Master Physics with Fun Quizzes & Brain Teasers!

Calculate the gravitational potential energy a 1kg ball has when thrown 3 m into the air. The gravitational field strength on earth is 9.8 N/kg
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wo parallel conducting plates are separated by 10.0 cm, and one of them is taken to be at zero volts. (a) What is the magnitude of the electric field strength between them, if the potential 7.05 cm from the zero volt plate (and 2.95 cm from the other) is 393 V?
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In a Heating and Cooling Curve, what is occurring during the flat portions of the curve when the temperature is constant, and what is the energy being used to do?a) there is no energy being addedb) it is speeding up the particlesit is changing the phasec) it is increasing the kenetic energyd) it is decreasing the kinetic energy
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A baseball is hit by a batter with an initial velocity of 95 miles per hour at 45 above the horizontal. The opposing team misses the catch and the baseball lands in the outfield 50 meters from where it started. How long was the baseball in the air
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How far does a car travel if it exerts 10 N of force and does 5 J of work?
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Calculate the amount of work for a car that exerts 10N and travels a distance of 5 meters.
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The Thomson model of a hydrogen atom is a sphere of positive charge with an electron (a point charge) at its center. The total positive charge equals the electronic charge e. Prove that when the electron is at a distance r from the center of the sphere of positive charge, it is attracted with a force F=\frac{e^2r}{4\pi\varepsilon_oR^3} where R is the radius of the sphere.
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Dr. Jones performed an experiment to monitor the effects of sunlight exposure on stem density in aquatic plants. In the study, Dr. Jones measured the mass and volume of stems grown in 5 levels of sun exposure. The data is represented below. Sun exposure Stem mass (g) Stem volume (mL) 30 275 110045 415 121560 563 142575 815 1610 90 954 1742a. Convert the mass measurements to kilograms (kg) and the volume measurements to cubic meters (m). b. Calculate the density of the samples using the equation d = m/v. d = density m = mass (kg) v = volume (m) c. Convert the density values to scientific notation.
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An aluminum bar 600mm long, with diameter 40mm long has a hole drilled in the center of the bar.The hole is 30mm in diameter and is 100mm long. If modulus of elasticity for the aluminum is 85GN/m2.Calculate the total contraction on the bar due to a compressive load in 180KN
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Write formulas for the initial speed of a projectile you will use in this lab using both kinematics and energy methods (two formulas). The kinematics formula should be in terms of horizontal and vertical displacements. The energy formula should be in terms or vertical height, projectile mass, and solid pendulum mass. Identify all variables and SI units.
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What is the initial velocity of a runner who reaches a velocity of 2.41 m/s due east in 2.50 s, 2assuming his average acceleration during that period of time is 0.130 m/s , east?
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Question 13 of 321 PointFor a satellite to orbit Earth at a constant distance, its centrifugal accelerationmust be equal and opposite Earth's gravitational acceleration. If a satellite isto orbit at a constant distance from Earth at a circular radius of 7,000,000 m,what is the required velocity of the satellite? (Assume the acceleration due toEarth's gravity is 8.2 m/s2 at this altitude.)O A. 8239 m/sO B. 7576 m/sC. 6818 m/sD. 7043 m/s
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A 10 N block is at the bottom of a frictionless incline as shown to the right. How much work must be done against gravity to move it to the top of the incline?600j1000j4800j800j
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Practice with DensityPlease choose the correct answer.A piece of metal has a mass of 8.0 gand a volume of 1.4 cm? What isthe density of this metal?0.089 g/cmO 0.17 g/cm35.7 g/cm3O 11 g/cm
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in an elastic collision, both the momentum and the kinetic energy of the system are conserved. Identify which scenario describes an elastic collision. A) A bullet is shot into a wooden block and becomes embedded (stuck)in the blockB)A girtjumps off the dock into a boat. The boat and the girl begin to moveC)Two billiards balls strike each other and bounce off moving in different directionsD)A female ice skater skates to her partner and he lifts her up. They continue to move as he holds her over his head.
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Which of the following data sets has a range of 40? a. {40, 10, 20, 100} c. {40, 10, 20, 50} b. {40, 10, 20, 80} d. {40, 10, 20, 40}
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A given wire of resistance 10ohms has a length of 5m and a cross sectional area of four multiple by ten raise to power minus three meter square.Calculate the conductivity of the wire (ssce June 1995)
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Imagine an isolated positive point charge Q (many times larger than the charge on a single proton). There is a charged particle A (whose charge is much smaller than charge Q) at a distance from the point charge Q. On which of the following quantities does the magnitude of the electric field created by charge Q at particle A's position depend?a) the amount of the charge on the point charge Qb) the specific location of the charged particle A (while the distance between Q and A is fixed)c) the specific location of the point charge Q (while the distance between Q and A is fixed)d) the type of the charge on the charged particle Ae) the relative orientation between Q and A (while the distance between Q and A is fixed)f) the distance between the point charge Q and the charged particle Ag) the amount of the charge on the charged particle A
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Question 1A 10 N block is at the bottom of a frictionless incline as shown to the right. How much work must be done against gravity to move it to the top of the incline?A)600jB)1000jC)4800jD)800j
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Which statement correctly describes the differences between positive and negative acceleration?Positive acceleration describes a change in speed; negative acceleration describes no change in speed.Positive acceleration describes no change in speed; negative acceleration describes a change in speed.Positive acceleration describes an increase in speed; negative acceleration describes a decrease in speed.Positive acceleration describes a decrease in speed; negative acceleration describes an increase in speed.
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g A The box leaves position x=0 with speed v0. The box is slowed by a constant frictional force until it comes to rest at position x=x1. Find Ff, the magnitude of the average frictional force that acts on the box. (Since you don't know the coefficient of friction, don't include it in your answer.) Express the frictional force in terms of m, v0, and x1. View Available Hint(s) Ff = nothing Part B After the box comes to rest at position x1, a person starts pushing the box, giving it a speed v1.
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Which type.of diversity is being lost as the population of rhinoceros become very small
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What is the correct interpretation of the formula Mg3B2?
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Which one of the following is closely related to the law of conservation ofenergy, which states that energy can be transformed in different ways but cannever be created or destroyed?O A. Charles's LawB. Boyle's LawC. Second law of thermodynamicsO D. First law of thermodynamics
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