1. Валера решил измерить силу, с которой брусок действует на стол. Валера измерил площадь опоры бруска и получил 0,05 м2. Давление бруска на стол равно 3000 Па. Помогите Валере найти силу. 2. Валера решил погрузиться на дно. Он надел скафандр и погрузился на какую-то глубину. С помощью датчиков Валера узнал, что давление на этой глубине равно 2060000 Па. На какой глубине находится Валера, если плотность морской воды равна 1030 кг/м3. 3. У Валеры есть брусок с размерами 2х5х10 см. Потом Валера погрузил брусок в жидкость. Помогите Валере определить плотность жидкости, если выталкивающая сила равна 100Н. 4. У Валеры есть ртутный барометр. Валера долил в барометр спирт. Валера взял линейку и измерил высоту столба ртути в нем, которая равна 765 мм. Помогите Валере узнать, какой высоты столб спирта в сообщающемся сосуде. Плотность спирта 800 кг/м3, а плотность ртути 13600 кг/м3.

There is a theory that indicates that dinosaurs became extinct when about 65 million years ago, a large asteroid hit the earth surface. dust caused by this collision blocked the sunlight reaching the earth's surface and many forms of life became extinct due to the cold. fearing this threat, how large the radius of an asteroid should you be looking for if the dangerous asteroid size is approximately the same as the one that killed the dinosaurs? available data suggests that about 18% of that asteroid's mass ended up as a dust spread evenly over earth after eventually settling out of the upper atmosphere. about 0.0180 g/cm^2 of dust, which is chemically different than the earth's rock, covered the earth's surface. typical asteroids have a density of about 1.9 g/cm^3. now that we know the size of the asteroid, how much energy was released during impact, assuming all of it was just the kinetic energy of the asteroid right before the impact?

1point) a skydiver weighing 130 lb (including equipment) falls vertically downward from an altitude of 14,000 ft and opens the parachute after 20 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.85|v|0.85|v| when the parachute is closed and is of magnitude 17|v|17|v| when the parachute is open, where the velocity vv is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. find the speed of the skydiver when the parachute opens. speed is 150.6121788 ft/s find the skydiver's height when the parachute opens. height is 2338.98591 ft find the limiting velocity vlvl after the parachute opens. (think about whether this should be positive or negative.) vl=vl= 7.647 ft/s

Aregular polygon has angkes of size 150° each.how many side has the polygon