Một chùm ảnh sáng đơn sắc, song song có bước sóng À = 0,62 um chiếu vuông góc với mặt dưới của một nêm nước (chiết suất n = 4/3). Quan sát trong ánh sáng phản xạ người

ta đo được độ rộng của mỗi vân giao thoa bằng 0,05 mm. Hỏi hai mặt nêm nghiêng với nhau

một góc bao nhiều độ?

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards

a 2,000 calorie based diet.

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.

answeralert drivers who drift off the road;