Eleatric held intersity at a point on the non- axial line of a electric dipole.

Answer True or False. 1. In motion means moving. 2. Scientists do not use a frame of reference to talk about motion. 3. You cannot tell whether an object is in motion unless you have frame of reference. 4. A frame of reference is some other object to which you compar an object's position. 5. When scientists study the motion of stars in the sky, they use clouds as a frame of reference.

1. If you were to visit a planet that was much more massive than earth, your mass would be a) More b) Less c) The same d) Impossible to tell without knowing which planet you are visiting. 2. Which of the following is not a form of light? a) radio waves b) microwaves c) x-rays d) All of the above are a form of light. e) None of the above is a form of light

Uno ascensor y su carga pesan 12000 N . Si sube desde una planta baja hasta un quinto piso situado a 12 m de altura en un tiempo de dos minutos; calcula en referencia al motor que acciona la carga, el trabajo realizado durante la maniobra. (ANOTA EL RESULTADO PORQUE QUIZÁS LO NECESITARÁS PARA HACER LAS CUESTIONES 14 Y 15) RECUERDA NO PONER LAS UNIDADES, SÓLO EL NÚMERO. TAMPOCO PUEDES PONER LOS PUNTOS EN LOS MILLERS (POR EJEMPLO CINCUENTA MIL NO LO PUEDES PONER COMO 50.000, HAY QUE PONER 50000), LOS DECIMALES LOS TIENES QUE PONER CON UNA COMA ABAJO: EJEMPLO 3,5

Two forces of magnitude 30 newtons \( (N) \) and 60 N act on an object at angles of \( 30^{\circ} \) and \( -45^{\circ} \) with the positive \( x \)-axis as shown in the figure. Find the direction and magnitude of the resultant force; that is, find \( F_{1}+F_{2} \). \( F_{1}+F_{2}=(\square) \mathbf{i}+(\square) \mathbf{j} \) (Simplify your answer, including any radicals. Use integers or fractions

- Cuál es el área mínima de un bloque de hielo flatando en el ugua para poder sustentar a un aulomóvil que pesa 1200 kg f?. El bloque tiene una altura de \( 2 \mathrm{~mm} .\left(\rho_{\text {hielo }}=0,9 \mathrm{gf} / \mathrm{cm}^{3}\right) \).