Questions tagged 'Physics'
312 questions
Physics Problem (membrane diffusion)?
Living cells actively transport singly ionized sodium ions (Na⁺) from the inside of the cell to the outside in order to maintain a membrane potential, defined as ΔV_membrane = V_in − V_out = -70 mV. T...
a steel block has a volume of 0.08 m3 and a density of 7,840 kg/m3. What is the force of gravity acting on the
A steel block has a volume of 0.08 m³ and a density of 7,840 kg/m³. What is the weight of the block when it is submerged in water? A: 5,362.56 N B: 6,150.64 N C: 6,700.56 N D: 7,600.18 N
Suppose that the position vector for a particle is given as a function of time by (t) = x(t) + y(t), with x(t)?
Suppose the position vector for a particle is given as a function of time by r(t) = x(t) + y(t), where x(t) = at + b and y(t) = ct² + d. The constants are defined as follows: a = 1.70 m/s, b = 1.20 m,...
Consider an excited-state hydrogen atom. What is the energy of the electron in the n = 5 level?
Consider a hydrogen atom in its ground state. What is the energy of its electron? The energy is -2.17 x 10^-18 joules. Now, let's examine an excited-state hydrogen atom. What is the energy of the elec...
Physics question concerning a Modified Atwood Machine?
On a modified Atwood machine (such as this one: http://spiff.rit.edu/classes/phys311/workshops/w5b), suppose the hanging mass is m2 = 254 g and the mass of the cart is m1 = 1205 g. Assume there is no...
Physics, 9, wavelength, instruments vibrations?
A combination work of art and musical instrument is illustrated (http://session.masteringphysics.com/problemAsset/1…). Six pieces of identical piano wire, each cut to different lengths, are hung from...
A figure skater rotating at 5.00 rad/s with arms extended has a moment of inertia of 2.25 kg/m2.?
A figure skater is rotating with an initial angular speed of 5.00 rad/s and a moment of inertia of 2.25 kg/m². If the skater pulls in their arms, reducing the moment of inertia to 1.80 kg/m², what wil...
The 10kg block in the figure slides down a frictionless ramp.?
The 10 kg block shown in Figure 1 slides down a frictionless ramp. What is its acceleration? You can view the picture here: http://s1272.beta.photobucket.com/user/kurtcopain/...
An object is moving at 18 m/s at an angle of 220 ∘ counterclockwise from the x axis. What is the objects acceleration in vector unit i^+j^?
An object is moving at a speed of 18 m/s at an angle of 220 degrees counterclockwise from the x-axis. What is the object's acceleration expressed in vector form using the unit vectors î and ĵ?
Oct 10, 2024
A conveyor belt carries supplies from the first floor to the second
A conveyor belt transports supplies from the first floor to the second floor, which is 12 feet higher. The belt makes a 60-degree angle with the ground. How far do the supplies travel from one end of...