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Abox has a weight of 150N and if being pulled across ahorizontal floor by a force that has a magnitude of 110N. The pulling force can point horizontally, or it can point above the horizontal at an angle θ. When the pulling force points horizontally, the kinetic frictional force acting on the box is twice as large as when the pulling force points at the angleθ. Find θ.
An aluminum sphere has a radius of 46cm on the Earth. It is then taken to a distant planet where theatmospheric pressure P is much larger than on the Earth. If the sphere has a radius of 29 cm onthat planet, what is P?
A viral preperation was inactivated in a chemical bath. The inactivation process was found to be first order in virus concentration, and at the beginning of the experiment 2.0% of the virus has found to be inactivated per minute.
You will find in Chapter 39 that the electrons cannot move indefinite orbits within atoms, like the planets in our solar system. What would be the photon energy of this light
Calculate the number of electrons in a steel (iron) pinhead. The pinhead may be assumed to be spherical with diameter 2 mm
In a friendly game of handball, you hit the ball essentially at ground level, How high is the ball when it hits the wall
An aluminum tray used for making ice cubes is filled with water and placed in a freezer at 20.0 C. The emissivity of the aluminum is close to zero, but the emissivity of water or ice is 0.950. The exposed top surface area of each ice cube is 20.0..
An object with mass 2.0 kg is attached to aspring with spring stiffness constant k = 290 N/m, Calculate the maximum velocity attained by the object
A man drags a 78.0-kg crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the crate. Find the magnitude of the tension in the strap
Consider a resistor series RC circuit with a 6.7 µF, capacitor, a 4.5 × 10^6? resistor and 38 V emf. Find the maximum charge on the capacitor
How many moles of gas are in a balloon with a volume of 5.07 liters at a temperature of 298 K and a pressure of 1.11 atm
a damped harmonic oscillator consists of a block m 2.00 kg a spring k 10.0 nm and a damping force the is linearly
in any triangle the sum of the measures of the angles is 180deg. in a triangle abc angle a is four times as large as
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