El bloque A de la figura se posiciona en una mesa horizontal sin fricción y es acelerado por una fuerza generada por el bloque B. B cae verticalmente mientras A se desliza horizontalmente sobre la mesa. Ambos bloques tienen una masa M. a.- La masa total del sistema es:

b.- La fuerza que acelera A+B es el peso de

c.- El peso de B es:

d.- La aceleración del sistema es:

Suponga que el bloque A tiene 1 kg de masa y B es un objeto de masa reducida (una pluma o moneda).
e.- En comparación con el problema anterior, la aceleración del sistema es

f.- En este caso, la aceleración de B es:

Suponga que A es ahora una pluma o moneda, y B un objeto de masa 1 kg. Conteste
g.- La aceleración del sistema es:

h.- En este caso, la aceleración de B es:

i.- En caída libre la aceleración es:

j.- Si se lanza verticalmente hacia arriba un objeto, en su punto más alto la aceleración sería:

An internally reversible refrigerator has a modified coefficient of performance accounting for realistic heat transfer processes of where qin is the refrigerator cooling rate, qout is the heat rejection rate, and is the power input. show that copm can be expressed in terms of the reservoir temperatures tc and th, the cold and hot thermal resistances rt, c and rt, h, and qin, as where rtot rt, c rt, h. also, show that the power input may be expressed as 1.39 a household refrigerator operates with cold- and hot-temperature reservoirs of tc 5 c and th 25 c, respectively. when new, the cold and hot side resistances are rc, n 0.05 k/w and rh, n 0.04 k/w, respectively. over time, dust accumulates on the refrigerator’s condenser coil, which is located behind the refrigerator, increasing the hot side resistance to rh, d 0.1 k/w. it is desired to have a refrigerator cooling rate of qin 750 w. using the results of problem 1.38, determine the modified coefficient of performance and the required power input w under (a) clean and (b) dusty coil conditions. internally reversible refrigerator qout qin w high-temperature reservoir low-temperature reservoir th th, i tc, i tc high-temperature side resistance low-temperature side resistance w qin th tc qinrtot tc qinrtot copm tc qinrtot th tc

Scout feels ill one day before school. her mother puts a thermometer in her mouth and the temperature begins to climb to 100°f. what is happening between the cooler thermometer and scout's body? a) scout's body is applying a force to the particles in the thermometer. b) kinetic energy is being transferred from her mouth to the thermometer. c) potential energy is being lost by the thermometer and gained by scout's body. d) the potential energy stored in foods is converted to mechanical energy to raise the mercury in the thermometer.

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader