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Questions in physics

[Answered] What is the value of the charge of a body that carries 20 excess electrons?

[Answered] Are distance and displacement always equal?

[Answered] A cannonball is launched horizontally with a speed of 20 m/s, and a baseball is dropped off a cliff, accelerating at a rate of 10 m/s². Which will hit the ground first?

[Answered] A 1.8 kg object moves in the x direction according to the following function: \[ x(t) = 2t^2 + 3t - 5 \] (SI units). What is the force on the object after 2.7 s?

[Answered] Assume that your house uses an average of 16 kWh of electrical energy per day. If you could convert the mass of a 46 g golf ball into electrical energy, how many years' supply of energy would you have? Note: 1 kWh = 3.6 x 10^6 J Use the equation [tex]E = mc^2[/tex] to solve the question. Please show your work.

[Answered] A car drives past a pole at 40 km/hr. Describe the motion from the point of view of: a) The car b) The pole

[Answered] Starting at a certain speed, a bicyclist travels 200 m. Suppose the bicyclist undergoes a constant acceleration of 1.20 m/s\(^2\). If the final speed is 25.0 m/s, what was the bicyclist's initial speed?

[Answered] Two hundred newton-meters of work is put into a machine over a distance of 20 meters. The machine does 150 newton-meters of work as it lifts a load 10 meters high. What is the mechanical advantage of the machine?

[Answered] Is the equivalent resistor in a series circuit larger than either individual resistor, or is it smaller?

[Answered] Do all electromagnetic waves travel at the speed of light, carry energy, and travel through a vacuum?