Astudent wants to lift a 350 n bucket of water up from the bottom of a well using a wheel and axle. the wheel has a radius of 55 cm, and the axle has a radius of 15 cm. how much force will the student need to provide to the wheel to turn it and lift the bucket? 28.8 n 4242 n 1283 n 95.5 n

Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.

It's a snowy day and you're pulling a friend along a level road on a sled. you've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you've been walking at a steady 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .

The three classes of rocks are sedimentary, metamorphic, and igneous. how are rocks classified into one of these three groups?