A driver of an 8,000 kg car that is moving horizontally with a speed of 10 m/s applies brakes and locks the wheels to stop. What would be the length of the skid marks, if the magnitude of the friction force is 80,000 N?
Physics Problem - Skid Mark Length from Braking body { font-family: 'Georgia', serif; background-color: #f2f9ff; color: #2c3e50; padding: 40px; line-height: 1.8; } h1, h2 { text-align: cente
1 kg block is dropped onto a relaxed vertical spring that has a spring constant k = 1000 N/m. The block compresses the spring by 10 cm.
Work and Energy - Spring Compression Physics Problem body { font-family: 'Georgia', serif; background-color: #f4faff; padding: 30px; color: #333; line-height: 1.8; } h1, h2 { text-align: cen
Consider a rod of length ℓ that carries a uniform charge distribution. Is Gauss’s law appropriate for calculating the electric field at a radial distance r from the midpoint of the rod’s length?
Application of Gauss's Law to a Uniformly Charged Rod body { font-family: 'Cambria', serif; background-color: #f9f9fc; color: #222; line-height: 1.8; padding: 40px; } h1, h2 { text-align: ce
Observations indicate that the Universe has: a closed geometry, an open geometry, a flat geometry, a circular geometry. This geometry means that the Universe will:
Universe Geometry and Its Fate body { font-family: 'Georgia', serif; background-color: #f4f9fc; color: #333; line-height: 1.8; padding: 30px; } h1 { color: #00509e; text-align: center;
A small sphere of mass 0.25 g (i.e. 0.25 × 10-3 kg) carries a charge of 9.0 × 10−10 C. The sphere is attached to one end of a very thin silk string of length 5.0 cm.
Angle Made by a Charged Sphere in Electric Field body { font-family: 'Cambria Math', serif; line-height: 1.8; background-color: #f9f9f9; padding: 30px; color: #333; } h1 { color: #0066cc;
A person pushes a 20 kg box across 12 meters of carpet. The coefficient of kinetic friction is μₖ = 0.7. A force of 960 N is applied at an angle of 37° with respect to the horizontal.
Work Done on a Box | Physics Problem Solved body { font-family: Arial, sans-serif; background-color: #f4f6f9; padding: 20px; color: #333; } h1, h2 { color: #0d47a1; } .question-box { background-color: #fff8e1;
Which of these materials can display ferroelectric domains in polycrystalline samples? BaTiO₃ Fe BiFeO₃ TbMnO₃
Ferroelectric Domains in Polycrystalline Materials – Explained body { font-family: Arial, sans-serif; background-color: #f7f9fc; color: #333; padding: 20px; line-height: 1.6; } h1, h2 {
A 111 N block sits on a table. The coefficient of kinetic friction between the block and the table is 0.300. This block is attached to a 258 N block by a rope that passes over a pulley. The second block hangs below the pulley.
Physics Problem: Acceleration and Tension with Pulley System body { font-family: Arial, sans-serif; background-color: #f0f4f8; color: #333; padding: 20px; line-height: 1.6; } h1, h2 {
When uranium-235 undergoes gamma emission, what is the daughter nucleus? Options: A) 92236Vr B) 92235Vr C) 91235Pa D) 92234U
Gamma Emission of Uranium-235 – Daughter Nucleus Explained body { font-family: Arial, sans-serif; background-color: #f4f7f9; padding: 20px; color: #333; } h1, h2 { color: #003366; }
An empty sealed container contains air. Which statements describe the behaviour of air particles in the container?
Behavior of Air Particles in a Sealed Container body { font-family: Arial, sans-serif; background-color: #f4f7f9; color: #333; line-height: 1.6; padding: 20px; } h1, h2 { color: #00