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What is the magnifying power of an astronomical telescope having 0.1 diopter object and 20 diopter of eye piece. also find the length of the telescope.
Retrorockets are fired along the line of motion to reduce the probe's speed. The retrorockets generate a force of 3.0 105 N over a distance of 2600 km. What is the final speed of the probe?
A 500 turn solenoid, 25 cm long, has a diameter of 2.8 cm. A 10 turn coil is wound tightly around the center of the solenoid. If the current in the solenoid increases uniformly from 0 to 5.0 A in 0.
What is the magnitude of the net torque exerted on the branch by the children? Assume that the axis is located where the branch joins the tree trunk and is perpendicular to the plane formed by the b
A 2.1 x 10^3 kg car starts from rest at the top of a driveway that's sloped at an angle of 20.0 degrees with the horizontal. An avg. friction force of 4.0 x 10^3 impedes the cars motion so that the
A 77.9-kg fireman slides down a 4.13-m pole by applying a frictional force of 343 N against the pole with his hands. If he slides from rest, how fast is he moving once he reaches the ground?
Sketch an x-t graph of the motion of both vehicles. Take x=0 at theintersection. sketch a vx-t graph of the motion of bothvehicles.
A tennis ball (m = 59 g) is projected vertically with an initial speed of 9.7 m/s. (a) If the ball rises to a maximum height of 3.1 m, how much kinetic energy was dissipated by the drag force of air
A car is traveling at 50.0 km/h on a flat highway. If the coefficient of friction between the road and the tires on a rainy day is 0.100, what is the minimum distance needed for the car to stop?
Start by observing the living species around you. Ever wonder why a pollinator is attracted to a particular flower, or what would happen to predator species if a particular prey species is eliminated?
What is the electromagnetic spectrum? Give examples of each kind of wave and relate each example to its relative position in the spectrum.
A long horizontal wire carries a current of 48 . A second wire, made of 2.2 diameter copper wire and parallel to the first, is kept in suspension magnetically 15 below . What is the current of the s
The skis have a thrust of 200 N. Sams speed at the bottom is 40 m/s. What is the coefficient of kinetic friction of his skis on snow?
A 100 kg crate is being pushed across a horizontal floor by a force P that makes an angle of 30.0 below the horizontal. The coefficient of kinetic friction is 0.200. What should be the magnitude of
During 5 successive 0.97 min intervals, a runner moves at the following constant speeds: 0.436 km/min, 0.250 km/min, 0.160 km/min, 0.160 km/min, and 0.320 km/min. Compute the total distance travele
How is information about DNA structure used as a taxonomic tool?
An automobile club plans to race a 710 kg car at the local racetrack. The car needs to be able to travel around several 160 m radius curves at 93 km/h. What should the banking angle of the curves be
Describe the organization of the animal kindom and at least six physical characteristics scientists consider to determine the evolutionary relationships among animals
What will be the equilibrium temperature when a 256 block of copper at 295 is placed in a 154 aluminum calorimeter cup containing 824 of water at 13.3?
Why was it not necessary to isolate virgin females for the F1 cross for the genetics of organisms lab
Design an experiment using the vaccinia virus to make a vaccine against AIDS virus (HIV)
A 5.00 g lead bullet traveling at 235 m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet while the other half i
How high would the insect jump if air resistance could be ignored? Note that the actual height obtained is about 0.7 m, so air resistance is important here.
The leaves of a desert plant often have two or more layers of palisade mesophyll, rather than the single layer that is characteristic of most leaves. How might this modified structure be advantageous
A flight attendant pulls her 63 N flight bag a distance of 277 m along a level airport floor at a constant velocity. The force she exerts is 35 N at an angle of 57° above the horizontal. Find t