 1 votes The force is only applied for that distance, the fact that it is the same implies that the smaller object will have lower speed. Note that the relation does not imply the distance the object will move;... View answer Accepted answer 1 votes There exists indeed a subtle difference, and are often referred to as angular frequency and angular velocity. Both are \omega and have units \text{s}^{-1}. The difference lies in the fact that ... View answer Accepted answer 1 votes Yes, you are correct in stating that the tension will be higher. In fact, it is simply:$$T=mg+ma$$It is important however, to make the distinction between tension and the maximum tensile strength. ... View answer Accepted answer 1 votes The only force in acting on bodies in circular motion is the centripetal force, equal to$$F=\frac{mv^2}{r}The centripetal force acts to the centre of the rotating body; there is no such thing as a ... View answer 1 votes The system will eventually reach thermal equilibrium so heat received by the gas is the same as heat lost by the container. So: m c (T_f-T_i) + m c(T_f-T_i) = 0. Hence you need to know the specific ... View answer 1 votes Like you said, the net force of the body keeps increasing, so the body does not have constant acceleration. However, keep in mind that the body will eventually approach the speed of light. That said, ... View answer 0 votes A microwave works by dielectric heating, where an oscillating high frequency electric field causes polar molecules to align in the field. Since the field alternates, they will rotate continuously ... View answer 0 votes We have two different masses attached to the same rope, meaning that their acceleration will be the same. Also, tension is equal throughout the rope, meaning that is the same as well. When we consider ... View answer Accepted answer 0 votes NOTE: The blockquotes only apply with a gradual increase in acceleration starting from 0\ \text m\text s^{-2}. The trajectory that it makes depends almost entirely on the coefficient of friction ... View answer 0 votes Friction is what keeps the wheels from spinning (i.e. traction), the friction that you want to reduce in order to gain speed, is air resistance. Removing a wheel adds more strain (friction) to the ... View answer -2 votes The interior of a solenoid the magnetic field is uniform in magnitude and direction and is given by:B=\mu_0 \frac{NI}{L}$Where$N$is the number of turns,$L$the length of the solenoid and$I\$ ...