Classify each of the following as a compound, a homogeneous mixture, or a heterogeneous mixture: orange juice;

Una canoa ha una velocità di 0,40 m/s sud-est rispetto alla terraferma. La canoa si trova su un fiume che scorre a 0,50 m/s a est rispetto alla terraferma. Trova la velocità (magnitudo e direzione) della canoa rispetto al fiume.

A water skier has a mass of 73 kg. Find the magnitude of the net force acting on the skier when she is accelerated from rest to a speed of 11 m/s in 8 s.

A glass bottle of soda is sealed with a screw cap. The absolute pressure of the carbon dioxide inside the bottle is 1.80 x 10^5 Pa. Assuming that the top and bottom surfaces of the cap each have an area of 4.10 x 10-4 m^2, obtain the magnitude of the force that the screw thread exerts on the cap in order to keep it on the bottle. The air pressure outside the bottle is one atmosphere.

A man weighs 442 N on Earth. What would he weigh on Jupiter where the free fall acceleration is 25.9 m/s^2? The acceleration of gravity on Earth is 9.8 m/s^2. Answer in the unit of N.

Ammonium dihydrogen phosphate, formed from the reaction of phosphoric acid with ammonia, is used as a crop fertilizer as well as a component of some fire extinguishers, What are the mass percentages of N and P in the compound?

A ball with a mass of 0.500 kg is moving at 20 m/s. The uncertainty in momentum is 1 10^-10 kg m/s of its momentum. Determine the uncertainty in position in m.

a. Qual è la densità di un campione di 84,7 g di una sostanza sconosciuta se il campione occupa 49,6 cm3?

b. Quale volume sarebbe occupato da 7,75 g di questa stessa sostanza?

Una persona compie un viaggio guidando a una velocità costante di 89,5 km/h, fatta eccezione per una sosta di 22,0 minuti. Se la velocità media della persona è di 77,8 km/h,

(a) quanto tempo è durato il viaggio e

(b) quanto distanza ha percorso la persona?

Aluminum sulfate, known ascake alum, has a wide range of uses, from dyeing leather and cloth to purifying sewage. In aqueous solution, it reacts with base to form a white precipitate,

Write balanced total and net ionic equations for its reaction with aqueous NaOH.

Un camion percorre 40,0 m in 8,50 s mentre rallenta dolcemente fino alla velocità finale di 2,80 m/s.

a.) Trova la sua velocità originale.

b.) Trova la sua accelerazione.

A steam turbine operates at a boiler temperature of 471.0 k and an exhaust temperature of 286.5 k. a) What is the maximum theoretical efficiency of this system? b) If the system operates at maximum efficiency and the boiler expels 20.0 kJ of energy to the cold reservoir, how much energy does it absorb from the hot reservoir?

Name three common strong acids

A rigid body rotates about a fixed axis with a constant angular acceleration. Which one of the following statements is true concerning the tangential acceleration of any point of the body?

A) The tangential acceleration is zero m/s².

B) The tangential acceleration depends on the angular velocity.

C) The tangential acceleration is equal to the centripetal acceleration.

D) The tangential acceleration is constant in both magnitude and direction.

E) The tangential acceleration depends on the change in the angular velocity.

The figure shows the velocity graph of a 75 kg passenger in an elevator. What is the passenger's apparent weight at t=1 s, t=5 s, and t=9 s?