What is unit vector and position vector? UNIT VECTOR- a vector which has a magnitude of one. NULL VECTOR- Null vector is a vector with a zero magnitude. POSITION VECTOR- Position vector, straight line having one end fixed to a body and the other end attached to a moving point and used to describe the […]
What are the 5 points of particle theory?
What are the 5 points of particle theory? The five particle theory of matter All matter is made up of very small particles. All particles in a pure substance are the same. Different substances are made up of different particles. There is space between all particles. The particles are always moving. The particles in a […]
Is a phobia a conditioned emotional response?
Is a phobia a conditioned emotional response? The process of classical conditioning can explain how we acquire phobias. After an association has formed, the dog (now a conditioned stimulus) causes a response of fear (conditioned response) and consequently, we develop a phobia. Can a conditioned response be unlearned? Meanwhile, a conditioned response is learned and […]
What is the magnetic field like inside a solenoid?
What is spherical wave example?
What is spherical wave example? One common example of a spherical wave is a sound wave. When an object oscillates or vibrates in the presence of medium, a sound wave is produced and this wave propagates outward in all possible directions. As the wave travels outward, it carries energy. How do you make spherical waves? […]
Why does a bicycle tire expand when filled with gas?
Why does a bicycle tire expand when filled with gas? You can observe a real-life application of Boyle’s Law when you fill your bike tires with air. When you pump air into a tire, the gas molecules inside the tire get compressed and packed closer together. This increases the pressure of the gas, and it […]
How is apparent brightness calculated?
How is apparent brightness calculated? Apparent brightness is thus measured in watts per square meter. For instance, the apparent brightness of the Sun is b = 1370 watts/meter2. That is, if you had a perfectly efficient solar panel one meter on a side, if you held it perpendicular to the Sun’s rays, it would generate […]
What does a negative angular acceleration indicate to you?
What does a negative angular acceleration indicate to you? Negative angular velocity(ω) means that the particle is revolving anticlockwise. Thus, negative angular acceleration(α) is a “push” in the anticlockwise direction. If α and ω have the same sign, the body will speed up, else slow down (and eventually go in reverse). Is clockwise positive or […]
How much forest is cut down for agriculture?
How much forest is cut down for agriculture? Rainforests across the world are in great danger. Food and Agriculture Organization’s 2016 State of the Forests report revealed that 7 million hectares of forest are lost annually while agricultural land expands by 6 million. Does agriculture affect rainforest? Agricultural use of some rainforest land proves to […]
What does the one minute sit up test show in terms of fitness?
What does the one minute sit up test show in terms of fitness? The 1-minute full sit-ups test is currently being widely used in physical fitness test batteries to assess abdominal strength and endurance. Full sit-ups use the hip flexors as well as the abdominals and have been known to increase anterior pelvic tilt, and […]