(1 Point)
Physics, 01.03.2021 19:30 dessyrob05
Athletes wear spikes to increaseRequired to answer. Single choice.

(1 Point)
Electrostatic force
Muscular force
gravitational force
Frictional force
55,
Which of these is not true about friction? i. Friction tends to stop a moving object ii. Friction tends to stop a stationary object from moving iii. Friction acts in the same direction as the direction of motion. iv. Friction always help motionRequired to answer. Single choice.

(1 Point)
(i) and (iv)
(i) and (ii)
(iii) and (iv)
(ii) and (iii)
Which of the following is used to reduce friction?Required to answer. Single choice.

(1 Point)
Spikes in the athletic shoes
Set of grooved tyres
grinding stone
Ball bearing
77,
Sliding frictionRequired to answer. Single choice.
(1 Point)
is always greater than static friction
is always greater than rolling friction
is always smaller than rolling friction
may be smaller or greater than rolling friction depending on the surface
88,
In which case is friction a disadvantage?Required to answer. Single choice.
(1 Point)
Running a machine
writing
walking
Applying brakes
99,
The resistance offered by fluidsRequired to answer. Single choice.
(1 Point)
drug
drag
opposite motion
sliding friction
1010,
Which of the following is a contact force? (i) Gravitational force (ii) Electrostatic force (iii) frictional force ( iv) muscular forceRequired to answer. Single choice.
(1 Point)
(iii) and (iv)
( ii) and (iii)
(i) and (iv)
(i) and (ii)
plss tell all the answers its actually options so u can just tell like its the first one for this question in anyways plsss hel
Answers: 3
Physics, 22.06.2019 16:30
In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.
Answers: 3
Physics, 22.06.2019 18:30
Adisk with a radius of r is oriented with its normal unit vector at an angle q with respect to a uniform electric field. which of the following would result in an increase in the electric flux through the disk? check all that apply? a. increasing the area of the disk b. decreasing the given orientation angle of the disk c. decreasing the strength of the electric field d. increasing the given orientation angle of the disk, but not exceeding an angle of 90
Answers: 1
Physics, 23.06.2019 03:00
The device shows the relative humidity at 22°c. what’s the water vapor density if the maximum water vapor in air at this temperature is 20 grams/cubic meter? a device showing that at 22 degrees celsius the relative humidity is 58%. a. 11.6% b. 11.6 g/m3 c. 12.76% d. 12.76 g/m3 reset next
Answers: 2
Physics, 23.06.2019 08:00
The sun's declination is 0° at the a. summer and winter solstice b. summer and winter equinox c. vernal and autumnal solstice d. vernal and autumnal equinox
Answers: 1
Athletes wear spikes to increaseRequired to answer. Single choice.

(1 Point)
(1 Point)
Mathematics, 15.01.2021 18:50
Mathematics, 15.01.2021 18:50
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