MORE QUESTIONS The number of bones in the middle ear is ? A) 6 bones B) 3 bones C) 5 bones D) 8 bones Physics Question A stream boat is flowing at 0.75ms-1 and a boat heading perpendicular for the stream landed at the opposite bank at an angle of 30degree Celsius. Calculate the velocity of he boat. Learning how to ride a bicycle or drive a car is the function of what part of brain? A. Cerebrum B. Cerebellum C. Medulla oblongata D. Pons [X + Y = Z is an equilibrium reaction. The addition of a catalyst? A. increase the amount of Z produced in a given time B. increases the rate of change in concentrations of X, Y and Z C. increases the rate of disapearance of X and Y D. increases the rate of the forward reaction E. decreases the amounts of X and Y left after the attainment of equilibrium Incomplete oxidation of ethanol yields A. CH3COOH B. CH3COCH3 C. CH3CH2OCH2CH3 D. CH3CHO The hepatic portal vein is unique because it A. carries deoxygenated blood B. begins and ends with capillaries C. is the largest vein in mammals D. carries digested food E. is the shortest vein in mammals The orbitals that overlap in methane are A p2 and s B sp³ and s C p and s D s and s Which of the following is not a function of the blood? A. Maintenance of body temperature B. Formation of clot C. Distribution of bile D. Transportation of excretory materials : During anaerobic respiration in skeletal muscles, pyruvic acid is A. reduced to lactic acid B. oxidized to ethanol C. oxidized to lactic acid D. reduced to water The end product of the digestion of carbohydrate is? A. amino acid B. glycerol C. glucose D. sucrose Cell Wall of prokaryotic cell is made up of 1)Cellulose. 2)Carbohydrate. 3)Protein. 4)Peptidoglycan Diverging lens are always? Another name for diverging lens is? In a step down transformer Np is expected to be A equal to Ns B >Ns

$$
v_b = v_s \tan(\theta)
$$
$$
v_b = 0.75 \text{ m/s} \times \tan(30^\circ)
$$
$$
v_b = 0.75 \text{ m/s} \times \frac{1}{\sqrt{3}}
$$
$$
v_b \approx 0.75 \text{ m/s} \times 0.57735
$$
$$
v_b \approx 0.433 \text{ m/s}
$$
The velocity of the boat is $\boxed{\text{0.433 m/s}}$.

3. B. Cerebellum The cerebellum is responsible for coordinating voluntary movements, balance, and motor learning, such as riding a bicycle or driving a car.

4. B. increases the rate of change in concentrations of X, Y and Z A catalyst increases the rate of both the forward and reverse reactions equally, thereby increasing the rate at which equilibrium is reached. This means the concentrations of reactants and products change more quickly.

5. D. CH3CHO Incomplete oxidation of ethanol ($\text{CH}_3\text{CH}_2\text{OH}$) yields ethanal ($\text{CH}_3\text{CHO}$), which is an aldehyde. Complete oxidation would yield ethanoic acid ($\text{CH}_3\text{COOH}$).

6. B. begins and ends with capillaries The hepatic portal vein is unique because it carries blood from the capillary beds of the digestive organs (like the intestines) to the capillary beds (sinusoids) of the liver, rather than directly back to the heart.

7. B sp³ and s In methane ($\text{CH}_4$), the carbon atom undergoes $\text{sp}^3$ hybridization. Each of the four $\text{sp}^3$ hybrid orbitals of carbon overlaps with the $1\text{s}$ orbital of a hydrogen atom to form a C-H bond.

8. C. Distribution of bile Blood performs functions like maintenance of body temperature, formation of clots, and transportation of excretory materials. Bile is produced by the liver and transported through bile ducts to the small intestine; it is not distributed by the blood as one of its functions.

9. A. reduced to lactic acid During anaerobic respiration in skeletal muscles, pyruvic acid is reduced to lactic acid to regenerate $\text{NAD}^+$.

10. C. glucose The end product of the digestion of carbohydrates (polysaccharides and disaccharides) is glucose (monosaccharides), which can be absorbed into the bloodstream.

11. 4) Peptidoglycan The cell wall of prokaryotic cells (bacteria) is primarily made up of peptidoglycan.

12. Diverging lenses are always concave. Another name for a diverging lens is a concave lens.

13. In a step-down transformer, $\text{N}_p$ is expected to be B > Ns A step-down transformer reduces the voltage, which means the number of turns in the primary coil ($\text{N}_p$) must be greater than the number of turns in the secondary coil ($\text{N}_s$).