Um motorista pretende percorrer uma distancia de 200km em 2,5 h. por dificuldades de trafego, ele percorre 25km a razão de 60 km/h. que velocidade media deve ter no trecho restante para chegar no tempo pretendido

Which of the following equations is balanced correctly? A. 3 H2O → H2 + 3 O2 B. Cl2 + 2 KBr → KCl + Br2 C. 2 C2H2 + 5 O2 → 4 CO2 + 2 H2O D. 2 C3H3 + O2 → 2 CO2 + H2O

The law of reflection of light holds true for a. all mirrors c. plane mirrors and concave mirrors e. only concave mirrors b. only plane mirrors d. plane mirrors and convex mirrors

The magnitude of the gravitational force between a particle of mass m1 and one of mass m2 is given by F (x) = G m1m2 / x2, where G is a constant and x is the distance between the particles. (Use any variable or symbol stated above as necessary.

The orbit of Mars takes about 1.88 years. What is it's average distance from the sun?

To study waves that humans can see which section of the electromagnetic spectrum would you use

the half-life of carbon - 14 is 5730 years. What fraction of carbon-14 would remain after 11,460 years?

An object with a mass of 10.9 kg experiences a force of 18.53 N. What is the acceleration of the object? A. 2.2 m/s2 B. 1.7 m/s2 C. 16.83 m/s2 D. 1.3 m/s2

A proton, starting from rest, accelerates through a potential difference of 1.0 kV and then moves into a magnetic field of 0.040 T at a right angle to the field. What is the radius of the proton's resulting orbit

Which of the following terms are needed to completely describe speed? Check all that apply. A. Units B. Direction C. Number D. Mass

Drivers are able to see objects ahead of them because light travels through windshields.