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Three blocks are arranged in a stack on a frictionless horizontal surface. The bottom block has a mass of 37.0 kg. A block of mass 18.0 kg sits on top of it and a 28.0 kg block sits on top of the m
A rocket blasts off vertically from rest on the launch pad with an upward acceleration of 2.30 . At 10.0 after blastoff, the engines suddenly fail, which means that the force they produce instantly
1. Using Darwins reasoning, explain how four species of lizards, all closely related came to be separated species on a Caribbean island?
A firefighter of mass 69 kg slides down a vertical pole with an acceleration of 3 m/s2. The acceleration of gravity is 10 m/s2 . What is the friction force that acts on him?
What effect did lowering the temperature have on the mouse"s oxygen consumption? What is the effect on cellular respiration? Is this result what you would expect?
Carnot engine operated "in reverse" as a heat pump achieves the maximum coefficient of performance. A Carnot heat pump operates to warm a house, where the outside temperature is 12°C and the ins
A penny is placed at the outer edge of a disk (radius = 0.150 m) that rotates about an axis perpendicular to the plane of the disk at its center. The period of the rotation is 1.80 s. Find the mini
Two stationary positive point charges, charge 1 of magnitude 3.10 nC and charge 2 of magnitude 1.74 nC, are separated by a distance of 36.0 cm. An electron is released from rest at the point midway
What are the two ways a stroke can occur?
1. Freckles are due to dominant alleles (F), and no freckles are due to recessive alleles (f). Ted and Mary both have freckles, but their son Billy has no freckles. Give the genotypes of Ted, Mary and
During one engine cycle, a lawnmower engine does 55.2 J of net work. In the process, it expels 153 J of energy as heat. What is the percent efficiency of the engine?
Suppose water costs 0.56 cents per kg, and energy costs 10 cents per kWh. If the market charges 99 cents for 2.3 kg of ice, what is its maximum profit on the ice? Express your answer to the nearest
From the launch to the return to the ground, by how much is the mechanical energy of the skier-Earth system reduced because of air drag?
A small, 300 {rm g} cart is moving at 1.60 {rm m/s} on an air track when it collides with a larger, 3.00 {rm kg} cart at rest. After the collision, the small cart recoils at 0.890 {rm m/s}. What is
A 8.1 kg chair is pushed across a frictionless floor with a force of 42 N that is applied at an angle of 22° downward from the horizontal. What is the magnitude of the acceleration of the chair
A 35.0-g bullet moving at 475 m/s strikes a 5.0-kg bag of flour that is on ice, at rest. The bullet passes through the bag, leaving at 295 m/s. How fast is the bag moving when the bullet exits?
A uniform lead sphere and a uniform aluminum sphere have the same mass. What is the ratio of the radius of the aluminum sphere to the radius of the lead sphere?
One tank of goldfish is fed the normal amount of food once a day, a second tank is fed twice a day, and a third tank four times a day during a six week study. The Fish's body fat is recorded. What is
A spaceship is coming directly toward you while you are in the international space station. you are told that the spaceship is shining sodium light. you have an apparatus that an resolve two closel
Calculate the charge on the plates when t=0.500 u_s (mu sub s and find the electric field between the plates when t=0.500 u_s.
A steel ball bearing is 4 cm in diameter at 27C. A bronze plate has a hole that is 3.997 cm in diameter at 27C. What common temperature must they have in order for the ball to just squeeze throug
When a jellyfish is removed from its saltwater environment and put into fresh water it swells and bursts. Do you think a jellyfish is a plant or an animal? Why? (think about how plant cells and animal
Bonnie and Clyde are sliding 380 bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 420 of force while Bonnie pulls forward on a
Start with the ideal gas partition function and show that the Helmholtz energy for the ideal gas is not proportional to N, whereas the Gibbs energy of the ideal gas is.
Describe how cellular respiration and photosynthesis are related. Do plant cells conduct cellular respiration? Why or why not?