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A hiker shouts toward a vertical cliff 465 m away. The echo is heard 2.75 s later. (a) What is the speed of sound in air there? (b) The wavelength of the sound is 0.75 m. What is the frequency of t
A 30 g car rolls from a hill 12 cm high and is traveling at 154 cm/s as it travels along a 275 cm horizontal track. What is the momentum of the car?
Vector B has a magnitude of 43 and is pointing at an angle of 38 degrees south of west. Find the magnitude and direction of A+B.
A coil is wrapped with 647 turns of wire on the perimeter of a circular frame (of radius27 cm). Each turn has the same area, equal to that of the frame. A uniform magnetic field is directed perpendi
What Methods have scientist used to study components, processes, and outcomes of cell division?
The sensor on the torso of a crash-test dummy records the magnitude and direction of the net forceacting on the dummy. If the dummy is thrown foward with a force of 130 N while simultaneously being
Explain the relationship between mitosis in eukaryotic cells and binary fission in prokaryotes.
What is the type of beam of light produced by a lamp placed at the focal point of a converging lens
The brakes of a car moving at 14 m/s are applied, and the car comes to a stop in 4 s. What was the car's acceleration?
What should the banking angle of the curves be so that the force of the pavement on the tires of the car is in the normal direction? (Hint: What does this requirement tell you about the frictional f
Four group of microorganism are studied in this unit - viruses, bacteria, protests and fungi. In four columns list what you already know about microorganisms.
The magnitude of each force is 251 N, the force on the right is applied at an angle 41 degrees and the mass of the block is 24 kg. The coefficient of friction is 0.134. the acceleration is 9.8. what
A galvanometer whose full scale current is 150.0 amps and coal resistance is 75.0 ohms is used with a 1.50 ohms shunt resistor to make an ammeter. What is the largest current which can be measured
A 0.32kg object is attached to a spring constant 165N/m so that the object is allowed to move on a horizontal frictionless surface. The object is released from rest when the spring is compressed 0.
How do storms, diseases, and predators affect coral reef communities?
An infinite cylinder of radius a, with dielectric constant 0 placed along the z-axis in a region. Find the bound charge density on the surface of the cylinder.
Orange light (λvacuum = 614 nm) shines on a soap film (n = 1.29) that has air on either side of it. The light strikes the film perpendicularly. What is the minimum thickness of the film for w
Rank the magnitudes of the forces exerted on the following particles from largest to smallest. In your ranking, display any cases of equality. (Use only ">" or "=" symbols. Do not include any pa
A coin is placed 15.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turntable until a rate of 32 rpm
What are the direct products of the light reactions of photosynthesis
An ocean liner leaves New York City and travels 45.0° north of east for 241 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship'
A speed skater moving across frictionless ice at 8.80 {rm m/s} hits a 4.30-m-wide patch of rough ice. She slows steadily, then continues on at 5.20 {rm m/s}. What is her acceleration on the rough i
A small remote controlled car with a mass of 1.6 kg moves at a constant speed of 12 m/s in a vertical circle inside a hollow cylinder that has a radius of 5 m. What is the magnitude of the normal fo
What is the genotype of a man who has unsttached earlobes but whose mother has attched earlobes?
A cube of ice is taken from the freezer at -9.1°C and placed in a 97 g aluminum calorimeter filled with 294 g of water at room temperature of 20°C. The final situation is observed to be all