Physics

a car is traveling at 40 m/s as it enters a turn of radius 25 meters. what minimum coefficient of friction must be maintained between the road and tires to make sure the car does not slide out of the turn?
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NEED HELP ASAP!!!!!!!!!!!!Part BTape a meter stick to the side of the table. Make sure the zero end is on the floor. Carry out the experiment using the four drop heights you chose in task 1, part D. (You may want to have an adult drop the ball while you watch how high it bounces.) Perform three trials for each drop height, and record the data in the table. (You may choose to video the bounces and watch the video in slow motion to improve your data collection.) Finally, average the bounce height measurements to get a final reading. Round the average bounce heights to the nearest whole number.Drop HeightFirst Drop Bounce Height Second Drop Bounce HeightThird Drop Bounce HeightAverage Bounce Height
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A 23.3 kg boy is moving along a circular path with the constant speed of 2.7 m/s. What is the magnitude of the centripetal force acting on the boy if the radius of the circle is 12.9 m. Note : Calculate the answer to 3 (three) significant figures by presenting it in normal ( decimal) form. Don't forget to include the unit.
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It is fun to exercise outside, but you have to be careful when it's hot. What are two things you should always do when you exercise in the heat?
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a 6,300-kg truck runs into the rear of a 1,000-kg car that was stationary. the truck and car are locked together after the collision and move with speed 2 m/s. what was the speed of the truck before the collision?
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which way of varying the normal force to measure the coefficient of friction do you think is better? why?
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a spring with a spring constant of 54n/m sits on a desk. the spring is 44cm long. a block of mass 0.12kg is placed on top of the spring. how high above the desk does the block rest?
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a battery is rated at 12 v and 160 a-h. how much energy does the battery store? select one: a. 3.2 kj b. 1.9 kj c. 1.9 mj d. 6.0 kj e. 6.9 mj
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Which event is an example of vaporization?A. The outside of a glass of ice water becomes moist. B. Perspiration dries on a person's skin. C. A cloud forms in the skyD. Frost forms on a blade of grass
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a stone is thrown down off a bridge with a velocity of 5.6 m/s. what is its velocity after 3 seconds have passed?
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if two sacks, one twice as heavy as the other, are lifted the same vertical distances in the same time, how does the power required for each compare?
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A billiard ball of mass m = 0.150 kg hits the cushion of a billiard table at an angle of 1 = 60.0 degrees at a speed of v1 = 2.50 m/s. It bounces off at an angle of 2 = 47.0 degrees and a speed of v2 = 2.20 m/s.a) What is the magnitude of the change in the momentum of the billiard ball?b) In which direction does the change of momentum vector point? (Take the x-axis along the cushion and specify your answer in degrees.)
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suppose you were dragging a table across a rough floor. in this case, the potential energy for friction depends on which quantity or quantities? (choose all that apply)
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the friends know that the field lines are a pictorial representation of the electric field at points in space. which of jacob's statements regarding the electric field vector and field lines is false?
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a bicycle wheel of radius 40.0 cm and angular velocity of 10.0 rad/s starts accelerating at 80.0 rad/s2. what is the tangential acceleration of the wheel at this time point?
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8. describe the transformation between forms of mechanical energy that is happening to a falling skydiver before her parachute opens.
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what object would absorb the most light? question 1 options: a large piece of white poster board a mirror a black t-shirt a red table cloth
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a metal block of density 900kg weight 60newton in air find it's weight when it is immersed in paraffin wax of density 800kg
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Suppose you are standing on a skateboard or on in-line skates and you toss a backpack full of heavy books toward your friend. What do you think will happen toyou and why? Explain your answer in terms of Newton's third law of motion.
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A wheel is rotating about an axis that is in the z-direction. The angular velocity z is -6. 00 rad/s at t = 0, increases linearly with time, and is +4. 00 rad/s at t = 6. 00 s. We have taken counterclockwise rotation to be positive
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a model depicts two balloons of the same size with identical negative charges being moved toward one another at the same speed. how will the balloons interact with each other?
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a marine biologist is preparing a deep-sea submersible for a dive. the sub stores breathing air under high pressure in a spherical air tank that measures 78.0 cm wide. the biologist estimates she will need 3700. l of air for the dive. calculate the pressure to which this volume of air must be compressed in order to fit into the air tank. write your answer in atmospheres. be sure your answer has the correct number of significant digits.
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A student uses 800 W microwave for 30 seconds how much energy does a student use
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is it possible for the resultant of the electric and magnetic forces on a charge moving simultaneously through both fields to be zero?
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